$adn 2024 Q1 10-Q

Concept	2024 Q1	2023 Q1
Revenue	$3.451M	$977.0K
YoY Change	253.22%	-22.21%
Cost Of Revenue	$1.019M	$1.484M
YoY Change	-31.33%	-2.18%
Gross Profit	$2.432M	-$507.0K
YoY Change	-579.68%	94.25%
Gross Profit Margin	70.47%	-51.89%
Selling, General & Admin	$6.903M	$8.489M
YoY Change	-18.68%	-19.14%
% of Gross Profit	283.84%
Research & Development	$1.415M	$3.141M
YoY Change	-54.95%	46.16%
% of Gross Profit	58.18%
Depreciation & Amortization	$717.0K	$400.0K
YoY Change	79.25%	0.0%
% of Gross Profit	29.48%
Operating Expenses	$8.318M	$11.63M
YoY Change	-28.48%	-8.04%
Operating Profit	-$4.305M	-$11.82M
YoY Change	-63.59%	-9.73%
Interest Expense	-$241.0K	$69.00K
YoY Change	-449.28%	-355.56%
% of Operating Profit
Other Income/Expense, Net	-$17.00K	$173.0K
YoY Change	-109.83%	-5866.67%
Pretax Income	-$9.411M	-$11.19M
YoY Change	-15.91%	135.47%
Income Tax	-$55.00K	$796.0K
% Of Pretax Income
Net Earnings	-$9.356M	-$11.99M
YoY Change	-21.96%	192.68%
Net Earnings / Revenue	-271.11%	-1227.02%
Basic Earnings Per Share	-$3.62	-$0.23
Diluted Earnings Per Share	-$3.62	-$0.23
COMMON SHARES
Basic Shares Outstanding	2.585M shares	52.26M shares
Diluted Shares Outstanding	2.585M shares	52.00M shares

Concept	2024 Q1	2023 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$774.0K	$19.55M
YoY Change	-96.04%	-67.03%
Cash & Equivalents	$774.0K	$19.55M
Short-Term Investments
Other Short-Term Assets	$1.121M	$2.020M
YoY Change	-44.5%	-71.46%
Inventory	$2.077M	$14.86M
Prepaid Expenses	$2.063M	$1.719M
Receivables	$1.085M	$563.0K
Other Receivables	$976.0K	$1.841M
Total Short-Term Assets	$7.229M	$39.00M
YoY Change	-81.46%	-52.8%
LONG-TERM ASSETS
Property, Plant & Equipment	$20.75M	$20.16M
YoY Change	2.91%	124.92%
Goodwill		$5.742M
YoY Change		-80.88%
Intangibles	$77.00K	$5.843M
YoY Change	-98.68%	-74.21%
Long-Term Investments
YoY Change
Other Assets	$301.0K	$5.754M
YoY Change	-94.77%	47.65%
Total Long-Term Assets	$24.92M	$41.85M
YoY Change	-40.45%	-36.15%
TOTAL ASSETS
Total Short-Term Assets	$7.229M	$39.00M
Total Long-Term Assets	$24.92M	$41.85M
Total Assets	$32.15M	$80.85M
YoY Change	-60.23%	-45.44%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.679M	$5.397M
YoY Change	5.23%	10.73%
Accrued Expenses	$813.0K	$1.639M
YoY Change	-50.4%	-0.97%
Deferred Revenue	$2.280M	$986.0K
YoY Change	131.24%	64.33%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$17.26M	$14.91M
YoY Change	15.81%	3.67%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$8.811M	$746.0K
YoY Change	1081.06%	-75.52%
Total Long-Term Liabilities	$8.811M	$10.88M
YoY Change	-18.99%	256.82%
TOTAL LIABILITIES
Total Short-Term Liabilities	$17.26M	$14.91M
Total Long-Term Liabilities	$8.811M	$10.88M
Total Liabilities	$26.07M	$25.78M
YoY Change	1.13%	31.38%
SHAREHOLDERS EQUITY
Retained Earnings		-$119.8M
YoY Change
Common Stock	$0.00	$5.000K
YoY Change	-100.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.079M	$55.07M
YoY Change
Total Liabilities & Shareholders Equity	$32.15M	$80.85M
YoY Change	-60.23%	-45.44%

Concept	2024 Q1	2023 Q1
OPERATING ACTIVITIES
Net Income	-$9.356M	-$11.99M
YoY Change	-21.96%	192.68%
Depreciation, Depletion And Amortization	$717.0K	$400.0K
YoY Change	79.25%	0.0%
Cash From Operating Activities	-$2.876M	-$11.45M
YoY Change	-74.88%	-40.72%
INVESTING ACTIVITIES
Capital Expenditures	$29.00K	$911.0K
YoY Change	-96.82%	-194.6%
Acquisitions
YoY Change
Other Investing Activities		-$976.0K
YoY Change		1976.6%
Cash From Investing Activities	-$29.00K	-$1.887M
YoY Change	-98.46%	86.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$126.0K
YoY Change
NET CHANGE
Cash From Operating Activities	-$2.876M	-$11.45M
Cash From Investing Activities	-$29.00K	-$1.887M
Cash From Financing Activities	$126.0K
Net Change In Cash	-$2.779M	-$13.34M
YoY Change	-79.16%	-34.38%
FREE CASH FLOW
Cash From Operating Activities	-$2.876M	-$11.45M
Capital Expenditures	$29.00K	$911.0K
Free Cash Flow	-$2.905M	-$12.36M
YoY Change	-76.49%	-32.64%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent		usd
CY2023Q4	adn	Loss Contingency Liabilities LossContingencyLiabilities		usd
CY2024Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent		usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue		usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue		usd
CY2023Q1	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1		usd
CY2023Q1	adn	Loss Contingency LossContingency		usd
CY2024Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation		usd
CY2023Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation		usd
CY2023Q1	us-gaap	Litigation Settlement Expense LitigationSettlementExpense		usd
CY2023Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1		usd
CY2023Q1	adn	Provision For Inventories ProvisionForInventories		usd
CY2023Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue		usd
CY2023Q1	adn	Increase In Loss Contingency Liability IncreaseInLossContingencyLiability		usd
CY2024Q1	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities		usd
CY2024Q1	adn	Payments To Acquire Fixed Assets PaymentsToAcquireFixedAssets		usd
CY2023Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises		usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	684000	usd
CY2023Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	9376000	usd
CY2024Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2024Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2605135	shares
CY2024Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2605135	shares
CY2024Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2024Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2024Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2024Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	194941000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	13448000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	34737000	usd
CY2024Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1019000	usd
CY2024Q1	us-gaap	Gross Profit GrossProfit	2432000	usd
CY2023Q1	us-gaap	Gross Profit GrossProfit	-507000	usd
CY2024Q1	adn	Income From Grant IncomeFromGrant	1437000	usd
CY2023Q1	adn	Income From Grant IncomeFromGrant	534000	usd
CY2024Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	1415000	usd
CY2023Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	3141000	usd
CY2024Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	6903000	usd
CY2023Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	8489000	usd
CY2024Q1	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	145000	usd
CY2024Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1000	usd
CY2023Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	221000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities		usd
CY2023Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent		usd
CY2024Q1	adn	Additions Additions		usd
CY2024Q1	adn	Settlements Settlements		usd
CY2023Q1	adn	Provision For Slow Moving Inventory Additions ProvisionForSlowMovingInventoryAdditions		usd
CY2024Q1	adn	Purchases Under Receipt PurchasesUnderReceipt		usd
CY2023Q4	adn	Accrued Interest Income AccruedInterestIncome		usd
CY2024Q1	adn	Contractual Obligation Quantity Pieces Year Two ContractualObligationQuantityPiecesYearTwo		integer
CY2023Q4	us-gaap	Goodwill Goodwill		usd
CY2023Q4	adn	Available For Sale Financial Asset AvailableForSaleFinancialAsset		usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue		usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue		usd
CY2024Q1	adn	Available For Sale Financial Asset AvailableForSaleFinancialAsset		usd
CY2024Q1	adn	Warrant Liability WarrantLiability		usd
CY2024Q1	us-gaap	Common Stock Value CommonStockValue		usd
CY2024Q1	us-gaap	Preferred Stock Value PreferredStockValue		usd
CY2024Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	5637 La Ribera St.
CY2024Q1	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite A
CY2024Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Livermore
CY2024Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2024Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	94550
CY2024Q1	dei	City Area Code CityAreaCode	(925)
CY2024Q1	dei	Local Phone Number LocalPhoneNumber	455-9400
CY2024Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	No
CY2024Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	No
CY2024Q1	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2024Q1	dei	Entity Small Business EntitySmallBusiness	true
CY2024Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2024Q1	dei	Entity Shell Company EntityShellCompany	false
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	2636508	shares
CY2024Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	774000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3562000	usd
CY2024Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	98000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	100000	usd
CY2024Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1085000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	191000	usd
CY2024Q1	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	11000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	21000	usd
CY2024Q1	us-gaap	Inventory Net InventoryNet	2077000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	2707000	usd
CY2024Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3184000	usd
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	2254000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	8835000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	79000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21549000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3216000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	750000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	308000	usd
CY2024Q1	us-gaap	Assets Noncurrent AssetsNoncurrent	24923000	usd
CY2023Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	25902000	usd
CY2024Q1	us-gaap	Assets Assets	32152000	usd
CY2023Q4	us-gaap	Assets Assets	34737000	usd
CY2024Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	5679000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	5087000	usd
CY2024Q1	us-gaap	Deferred Income Current DeferredIncomeCurrent	7000	usd
CY2023Q4	us-gaap	Deferred Income Current DeferredIncomeCurrent	530000	usd
CY2024Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2280000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2015000	usd
CY2024Q1	adn	Loss Contingency Liabilities LossContingencyLiabilities	5140000	usd
CY2024Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1816000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1916000	usd
CY2024Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2164000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2186000	usd
CY2024Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	176000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	179000	usd
CY2024Q1	us-gaap	Liabilities Current LiabilitiesCurrent	17262000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	11913000	usd
CY2023Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	59000	usd
CY2023Q4	adn	Longterm Operating Lease Liabilities LongtermOperatingLeaseLiabilities	8230000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	83000	usd
CY2023Q4	us-gaap	Deferred Income Noncurrent DeferredIncomeNoncurrent	320000	usd
CY2023Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	9376000	usd
CY2024Q1	us-gaap	Liabilities Liabilities	26073000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	21289000	usd
CY2024Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2024Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2024Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2605135	shares
CY2024Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2605135	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2580159	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2580159	shares
CY2024Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2024Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2024Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2024Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2024Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	197000000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	194941000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2334000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-179159000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	13448000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	34737000	usd
CY2024Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1019000	usd
CY2024Q1	us-gaap	Gross Profit GrossProfit	2432000	usd
CY2023Q1	us-gaap	Gross Profit GrossProfit	-507000	usd
CY2024Q1	adn	Income From Grant IncomeFromGrant	1437000	usd
CY2023Q1	adn	Income From Grant IncomeFromGrant	534000	usd
CY2024Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	1415000	usd
CY2023Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	3141000	usd
CY2024Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	6903000	usd
CY2023Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	8489000	usd
CY2024Q1	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	145000	usd
CY2024Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1000	usd
CY2023Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	221000	usd
CY2024Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-4305000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-11824000	usd
CY2023Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-390000	usd
CY2024Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-232000	usd
CY2023Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	110000	usd
CY2024Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-9000	usd
CY2023Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-41000	usd
CY2024Q1	adn	Loss Contingency LossContingency	4907000	usd
CY2024Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-17000	usd
CY2023Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	173000	usd
CY2024Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-9411000	usd
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-11192000	usd
CY2024Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-55000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	796000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.92
CY2024Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.62
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.92
CY2024Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2584918	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1733439	shares
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2024Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-4305000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-11824000	usd
CY2024Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-59000	usd
CY2023Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-390000	usd
CY2024Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-232000	usd
CY2023Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	110000	usd
CY2024Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-9000	usd
CY2023Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-41000	usd
CY2024Q1	adn	Loss Contingency LossContingency	4907000	usd
CY2024Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-17000	usd
CY2024Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-9411000	usd
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-11192000	usd
CY2024Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-55000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	796000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2024Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.62
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.92
CY2024Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2584918	shares
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1733439	shares
CY2024Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.62
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.92
CY2024Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2584918	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1733439	shares
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-72000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	336000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-72000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	336000	usd
CY2024Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-9428000	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-11652000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	13448000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	126000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1933000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2024Q1	us-gaap	Stockholders Equity StockholdersEquity	6079000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	64148000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2572000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	336000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2024Q1	us-gaap	Depreciation Depreciation	717000	usd
CY2023Q1	us-gaap	Adjustment For Amortization AdjustmentForAmortization	221000	usd
CY2024Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-59000	usd
CY2024Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1933000	usd
CY2023Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2572000	usd
CY2024Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-55000	usd
CY2023Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	797000	usd
CY2024Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-21000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-72000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	336000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-72000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	336000	usd
CY2024Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-9428000	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-11652000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	13448000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	126000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1933000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2024Q1	us-gaap	Stockholders Equity StockholdersEquity	6079000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	64148000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2572000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	55068000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	-9356000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-11988000	usd
CY2024Q1	us-gaap	Depreciation Depreciation	717000	usd
CY2023Q1	us-gaap	Depreciation Depreciation	401000	usd
CY2024Q1	us-gaap	Adjustment For Amortization AdjustmentForAmortization	1000	usd
CY2023Q1	us-gaap	Adjustment For Amortization AdjustmentForAmortization	221000	usd
CY2024Q1	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	4907000	usd
CY2024Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-59000	usd
CY2023Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-390000	usd
CY2024Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1933000	usd
CY2023Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2572000	usd
CY2024Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-55000	usd
CY2023Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	797000	usd
CY2024Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-21000	usd
CY2024Q1	adn	Provision For Inventories ProvisionForInventories	239000	usd
CY2024Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	5000	usd
CY2023Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	6000	usd
CY2024Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	896000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-463000	usd
CY2024Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-9000	usd
CY2023Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	241000	usd
CY2024Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-348000	usd
CY2023Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1992000	usd
CY2024Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	910000	usd
CY2023Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1566000	usd
CY2024Q1	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-5000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-1197000	usd
CY2024Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	625000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-930000	usd
CY2024Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-632000	usd
CY2024Q1	adn	Increase In Loss Contingency Liability IncreaseInLossContingencyLiability	233000	usd
CY2024Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	292000	usd
CY2023Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-22000	usd
CY2024Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-73000	usd
CY2024Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	5000	usd
CY2023Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	6000	usd
CY2024Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	896000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-463000	usd
CY2023Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	241000	usd
CY2024Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-348000	usd
CY2023Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1992000	usd
CY2024Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	910000	usd
CY2023Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1566000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-1197000	usd
CY2024Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	625000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-930000	usd
CY2024Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-632000	usd
CY2024Q1	adn	Increase In Loss Contingency Liability IncreaseInLossContingencyLiability	233000	usd
CY2024Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-73000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	362000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-118000	usd
CY2024Q1	adn	Increase Decrease In Operating Lease Asset And Liabilities IncreaseDecreaseInOperatingLeaseAssetAndLiabilities	-230000	usd
CY2023Q1	adn	Increase Decrease In Operating Lease Asset And Liabilities IncreaseDecreaseInOperatingLeaseAssetAndLiabilities	-220000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2876000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-11448000	usd
CY2024Q1	us-gaap	Payments To Acquire Machinery And Equipment PaymentsToAcquireMachineryAndEquipment	29000	usd
CY2023Q1	adn	Payments To Acquire Fixed Assets PaymentsToAcquireFixedAssets	976000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1887000	usd
CY2024Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	126000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	126000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2779000	usd
CY2024Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-11000	usd
CY2023Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4412000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33619000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1622000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	20295000	usd
CY2024Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	774000	usd
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	19545000	usd
CY2023Q1	us-gaap	Restricted Cash Equivalents Noncurrent RestrictedCashEquivalentsNoncurrent	750000	usd
CY2024Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1622000	usd
CY2023Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	20295000	usd
CY2024Q1	us-gaap	Basis Of Accounting BasisOfAccounting	<p id="xdx_80F_eus-gaap--BasisOfAccounting_znCQFGnnCy4i" style="font: 10pt Times New Roman, Times, Serif; text-align: justify; margin-top: 0pt; margin-bottom: 0pt"> <b>1.</b> <b><span id="xdx_823_zhCk9ibadRSj">Basis of presentation</span></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i>Overview</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Advent Technologies Holdings, Inc. and its subsidiaries (collectively referred to as “Advent” and the “Company”) is an advanced materials and technology development company operating in the fuel cell, methanol, and hydrogen technology space. Advent is a world-leading company in the development of the HT-PEM technology (with more than 150 patents issued, pending, or licensed worldwide). The HT-PEM fuel cell technology developed by Advent enables off-grid power systems to produce clean power from various green fuels (hydrogen, methanol, bio and eMethanol, and renewable natural gas) and to function with higher efficiency at extreme ambient temperatures and in general extreme environmental conditions (humidity, air pollution). Advent’s main operations focus on developing and manufacturing the Membrane Electrode Assembly (MEA), which is the core electrochemical element and the most critical component of the fuel cell. The MEA largely determines lifetime, power density, efficiency, and overall cost of installation and operation for all applications. Advent is working with world-leading market-leading OEMs with the goal of bringing to the market complete fuel cell systems for a range of applications in the stationary power markets (backup, off-grid, and portable power) and the heavy-duty mobility markets (automotive, aviation, marine).</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Advent has its headquarters in Livermore, California, and the Company has MEA and fuel cell product development facilities in Livermore, California and Patras, Greece. Previously, the Company’s headquarters were located in Boston, Massachusetts. During 2023, the Company decided to consolidate certain of its German operations with its operations in Greece. During June 2024, the Company closed its facilities in Boston, MA, and no longer maintains its facilities in Denmark and the Philippines due to the bankruptcy of Advent Technologies A/S in July 2024, as discussed in Note 22 Subsequent events.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On February 4, 2021 (“Closing Date”), AMCI Acquisition Corp. (“AMCI”), consummated the business combination (the “Business Combination”) pursuant to that certain merger agreement (the “Agreement and Plan of Merger”), dated October 12, 2020, by and among AMCI, AMCI Merger Sub Corp., a Delaware corporation and newly formed wholly-owned subsidiary of AMCI (“Merger Sub”), AMCI Sponsor LLC (the “Sponsor”), solely in the capacity as the representative from and after the effective time of the Business Combination for the stockholders of AMCI, Advent Technologies, Inc., a Delaware corporation (“Legacy Advent”), and Vassilios Gregoriou, solely in his capacity as the representative from and after the effective time for the Legacy Advent stockholders (the “Seller Representative”), as amended by Amendment No. 1 and Amendment No. 2 to the Agreement and Plan of Merger, dated as of October 19, 2020 and December 31, 2020, respectively, by and among AMCI, Merger Sub, Sponsor, Legacy Advent, and Seller Representative. In connection with the closing of the Business Combination (the “Closing”), AMCI acquired <span id="xdx_909_eus-gaap--BusinessAcquisitionPercentageOfVotingInterestsAcquired_c20210204__us-gaap--BusinessAcquisitionAxis__custom--AMCIAcquisitionCorpMember_pdd" title="Acquired percentage">100%</span> of the stock of Legacy Advent (as it existed immediately prior to the Closing) and its subsidiaries.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On the Closing Date, and in connection with the closing of the Business Combination, AMCI changed its name to Advent Technologies Holdings, Inc. Legacy Advent was deemed the accounting acquirer in the Business Combination based on an analysis of the criteria outlined in Accounting Standards Codification (“ASC”) 805. This determination was primarily based on Legacy Advent’s stockholders prior to the Business Combination having a majority of the voting interests in the combined company, Legacy Advent’s operations comprising the ongoing operations of the combined company, Legacy Advent’s board of directors comprising a majority of the board of directors of the combined company, and Legacy Advent’s senior management comprising the senior management of the combined company. Accordingly, for accounting purposes, the Business Combination was treated as the equivalent of Legacy Advent issuing stock for the net assets of AMCI, accompanied by a recapitalization. The net assets of AMCI are stated at historical cost, with no goodwill or other intangible assets recorded.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">While AMCI was the legal acquirer in the Business Combination, because Legacy Advent was deemed the accounting acquirer, the historical financial statements of Legacy Advent became the historical financial statements of the combined company, upon the consummation of the Business Combination. As a result, the consolidated financial statements included in this report reflect (i) the historical operating results of Legacy Advent prior to the Business Combination; (ii) the results of the Company (combined results of AMCI and Legacy Advent) following the closing of the Business Combination; (iii) the assets and liabilities of Legacy Advent at their historical cost; and (iv) Company’s equity structure for all periods presented.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In accordance with guidance applicable to these circumstances, the equity structure has been restated in all comparative periods up to the Closing Date, to reflect the number of shares of the Company’s common stock, $<span id="xdx_900_eus-gaap--CommonStockParOrStatedValuePerShare_c20210204__us-gaap--BusinessAcquisitionAxis__custom--AMCIAcquisitionCorpMember_pdd" title="Common stock, par value (in dollars per share)">0.0001</span> par value per share, issued to Legacy Advent’s stockholders in connection with the recapitalization transaction. As such, the shares and corresponding capital amounts and earnings per share related to Legacy Advent Preferred Stock (“Preferred Series A” and “Preferred Series Seed”) and Legacy Advent common stock prior to the Business Combination have been retroactively restated as shares reflecting the exchange ratio established in the Business Combination Agreement. Activity within the statement of changes in stockholders’ equity / (deficit) for the issuances of Legacy Advent’s Preferred Stock, were also retroactively converted to Legacy Advent common stock.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On February 18, 2021, Advent Technologies, Inc. entered into a Membership Interest Purchase Agreement with Bren-Tronics, Inc. (“Bren-Tronics”) and UltraCell, LLC (“UltraCell”), a Delaware limited liability company and a direct wholly owned subsidiary of Bren-Tronics.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">UltraCell LLC was renamed to Advent Technologies LLC following its acquisition by the Company.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On June 25, 2021, the Company entered into a Share Purchase Agreement, with F.E.R. fischer Edelstahlrohre GmbH, a limited liability company incorporated under the Laws of Germany (the “Seller”) to acquire all of the issued and outstanding equity interests in SerEnergy A/S, a Danish stock corporation and a wholly-owned subsidiary of the Seller (“SerEnergy”) and fischer eco solutions GmbH, a German limited liability company and a wholly-owned subsidiary of the Seller (“FES”) together with certain outstanding shareholder loan receivables.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">SerEnergy and FES were renamed to Advent Technologies A/S and Advent Technologies GmbH, respectively, following their acquisition by the Company on August 31, 2021.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The unaudited condensed consolidated financial statements of the Company have been prepared to reflect the consolidation of the companies listed below:</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <table cellpadding="0" cellspacing="0" id="xdx_885_ecustom--SubsidiariesInConsolidationTableTextBlock_pn3n3_zwFBqGDgZA8h" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Basis of presentation (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_8B8_zrKhH5Q7yNnh" style="display: none">Schedule of subsidiaries in consolidation</span></td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td></tr> <tr style="vertical-align: bottom"> <td style="vertical-align: bottom; font-weight: bold; text-align: left"> </td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="font-weight: bold; text-align: center">Country of</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Ownership Interest</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Statements of Operations</td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; vertical-align: bottom; font-weight: bold; text-align: left">Company Name</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Incorporation</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Direct</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Indirect</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2024</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2023</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; width: 41%; text-align: left"><span id="xdx_904_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Company Name">Advent Technologies, Inc.</span></td><td style="text-align: center; width: 1%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_900_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Country of Incorporation">USA</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0571">-</span></span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90A_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_907_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Company Name">Advent Technologies S.A.</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_906_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Country of Incorporation">Greece</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0581">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_901_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Company Name">Advent Technologies LLC</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90B_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Country of Incorporation">USA</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_901_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0593">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90D_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_90B_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Company Name">Advent Technologies GmbH</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_900_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Country of Incorporation">Germany</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0607">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_907_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Company Name">Advent Technologies A/S</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_906_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Country of Incorporation">Denmark</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0619">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_90D_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Company Name">Advent Green Energy Philippines, Inc</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Country of Incorporation">Philippines</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0629">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90B_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> </table> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company has limited financial information, for the period January 1, 2024, through March 31, 2024, including the statement of operation information for Advent Technologies A/S, its wholly owned subsidiary Advent Green Energy Philippines, Inc. and Advent Technologies GmbH due to the bankruptcy of Advent Technologies A/S and the related loss of access to the underlying accounting records and access to Company finance personnel. The Company estimated changes in balance sheet accounts, revenue and expenses based upon bank statements and internal management reporting. The subsidiaries do not qualify for discontinued operations until Q3 2024.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; text-align: justify; margin-top: 0pt; margin-bottom: 0pt"><b><i>Unaudited Condensed Consolidated Financial Statements</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”). The unaudited financial information reflects, in the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. The results reported for the interim period presented are not necessarily indicative of results that may be expected for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023, included in the Annual Report on Form 10-K filed with the SEC on August 13, 2024. We reclassified certain prior year amounts in our consolidated financial statements to conform to the current year presentation.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Share and per share amounts are presented on a post-conversion basis for all periods presented, unless otherwise specified.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i>Going Concern</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The accompanying unaudited condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern. The Company considers that the going concern basis is appropriate for the preparation of its unaudited condensed consolidated financial statements, as it is pursuing additional fund raising as disclosed below and has no intentions to proceed with liquidation. The going concern basis of presentation assumes that the Company will continue in operation one year from the date these unaudited condensed consolidated financial statements are issued and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. As such, the accompanying unaudited condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Following the significant non adjusting subsequent events of Advent Technologies A/S bankruptcy and the termination of the Hood Park lease agreement, the Company presents a Proforma Consolidated Balance Sheet as at March 31, 2024 and December 31, 2023 in the Note 22 to the consolidated financial statements to reflect the impact of those events.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern for one year from the date that the unaudited condensed consolidated financial statements are issued. The Company’s ability to meet its liquidity needs will largely depend on its ability to generate cash in the future. During the three months ended March 31, 2024, the Company used $2.9 <span id="xdx_90C_eus-gaap--NetCashProvidedByUsedInOperatingActivities_pn3n3_c20240101__20240331_zkMI3IEltRcd" style="display: none" title="Net cash used in operating activities">(2,876)</span> million of cash in operating activities, and the Company’s ability to generate cash in the future is subject to general economic, financial, competitive, legislative, regulatory, and other factors that are beyond the Company’s control. Furthermore, the Company has suffered recurring operating losses and has a negative net working capital position of $<span id="xdx_907_ecustom--NegativeNetWorkingCapital_iI_pn3n3_dm_c20240331_zO63Dxe7DQWk" title="Negative net working capital">10.0</span> million as of March 31, 2024. In addition, as of the issuance date of these unaudited condensed consolidated financial statements the Company is overdue in a number of its obligations which could give the right to creditors at any time from the issuance date of these consolidated financial statements to raise legal action against the Company which in turn could potentially lead to liquidation action against the Company and/or its subsidiaries. The transition to profitability and positive cash flow is highly dependent upon the successful development, approval, and commercialization of the Company’s products and the achievement of a revenue level adequate to support its cost structure and the Company can give no assurances that this will occur. Based on the Company’s current operating plan, the Company believes that its cash and cash equivalents as of March 31, 2024, of $<span id="xdx_90B_eus-gaap--CashAndCashEquivalentsAtCarryingValue_iI_pn3n3_dm_c20240331__us-gaap--CashAndCashEquivalentsAxis__us-gaap--CashEquivalentsMember_zGCxC6BrvP58" title="Cash and cash equivalents">0.8</span> million and $<span id="xdx_901_eus-gaap--CashAndCashEquivalentsAtCarryingValue_iI_pn3n3_dm_c20240925__us-gaap--CashAndCashEquivalentsAxis__us-gaap--CashEquivalentsMember_zmfp1iGaUtSi" title="Cash and cash equivalents">0.5</span> million as of September 25, 2024, are not sufficient to fund operations and capital expenditures for the twelve months following the filing of this Quarterly Report on Form 10-Q, and the Company will need to obtain additional funding in the very near term, otherwise the Company may immediately substantially curtail or terminate its operations.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company performed a cash flow projection on a monthly basis for the twelve-month period following the issuance of the consolidated financial statements. With regards to the cash flow projections, the projected inflows from revenues and grants will be insufficient to cover the projected outflows, as such, the Company will continue to have a negative net working capital position and a delay in the projected timing of the short term financing and inflows and/or an immediate demand by creditors of repayment of the long outstanding payables may result in the Company being insolvent and short of cash at any specific time over the coming weeks and over the next twelve months.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The highlights of the projections are as follows:</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company projects cash inflows from contracted revenues and grants for which it has already signed agreements with third parties and estimates projected outflows assuming the effective implementation of the Company’s plans to reduce monthly expenditures gradually during 2024.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The cash flow projections do not include any cash inflows or outflows from Advent Technologies A/S which was declared bankrupt by the court in Aalborg, Denmark on July 25, 2024, and its wholly owned subsidiary Green Energy Philippines, Inc. The Company did not include any outflows relating to Advent Technologies A/S, since it believes that the bankruptcy of its subsidiary, will not have any material effect, except for a potential claim of approximately $0.5 million from a supplier contract for which the parent company Advent Technologies Holdings, Inc. is the guarantor.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In addition, the projections do not include any cash outflows relating to commitments and contingencies as disclosed in Note 20 to the unaudited condensed consolidated financial statements, since the Company believes that any cash outflows relating to these commitments will not materialize based on the Company’s plans to agree the termination of such contracts with its suppliers and a contingent loss as outcome of the pending arbitration it is not probable.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Until such time as the Company generates sufficient revenue to fund its operations (if ever), the Company plans to finance its operations and repay its existing and future liabilities and other obligations through the sale of equity and/or debt securities and, to the extent available, short-term and long-term loans. As part of its plan, on July 30, 2024, the Company entered into a securities purchase agreement, (the “Purchase Agreement”), with an institutional investor (the “Investor”) pursuant to which, at the closing, defined as the filing date of the Company’s 10-K, the Company will issue to the Investor a senior promissory note in the principal amount of $1 million (the “Senior Note”), repayable within one year and bearing interest of 18%. The Company has not yet closed on the $1 million financing and no loan proceeds have yet been received by the Company. However, the Company and the Investor are working together to close this financing as soon as possible. The Investor has also committed to provide the Company with a one-year revolving line of credit for an aggregate maximum principal amount of $2 million, again bearing interest of 18% (the two debt transactions are referred to as the “Financing”). The $2 million financing is contingent upon the Company’s filing of a Registration Statement on Form S-1 with the Securities and Exchange Commission with respect to an underwritten or “best efforts” public offering by the Company of its common stock, and/or common stock equivalents registered under the Securities Act of 1933, as amended for proceeds to the Company of not less than $5 million (a “Qualified Public Equity Offering”). The Company can give no assurances as of the date of issuance of the consolidated financial statements as to whether the Company will be successful in raising this Financing and executing a Qualified Public Equity Offering. The Company will use the proceeds from the Financing for general corporate purposes, including expenses related to the preparation of its Quarterly Report on Form 10-Q for the three months ended March 31, 2024, and expenses to facilitate a Qualified Public Equity Offering and the proceeds of the Qualified Public Equity Offering for general corporate purposes.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">With regards to the projected revenues and grants, a delay in the projected timing of inflows may result in the Company remaining insolvent and short of cash at any specific time over the next twelve months. Also, there is no guarantee that the Company’s plans to reduce monthly expenditures will be successful. Beyond that, there is no guarantee about when the Registration Statement in Form S-1 will be filed and therefore the committed one-year revolving line of credit of maximum $2 million will be received. In addition, there is no guarantee with regards to the Company’s ability to secure proceeds of not less than $5 million from the Qualified Public Entity Offering.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">If the Company is unable to obtain sufficient funding, it could be required to delay its development efforts, limit activities, and further reduce research and development costs, which could adversely affect its business prospects and delivery of contractual obligations. A cash shortfall at any point in time over the next twelve months could result in the Company failing to meet its overdue and current obligations which could trigger action against the Company and/or its subsidiaries for liquidation by employees, authorities, or creditors. Because of the uncertainty in securing additional funding, delays in growth of revenue, failure to materialize cost-cutting efforts and the insufficient amount of cash and cash equivalents as of the consolidated financial statement filing date, management has concluded that substantial doubt exists with respect to the Company’s ability to continue as a going concern for one year from the date the unaudited condensed consolidated financial statements are issued.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p>
CY2023Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	362000	usd
CY2024Q1	adn	Increase Decrease In Operating Lease Asset And Liabilities IncreaseDecreaseInOperatingLeaseAssetAndLiabilities	-230000	usd
CY2023Q1	adn	Increase Decrease In Operating Lease Asset And Liabilities IncreaseDecreaseInOperatingLeaseAssetAndLiabilities	-220000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-11448000	usd
CY2024Q1	us-gaap	Payments To Acquire Machinery And Equipment PaymentsToAcquireMachineryAndEquipment	29000	usd
CY2023Q1	us-gaap	Payments To Acquire Machinery And Equipment PaymentsToAcquireMachineryAndEquipment	911000	usd
CY2023Q1	adn	Payments To Acquire Fixed Assets PaymentsToAcquireFixedAssets	976000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1887000	usd
CY2024Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	126000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	126000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2779000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-13335000	usd
CY2024Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-11000	usd
CY2023Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33619000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1622000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	20295000	usd
CY2024Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	774000	usd
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	19545000	usd
CY2024Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	98000	usd
CY2024Q1	us-gaap	Restricted Cash Equivalents Noncurrent RestrictedCashEquivalentsNoncurrent	750000	usd
CY2023Q1	us-gaap	Restricted Cash Equivalents Noncurrent RestrictedCashEquivalentsNoncurrent	750000	usd
CY2024Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1622000	usd
CY2023Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	20295000	usd
CY2024Q1	us-gaap	Basis Of Accounting BasisOfAccounting	<p id="xdx_80F_eus-gaap--BasisOfAccounting_znCQFGnnCy4i" style="font: 10pt Times New Roman, Times, Serif; text-align: justify; margin-top: 0pt; margin-bottom: 0pt"> <b>1.</b> <b><span id="xdx_823_zhCk9ibadRSj">Basis of presentation</span></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i>Overview</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Advent Technologies Holdings, Inc. and its subsidiaries (collectively referred to as “Advent” and the “Company”) is an advanced materials and technology development company operating in the fuel cell, methanol, and hydrogen technology space. Advent is a world-leading company in the development of the HT-PEM technology (with more than 150 patents issued, pending, or licensed worldwide). The HT-PEM fuel cell technology developed by Advent enables off-grid power systems to produce clean power from various green fuels (hydrogen, methanol, bio and eMethanol, and renewable natural gas) and to function with higher efficiency at extreme ambient temperatures and in general extreme environmental conditions (humidity, air pollution). Advent’s main operations focus on developing and manufacturing the Membrane Electrode Assembly (MEA), which is the core electrochemical element and the most critical component of the fuel cell. The MEA largely determines lifetime, power density, efficiency, and overall cost of installation and operation for all applications. Advent is working with world-leading market-leading OEMs with the goal of bringing to the market complete fuel cell systems for a range of applications in the stationary power markets (backup, off-grid, and portable power) and the heavy-duty mobility markets (automotive, aviation, marine).</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Advent has its headquarters in Livermore, California, and the Company has MEA and fuel cell product development facilities in Livermore, California and Patras, Greece. Previously, the Company’s headquarters were located in Boston, Massachusetts. During 2023, the Company decided to consolidate certain of its German operations with its operations in Greece. During June 2024, the Company closed its facilities in Boston, MA, and no longer maintains its facilities in Denmark and the Philippines due to the bankruptcy of Advent Technologies A/S in July 2024, as discussed in Note 22 Subsequent events.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On February 4, 2021 (“Closing Date”), AMCI Acquisition Corp. (“AMCI”), consummated the business combination (the “Business Combination”) pursuant to that certain merger agreement (the “Agreement and Plan of Merger”), dated October 12, 2020, by and among AMCI, AMCI Merger Sub Corp., a Delaware corporation and newly formed wholly-owned subsidiary of AMCI (“Merger Sub”), AMCI Sponsor LLC (the “Sponsor”), solely in the capacity as the representative from and after the effective time of the Business Combination for the stockholders of AMCI, Advent Technologies, Inc., a Delaware corporation (“Legacy Advent”), and Vassilios Gregoriou, solely in his capacity as the representative from and after the effective time for the Legacy Advent stockholders (the “Seller Representative”), as amended by Amendment No. 1 and Amendment No. 2 to the Agreement and Plan of Merger, dated as of October 19, 2020 and December 31, 2020, respectively, by and among AMCI, Merger Sub, Sponsor, Legacy Advent, and Seller Representative. In connection with the closing of the Business Combination (the “Closing”), AMCI acquired <span id="xdx_909_eus-gaap--BusinessAcquisitionPercentageOfVotingInterestsAcquired_c20210204__us-gaap--BusinessAcquisitionAxis__custom--AMCIAcquisitionCorpMember_pdd" title="Acquired percentage">100%</span> of the stock of Legacy Advent (as it existed immediately prior to the Closing) and its subsidiaries.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On the Closing Date, and in connection with the closing of the Business Combination, AMCI changed its name to Advent Technologies Holdings, Inc. Legacy Advent was deemed the accounting acquirer in the Business Combination based on an analysis of the criteria outlined in Accounting Standards Codification (“ASC”) 805. This determination was primarily based on Legacy Advent’s stockholders prior to the Business Combination having a majority of the voting interests in the combined company, Legacy Advent’s operations comprising the ongoing operations of the combined company, Legacy Advent’s board of directors comprising a majority of the board of directors of the combined company, and Legacy Advent’s senior management comprising the senior management of the combined company. Accordingly, for accounting purposes, the Business Combination was treated as the equivalent of Legacy Advent issuing stock for the net assets of AMCI, accompanied by a recapitalization. The net assets of AMCI are stated at historical cost, with no goodwill or other intangible assets recorded.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">While AMCI was the legal acquirer in the Business Combination, because Legacy Advent was deemed the accounting acquirer, the historical financial statements of Legacy Advent became the historical financial statements of the combined company, upon the consummation of the Business Combination. As a result, the consolidated financial statements included in this report reflect (i) the historical operating results of Legacy Advent prior to the Business Combination; (ii) the results of the Company (combined results of AMCI and Legacy Advent) following the closing of the Business Combination; (iii) the assets and liabilities of Legacy Advent at their historical cost; and (iv) Company’s equity structure for all periods presented.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In accordance with guidance applicable to these circumstances, the equity structure has been restated in all comparative periods up to the Closing Date, to reflect the number of shares of the Company’s common stock, $<span id="xdx_900_eus-gaap--CommonStockParOrStatedValuePerShare_c20210204__us-gaap--BusinessAcquisitionAxis__custom--AMCIAcquisitionCorpMember_pdd" title="Common stock, par value (in dollars per share)">0.0001</span> par value per share, issued to Legacy Advent’s stockholders in connection with the recapitalization transaction. As such, the shares and corresponding capital amounts and earnings per share related to Legacy Advent Preferred Stock (“Preferred Series A” and “Preferred Series Seed”) and Legacy Advent common stock prior to the Business Combination have been retroactively restated as shares reflecting the exchange ratio established in the Business Combination Agreement. Activity within the statement of changes in stockholders’ equity / (deficit) for the issuances of Legacy Advent’s Preferred Stock, were also retroactively converted to Legacy Advent common stock.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On February 18, 2021, Advent Technologies, Inc. entered into a Membership Interest Purchase Agreement with Bren-Tronics, Inc. (“Bren-Tronics”) and UltraCell, LLC (“UltraCell”), a Delaware limited liability company and a direct wholly owned subsidiary of Bren-Tronics.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">UltraCell LLC was renamed to Advent Technologies LLC following its acquisition by the Company.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On June 25, 2021, the Company entered into a Share Purchase Agreement, with F.E.R. fischer Edelstahlrohre GmbH, a limited liability company incorporated under the Laws of Germany (the “Seller”) to acquire all of the issued and outstanding equity interests in SerEnergy A/S, a Danish stock corporation and a wholly-owned subsidiary of the Seller (“SerEnergy”) and fischer eco solutions GmbH, a German limited liability company and a wholly-owned subsidiary of the Seller (“FES”) together with certain outstanding shareholder loan receivables.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">SerEnergy and FES were renamed to Advent Technologies A/S and Advent Technologies GmbH, respectively, following their acquisition by the Company on August 31, 2021.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The unaudited condensed consolidated financial statements of the Company have been prepared to reflect the consolidation of the companies listed below:</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <table cellpadding="0" cellspacing="0" id="xdx_885_ecustom--SubsidiariesInConsolidationTableTextBlock_pn3n3_zwFBqGDgZA8h" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Basis of presentation (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_8B8_zrKhH5Q7yNnh" style="display: none">Schedule of subsidiaries in consolidation</span></td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td></tr> <tr style="vertical-align: bottom"> <td style="vertical-align: bottom; font-weight: bold; text-align: left"> </td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="font-weight: bold; text-align: center">Country of</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Ownership Interest</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Statements of Operations</td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; vertical-align: bottom; font-weight: bold; text-align: left">Company Name</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Incorporation</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Direct</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Indirect</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2024</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2023</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; width: 41%; text-align: left"><span id="xdx_904_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Company Name">Advent Technologies, Inc.</span></td><td style="text-align: center; width: 1%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_900_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Country of Incorporation">USA</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0571">-</span></span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90A_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_907_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Company Name">Advent Technologies S.A.</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_906_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Country of Incorporation">Greece</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0581">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_901_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Company Name">Advent Technologies LLC</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90B_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Country of Incorporation">USA</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_901_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0593">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90D_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_90B_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Company Name">Advent Technologies GmbH</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_900_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Country of Incorporation">Germany</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0607">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_907_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Company Name">Advent Technologies A/S</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_906_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Country of Incorporation">Denmark</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0619">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90E_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left"><span id="xdx_90D_ecustom--NameOfSubsidiary_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Company Name">Advent Green Energy Philippines, Inc</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--SubsidiaryPlaceOfIncorporation_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Country of Incorporation">Philippines</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest"><span style="-sec-ix-hidden: xdx2ixbrl0629">-</span></span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--StatementsOfOperationsDate_c20240101__20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90B_ecustom--StatementsOfOperationsDate_c20230101__20230331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember" title="Statements of Operations date">01/01 – 3/31</span></td></tr> </table> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company has limited financial information, for the period January 1, 2024, through March 31, 2024, including the statement of operation information for Advent Technologies A/S, its wholly owned subsidiary Advent Green Energy Philippines, Inc. and Advent Technologies GmbH due to the bankruptcy of Advent Technologies A/S and the related loss of access to the underlying accounting records and access to Company finance personnel. The Company estimated changes in balance sheet accounts, revenue and expenses based upon bank statements and internal management reporting. The subsidiaries do not qualify for discontinued operations until Q3 2024.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; text-align: justify; margin-top: 0pt; margin-bottom: 0pt"><b><i>Unaudited Condensed Consolidated Financial Statements</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”). The unaudited financial information reflects, in the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. The results reported for the interim period presented are not necessarily indicative of results that may be expected for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023, included in the Annual Report on Form 10-K filed with the SEC on August 13, 2024. We reclassified certain prior year amounts in our consolidated financial statements to conform to the current year presentation.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Share and per share amounts are presented on a post-conversion basis for all periods presented, unless otherwise specified.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i>Going Concern</i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The accompanying unaudited condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern. The Company considers that the going concern basis is appropriate for the preparation of its unaudited condensed consolidated financial statements, as it is pursuing additional fund raising as disclosed below and has no intentions to proceed with liquidation. The going concern basis of presentation assumes that the Company will continue in operation one year from the date these unaudited condensed consolidated financial statements are issued and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. As such, the accompanying unaudited condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Following the significant non adjusting subsequent events of Advent Technologies A/S bankruptcy and the termination of the Hood Park lease agreement, the Company presents a Proforma Consolidated Balance Sheet as at March 31, 2024 and December 31, 2023 in the Note 22 to the consolidated financial statements to reflect the impact of those events.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern for one year from the date that the unaudited condensed consolidated financial statements are issued. The Company’s ability to meet its liquidity needs will largely depend on its ability to generate cash in the future. During the three months ended March 31, 2024, the Company used $2.9 <span id="xdx_90C_eus-gaap--NetCashProvidedByUsedInOperatingActivities_pn3n3_c20240101__20240331_zkMI3IEltRcd" style="display: none" title="Net cash used in operating activities">(2,876)</span> million of cash in operating activities, and the Company’s ability to generate cash in the future is subject to general economic, financial, competitive, legislative, regulatory, and other factors that are beyond the Company’s control. Furthermore, the Company has suffered recurring operating losses and has a negative net working capital position of $<span id="xdx_907_ecustom--NegativeNetWorkingCapital_iI_pn3n3_dm_c20240331_zO63Dxe7DQWk" title="Negative net working capital">10.0</span> million as of March 31, 2024. In addition, as of the issuance date of these unaudited condensed consolidated financial statements the Company is overdue in a number of its obligations which could give the right to creditors at any time from the issuance date of these consolidated financial statements to raise legal action against the Company which in turn could potentially lead to liquidation action against the Company and/or its subsidiaries. The transition to profitability and positive cash flow is highly dependent upon the successful development, approval, and commercialization of the Company’s products and the achievement of a revenue level adequate to support its cost structure and the Company can give no assurances that this will occur. Based on the Company’s current operating plan, the Company believes that its cash and cash equivalents as of March 31, 2024, of $<span id="xdx_90B_eus-gaap--CashAndCashEquivalentsAtCarryingValue_iI_pn3n3_dm_c20240331__us-gaap--CashAndCashEquivalentsAxis__us-gaap--CashEquivalentsMember_zGCxC6BrvP58" title="Cash and cash equivalents">0.8</span> million and $<span id="xdx_901_eus-gaap--CashAndCashEquivalentsAtCarryingValue_iI_pn3n3_dm_c20240925__us-gaap--CashAndCashEquivalentsAxis__us-gaap--CashEquivalentsMember_zmfp1iGaUtSi" title="Cash and cash equivalents">0.5</span> million as of September 25, 2024, are not sufficient to fund operations and capital expenditures for the twelve months following the filing of this Quarterly Report on Form 10-Q, and the Company will need to obtain additional funding in the very near term, otherwise the Company may immediately substantially curtail or terminate its operations.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company performed a cash flow projection on a monthly basis for the twelve-month period following the issuance of the consolidated financial statements. With regards to the cash flow projections, the projected inflows from revenues and grants will be insufficient to cover the projected outflows, as such, the Company will continue to have a negative net working capital position and a delay in the projected timing of the short term financing and inflows and/or an immediate demand by creditors of repayment of the long outstanding payables may result in the Company being insolvent and short of cash at any specific time over the coming weeks and over the next twelve months.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The highlights of the projections are as follows:</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Company projects cash inflows from contracted revenues and grants for which it has already signed agreements with third parties and estimates projected outflows assuming the effective implementation of the Company’s plans to reduce monthly expenditures gradually during 2024.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The cash flow projections do not include any cash inflows or outflows from Advent Technologies A/S which was declared bankrupt by the court in Aalborg, Denmark on July 25, 2024, and its wholly owned subsidiary Green Energy Philippines, Inc. The Company did not include any outflows relating to Advent Technologies A/S, since it believes that the bankruptcy of its subsidiary, will not have any material effect, except for a potential claim of approximately $0.5 million from a supplier contract for which the parent company Advent Technologies Holdings, Inc. is the guarantor.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In addition, the projections do not include any cash outflows relating to commitments and contingencies as disclosed in Note 20 to the unaudited condensed consolidated financial statements, since the Company believes that any cash outflows relating to these commitments will not materialize based on the Company’s plans to agree the termination of such contracts with its suppliers and a contingent loss as outcome of the pending arbitration it is not probable.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Until such time as the Company generates sufficient revenue to fund its operations (if ever), the Company plans to finance its operations and repay its existing and future liabilities and other obligations through the sale of equity and/or debt securities and, to the extent available, short-term and long-term loans. As part of its plan, on July 30, 2024, the Company entered into a securities purchase agreement, (the “Purchase Agreement”), with an institutional investor (the “Investor”) pursuant to which, at the closing, defined as the filing date of the Company’s 10-K, the Company will issue to the Investor a senior promissory note in the principal amount of $1 million (the “Senior Note”), repayable within one year and bearing interest of 18%. The Company has not yet closed on the $1 million financing and no loan proceeds have yet been received by the Company. However, the Company and the Investor are working together to close this financing as soon as possible. The Investor has also committed to provide the Company with a one-year revolving line of credit for an aggregate maximum principal amount of $2 million, again bearing interest of 18% (the two debt transactions are referred to as the “Financing”). The $2 million financing is contingent upon the Company’s filing of a Registration Statement on Form S-1 with the Securities and Exchange Commission with respect to an underwritten or “best efforts” public offering by the Company of its common stock, and/or common stock equivalents registered under the Securities Act of 1933, as amended for proceeds to the Company of not less than $5 million (a “Qualified Public Equity Offering”). The Company can give no assurances as of the date of issuance of the consolidated financial statements as to whether the Company will be successful in raising this Financing and executing a Qualified Public Equity Offering. The Company will use the proceeds from the Financing for general corporate purposes, including expenses related to the preparation of its Quarterly Report on Form 10-Q for the three months ended March 31, 2024, and expenses to facilitate a Qualified Public Equity Offering and the proceeds of the Qualified Public Equity Offering for general corporate purposes.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">With regards to the projected revenues and grants, a delay in the projected timing of inflows may result in the Company remaining insolvent and short of cash at any specific time over the next twelve months. Also, there is no guarantee that the Company’s plans to reduce monthly expenditures will be successful. Beyond that, there is no guarantee about when the Registration Statement in Form S-1 will be filed and therefore the committed one-year revolving line of credit of maximum $2 million will be received. In addition, there is no guarantee with regards to the Company’s ability to secure proceeds of not less than $5 million from the Qualified Public Entity Offering.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">If the Company is unable to obtain sufficient funding, it could be required to delay its development efforts, limit activities, and further reduce research and development costs, which could adversely affect its business prospects and delivery of contractual obligations. A cash shortfall at any point in time over the next twelve months could result in the Company failing to meet its overdue and current obligations which could trigger action against the Company and/or its subsidiaries for liquidation by employees, authorities, or creditors. Because of the uncertainty in securing additional funding, delays in growth of revenue, failure to materialize cost-cutting efforts and the insufficient amount of cash and cash equivalents as of the consolidated financial statement filing date, management has concluded that substantial doubt exists with respect to the Company’s ability to continue as a going concern for one year from the date the unaudited condensed consolidated financial statements are issued.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p>
CY2024Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2876000	usd
CY2024Q1	adn	Negative Net Working Capital NegativeNetWorkingCapital	10000000.0	usd
CY2024Q1	us-gaap	Use Of Estimates UseOfEstimates	<p id="xdx_842_eus-gaap--UseOfEstimates_zmR0QRtBe7Sj" style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i><span id="xdx_86E_zFBlSmnTQzec">Use of Estimates</span></i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. On an on-going basis, management evaluates the estimates and judgments, including those related to the selection of useful lives for tangible assets, expected future cash flows from long-lived assets to support impairment tests, the carrying value of goodwill, provisions necessary for accounts receivables and inventory write downs, provisions for legal disputes, and contingencies. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates under different assumptions and/or conditions.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p>
CY2024Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2876000	usd
CY2024Q1	adn	Negative Net Working Capital NegativeNetWorkingCapital	10000000.0	usd
CY2024Q1	us-gaap	Use Of Estimates UseOfEstimates	<p id="xdx_842_eus-gaap--UseOfEstimates_zmR0QRtBe7Sj" style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><b><i><span id="xdx_86E_zFBlSmnTQzec">Use of Estimates</span></i></b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. On an on-going basis, management evaluates the estimates and judgments, including those related to the selection of useful lives for tangible assets, expected future cash flows from long-lived assets to support impairment tests, the carrying value of goodwill, provisions necessary for accounts receivables and inventory write downs, provisions for legal disputes, and contingencies. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates under different assumptions and/or conditions.</p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0"> </p>
CY2024Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	900000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	900000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3562000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	100000	usd
CY2024Q1	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	750000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	750000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1622000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4412000	usd
CY2024Q1	adn	Period Of Warranty On Fuel Cells PeriodOfWarrantyOnFuelCells	P2Y
CY2024Q1	adn	Percentage Of Accrue Warranty Reserve PercentageOfAccrueWarrantyReserve	0.08	pure
CY2024Q1	adn	Period Of Warranty Reserve Expected To Be Incurred PeriodOfWarrantyReserveExpectedToBeIncurred	P12M
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	911000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	1048000	usd
CY2023Q1	adn	Additions Additions	20000	usd
CY2023Q1	adn	Settlements Settlements	-113000	usd
CY2023Q1	adn	Foreign Exchange Fluctuations ForeignExchangeFluctuations	17000	usd
CY2024Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	894000	usd
CY2023Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	972000	usd
CY2024Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	900000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	900000	usd
CY2024Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	774000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3562000	usd
CY2024Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	98000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	100000	usd
CY2024Q1	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	750000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	750000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1622000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4412000	usd
CY2024Q1	adn	Period Of Warranty On Fuel Cells PeriodOfWarrantyOnFuelCells	P2Y
CY2024Q1	adn	Percentage Of Accrue Warranty Reserve PercentageOfAccrueWarrantyReserve	0.08	pure
CY2024Q1	adn	Period Of Warranty Reserve Expected To Be Incurred PeriodOfWarrantyReserveExpectedToBeIncurred	P12M
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	911000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	1048000	usd
CY2023Q1	adn	Additions Additions	20000	usd
CY2023Q1	adn	Settlements Settlements	-113000	usd
CY2024Q1	adn	Foreign Exchange Fluctuations ForeignExchangeFluctuations	-17000	usd
CY2023Q1	adn	Foreign Exchange Fluctuations ForeignExchangeFluctuations	17000	usd
CY2023Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	972000	usd
CY2024Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	7000	usd
CY2023Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	7000	usd
CY2024Q1	adn	Outstanding Balances With Related Parties OutstandingBalancesWithRelatedParties	0	usd
CY2023Q4	adn	Outstanding Balances With Related Parties OutstandingBalancesWithRelatedParties	0	usd
CY2024Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	7000	usd
CY2023Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	7000	usd
CY2024Q1	adn	Outstanding Balances With Related Parties OutstandingBalancesWithRelatedParties	0	usd
CY2023Q4	adn	Outstanding Balances With Related Parties OutstandingBalancesWithRelatedParties	0	usd
CY2024Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1442000	usd
CY2023Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	552000	usd
CY2024Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	357000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	361000	usd
CY2024Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1442000	usd
CY2023Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	552000	usd
CY2024Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	357000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	361000	usd
CY2024Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1085000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	191000	usd
CY2024Q1	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	8813000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	9461000	usd
CY2024Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	360000	usd
CY2023Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	223000	usd
CY2024Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5175000	usd
CY2023Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5275000	usd
CY2024Q1	us-gaap	Inventory Gross InventoryGross	14348000	usd
CY2023Q4	us-gaap	Inventory Gross InventoryGross	14959000	usd
CY2024Q1	adn	Provision For Inventory ProvisionForInventory	12271000	usd
CY2023Q4	adn	Provision For Inventory ProvisionForInventory	12252000	usd
CY2024Q1	us-gaap	Inventory Net InventoryNet	2077000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	2707000	usd
CY2023Q4	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-12252000	usd
CY2022Q4	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-232000	usd
CY2024Q1	adn	Provision For Slow Moving Inventory Additions ProvisionForSlowMovingInventoryAdditions	-239000	usd
CY2024Q1	adn	Provision For Slow Moving Inventory Foreign Exchange Fluctuations ProvisionForSlowMovingInventoryForeignExchangeFluctuations	220000	usd
CY2023Q1	adn	Provision For Slow Moving Inventory Foreign Exchange Fluctuations ProvisionForSlowMovingInventoryForeignExchangeFluctuations	-4000	usd
CY2024Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1085000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	191000	usd
CY2024Q1	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	8813000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	9461000	usd
CY2024Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	360000	usd
CY2023Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	223000	usd
CY2024Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5175000	usd
CY2023Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5275000	usd
CY2023Q4	us-gaap	Inventory Gross InventoryGross	14959000	usd
CY2024Q1	adn	Provision For Inventory ProvisionForInventory	12271000	usd
CY2023Q4	adn	Provision For Inventory ProvisionForInventory	12252000	usd
CY2024Q1	us-gaap	Inventory Net InventoryNet	2077000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	2707000	usd
CY2023Q4	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-12252000	usd
CY2022Q4	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-232000	usd
CY2024Q1	adn	Provision For Slow Moving Inventory Additions ProvisionForSlowMovingInventoryAdditions	-239000	usd
CY2024Q1	adn	Provision For Slow Moving Inventory Foreign Exchange Fluctuations ProvisionForSlowMovingInventoryForeignExchangeFluctuations	220000	usd
CY2023Q1	adn	Provision For Slow Moving Inventory Foreign Exchange Fluctuations ProvisionForSlowMovingInventoryForeignExchangeFluctuations	-4000	usd
CY2024Q1	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-12271000	usd
CY2023Q1	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-236000	usd
CY2024Q1	adn	Schedule Of Prepaid Expenses ScheduleOfPrepaidExpenses	<table cellpadding="0" cellspacing="0" id="xdx_89B_ecustom--ScheduleOfPrepaidExpenses_pn3n3_zxnNFg1OwSz1" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Prepaid expenses and other current assets (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left"><span id="xdx_8B4_zSAsn7YxBw43" style="display: none">Schedule of prepaid expenses</span></td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_490_20240331" style="text-align: right"> </td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_497_20231231" style="text-align: right"> </td> <td style="text-align: left"> </td></tr> <tr style="vertical-align: bottom"> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; text-align: center"><span style="font: normal 10pt Times New Roman, Times, Serif"><b>March 31,<br/> 2024</b></span></td> <td style="padding-bottom: 1pt"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">December 31,<br/> 2023</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; text-align: left">(Amounts in thousands)</td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center"><span style="font-weight: normal"> (Unaudited)</span></td> <td style="padding-bottom: 1pt; font-weight: bold"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="font-weight: bold; text-align: center"> </td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidInsurance_iI_pn3n3_maPECzRiQ_zZnvxRPZMbB5" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; width: 76%; text-align: left">Prepaid insurance expenses</td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">1,093</td> <td style="width: 1%; text-align: left"> </td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">155</td> <td style="width: 1%; text-align: left"> </td></tr> <tr id="xdx_400_ecustom--PrepaidResearch_iI_pn3n3_maPECzRiQ_zXhnrXdswTu4" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Prepaid research expenses</td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">13</td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">36</td> <td style="text-align: left"> </td></tr> <tr id="xdx_401_eus-gaap--OtherPrepaidExpenseCurrent_iI_pn3n3_maPECzRiQ_zo41I1jrnE73" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left; padding-bottom: 1pt">Other prepaid expenses</td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">957</td> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">958</td> <td style="padding-bottom: 1pt; text-align: left"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidExpenseCurrent_iTI_pn3n3_mtPECzRiQ_zH8IAEc2ivl1" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; font-weight: bold; text-align: left; padding-bottom: 2.5pt">Total</td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">2,063</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">1,149</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td></tr> </table>
CY2024Q1	us-gaap	Prepaid Insurance PrepaidInsurance	1093000	usd
CY2024Q1	adn	Prepaid Research PrepaidResearch	13000	usd
CY2024Q1	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-12271000	usd
CY2023Q1	adn	Change In Provision For Slow Moving Inventory Balance At Beginning ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning	-236000	usd
CY2024Q1	adn	Schedule Of Prepaid Expenses ScheduleOfPrepaidExpenses	<table cellpadding="0" cellspacing="0" id="xdx_89B_ecustom--ScheduleOfPrepaidExpenses_pn3n3_zxnNFg1OwSz1" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Prepaid expenses and other current assets (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left"><span id="xdx_8B4_zSAsn7YxBw43" style="display: none">Schedule of prepaid expenses</span></td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_490_20240331" style="text-align: right"> </td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_497_20231231" style="text-align: right"> </td> <td style="text-align: left"> </td></tr> <tr style="vertical-align: bottom"> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; text-align: center"><span style="font: normal 10pt Times New Roman, Times, Serif"><b>March 31,<br/> 2024</b></span></td> <td style="padding-bottom: 1pt"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">December 31,<br/> 2023</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; text-align: left">(Amounts in thousands)</td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center"><span style="font-weight: normal"> (Unaudited)</span></td> <td style="padding-bottom: 1pt; font-weight: bold"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="font-weight: bold; text-align: center"> </td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidInsurance_iI_pn3n3_maPECzRiQ_zZnvxRPZMbB5" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; width: 76%; text-align: left">Prepaid insurance expenses</td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">1,093</td> <td style="width: 1%; text-align: left"> </td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">155</td> <td style="width: 1%; text-align: left"> </td></tr> <tr id="xdx_400_ecustom--PrepaidResearch_iI_pn3n3_maPECzRiQ_zXhnrXdswTu4" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Prepaid research expenses</td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">13</td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">36</td> <td style="text-align: left"> </td></tr> <tr id="xdx_401_eus-gaap--OtherPrepaidExpenseCurrent_iI_pn3n3_maPECzRiQ_zo41I1jrnE73" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left; padding-bottom: 1pt">Other prepaid expenses</td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">957</td> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">958</td> <td style="padding-bottom: 1pt; text-align: left"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidExpenseCurrent_iTI_pn3n3_mtPECzRiQ_zH8IAEc2ivl1" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; font-weight: bold; text-align: left; padding-bottom: 2.5pt">Total</td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">2,063</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">1,149</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td></tr> </table>
CY2024Q1	us-gaap	Prepaid Insurance PrepaidInsurance	1093000	usd
CY2023Q4	us-gaap	Prepaid Insurance PrepaidInsurance	155000	usd
CY2024Q1	adn	Prepaid Research PrepaidResearch	13000	usd
CY2023Q4	adn	Prepaid Research PrepaidResearch	36000	usd
CY2024Q1	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	957000	usd
CY2023Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	958000	usd
CY2024Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2063000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1149000	usd
CY2024Q1	us-gaap	Value Added Tax Receivable ValueAddedTaxReceivable	290000	usd
CY2023Q4	us-gaap	Value Added Tax Receivable ValueAddedTaxReceivable	273000	usd
CY2024Q1	adn	Withholding Tax WithholdingTax	20000	usd
CY2023Q4	adn	Withholding Tax WithholdingTax	20000	usd
CY2024Q1	us-gaap	Grants Receivable GrantsReceivable	559000	usd
CY2023Q4	us-gaap	Grants Receivable GrantsReceivable	570000	usd
CY2023Q4	adn	Purchases Under Receipt PurchasesUnderReceipt	1000	usd
CY2024Q1	adn	Guarantees Guarantees	9000	usd
CY2023Q4	adn	Guarantees Guarantees	9000	usd
CY2024Q1	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	107000	usd
CY2023Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	152000	usd
CY2024Q1	adn	Accrued Sublease Income AccruedSubleaseIncome	130000	usd
CY2023Q4	adn	Accrued Sublease Income AccruedSubleaseIncome	80000	usd
CY2024Q1	adn	Accrued Interest Income AccruedInterestIncome	6000	usd
CY2024Q1	us-gaap	Other Assets Current OtherAssetsCurrent	1121000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1105000	usd
CY2024Q1	us-gaap	Indefinitelived Intangible Assets Acquired IndefinitelivedIntangibleAssetsAcquired	406000	usd
CY2024Q1	adn	Impairment Of Intangible Asset Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill	-406000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	24328000	usd
CY2023Q4	adn	Prepaid Research PrepaidResearch	36000	usd
CY2024Q1	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	957000	usd
CY2023Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	958000	usd
CY2024Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	2063000	usd
CY2024Q1	us-gaap	Value Added Tax Receivable ValueAddedTaxReceivable	290000	usd
CY2023Q4	us-gaap	Value Added Tax Receivable ValueAddedTaxReceivable	273000	usd
CY2024Q1	adn	Withholding Tax WithholdingTax	20000	usd
CY2023Q4	adn	Withholding Tax WithholdingTax	20000	usd
CY2024Q1	us-gaap	Grants Receivable GrantsReceivable	559000	usd
CY2023Q4	us-gaap	Grants Receivable GrantsReceivable	570000	usd
CY2023Q4	adn	Purchases Under Receipt PurchasesUnderReceipt	1000	usd
CY2024Q1	adn	Guarantees Guarantees	9000	usd
CY2023Q4	adn	Guarantees Guarantees	9000	usd
CY2024Q1	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	107000	usd
CY2023Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	152000	usd
CY2024Q1	adn	Accrued Sublease Income AccruedSubleaseIncome	130000	usd
CY2023Q4	adn	Accrued Sublease Income AccruedSubleaseIncome	80000	usd
CY2024Q1	adn	Accrued Interest Income AccruedInterestIncome	6000	usd
CY2024Q1	us-gaap	Other Assets Current OtherAssetsCurrent	1121000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1105000	usd
CY2024Q1	us-gaap	Indefinitelived Intangible Assets Acquired IndefinitelivedIntangibleAssetsAcquired	406000	usd
CY2024Q1	adn	Impairment Of Intangible Asset Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill	-406000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	24328000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-4682000	usd
CY2024Q1	adn	Cumulative Impairment CumulativeImpairment	-19569000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	77000	usd
CY2024Q1	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	24734000	usd
CY2024Q1	adn	Intangible Assets Gross Excluding Goodwill Accumulated Amortization IntangibleAssetsGrossExcludingGoodwillAccumulatedAmortization	-4682000	usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Securities Noncurrent

AvailableForSaleSecuritiesDebtSecuritiesNoncurrent

usd

CY2023Q4

adn

Loss Contingency Liabilities

LossContingencyLiabilities

usd

CY2024Q1

us-gaap

Derivative Liabilities Noncurrent

DerivativeLiabilitiesNoncurrent

usd

CY2023Q4

us-gaap

Common Stock Value

CommonStockValue

usd

CY2023Q4

us-gaap

Preferred Stock Value

PreferredStockValue

usd

CY2023Q1

us-gaap

Operating Leases Rent Expense Sublease Rentals1

OperatingLeasesRentExpenseSubleaseRentals1

usd

CY2023Q1

adn

Loss Contingency

LossContingency

usd

CY2024Q1

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

usd

CY2023Q1

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

usd

CY2023Q1

us-gaap

Litigation Settlement Expense

LitigationSettlementExpense

usd

CY2023Q1

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

usd

CY2023Q1

adn

Provision For Inventories

ProvisionForInventories

usd

CY2023Q1

us-gaap

Increase Decrease In Deferred Revenue

IncreaseDecreaseInDeferredRevenue

usd

CY2023Q1

adn

Increase In Loss Contingency Liability

IncreaseInLossContingencyLiability

usd

CY2024Q1

us-gaap

Increase Decrease In Other Noncurrent Liabilities

IncreaseDecreaseInOtherNoncurrentLiabilities

usd

CY2024Q1

adn

Payments To Acquire Fixed Assets

PaymentsToAcquireFixedAssets

usd

CY2023Q1

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

usd

CY2023Q4

us-gaap

Other Liabilities Noncurrent

OtherLiabilitiesNoncurrent

684000

usd

CY2023Q4

us-gaap

Liabilities Noncurrent

LiabilitiesNoncurrent

9376000

usd

CY2024Q1

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

500000000

shares

CY2023Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

500000000

shares

CY2024Q1

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2605135

shares

CY2024Q1

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2605135

shares

CY2024Q1

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

1000000

shares

CY2024Q1

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2024Q1

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2023Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2023Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2023Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

194941000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

13448000

usd

CY2023Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

34737000

usd

CY2024Q1

us-gaap

Cost Of Goods And Services Sold

CostOfGoodsAndServicesSold

1019000

usd

CY2024Q1

us-gaap

Gross Profit

GrossProfit

2432000

usd

CY2023Q1

us-gaap

Gross Profit

GrossProfit

-507000

usd

CY2024Q1

adn

Income From Grant

IncomeFromGrant

1437000

usd

CY2023Q1

adn

Income From Grant

IncomeFromGrant

534000

usd

CY2024Q1

us-gaap

Research And Development Expense

ResearchAndDevelopmentExpense

1415000

usd

CY2023Q1

us-gaap

Research And Development Expense

ResearchAndDevelopmentExpense

3141000

usd

CY2024Q1

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

6903000

usd

CY2023Q1

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

8489000

usd

CY2024Q1

us-gaap

Operating Leases Rent Expense Sublease Rentals1

OperatingLeasesRentExpenseSubleaseRentals1

145000

usd

CY2024Q1

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

1000

usd

CY2023Q1

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

221000

usd

CY2023Q1

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

usd

CY2023Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

usd

CY2024Q1

adn

Additions

usd

CY2024Q1

adn

Settlements

usd

CY2023Q1

adn

Provision For Slow Moving Inventory Additions

ProvisionForSlowMovingInventoryAdditions

usd

CY2024Q1

adn

Purchases Under Receipt

PurchasesUnderReceipt

usd

CY2023Q4

adn

Accrued Interest Income

AccruedInterestIncome

usd

CY2024Q1

adn

Contractual Obligation Quantity Pieces Year Two

ContractualObligationQuantityPiecesYearTwo

integer

CY2023Q4

us-gaap

Goodwill

usd

CY2023Q4

adn

Available For Sale Financial Asset

AvailableForSaleFinancialAsset

usd

CY2023Q4

us-gaap

Common Stock Value

CommonStockValue

usd

CY2023Q4

us-gaap

Preferred Stock Value

PreferredStockValue

usd

CY2024Q1

adn

Available For Sale Financial Asset

AvailableForSaleFinancialAsset

usd

CY2024Q1

adn

Warrant Liability

WarrantLiability

usd

CY2024Q1

us-gaap

Common Stock Value

CommonStockValue

usd

CY2024Q1

us-gaap

Preferred Stock Value

PreferredStockValue

usd

CY2024Q1

dei

Entity Address Address Line1

EntityAddressAddressLine1

5637 La Ribera St.

CY2024Q1

dei

Entity Address Address Line2

EntityAddressAddressLine2

Suite A

CY2024Q1

dei

Entity Address City Or Town

EntityAddressCityOrTown

Livermore

CY2024Q1

dei

Entity Address State Or Province

EntityAddressStateOrProvince

CA

CY2024Q1

dei

Entity Address Postal Zip Code

EntityAddressPostalZipCode

94550

CY2024Q1

dei

City Area Code

CityAreaCode

(925)

CY2024Q1

dei

Local Phone Number

LocalPhoneNumber

455-9400

CY2024Q1

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

No

CY2024Q1

dei

Entity Interactive Data Current

EntityInteractiveDataCurrent

No

CY2024Q1

dei

Entity Filer Category

EntityFilerCategory

Non-accelerated Filer

CY2024Q1

dei

Entity Small Business

EntitySmallBusiness

true

CY2024Q1

dei

Entity Emerging Growth Company

EntityEmergingGrowthCompany

false

CY2024Q1

dei

Entity Shell Company

EntityShellCompany

false

CY2024Q4

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

2636508

shares

CY2024Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

774000

usd

CY2023Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

3562000

usd

CY2024Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

98000

usd

CY2023Q4

us-gaap

Restricted Cash Current

RestrictedCashCurrent

100000

usd

CY2024Q1

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

1085000

usd

CY2023Q4

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

191000

usd

CY2024Q1

us-gaap

Contract With Customer Asset Net Current

ContractWithCustomerAssetNetCurrent

11000

usd

CY2023Q4

us-gaap

Contract With Customer Asset Net Current

ContractWithCustomerAssetNetCurrent

21000

usd

CY2024Q1

us-gaap

Inventory Net

InventoryNet

2077000

usd

CY2023Q4

us-gaap

Inventory Net

InventoryNet

2707000

usd

CY2024Q1

us-gaap

Prepaid Expense And Other Assets Current

PrepaidExpenseAndOtherAssetsCurrent

3184000

usd

CY2023Q4

us-gaap

Prepaid Expense And Other Assets Current

PrepaidExpenseAndOtherAssetsCurrent

2254000

usd

CY2023Q4

us-gaap

Assets Current

AssetsCurrent

8835000

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

79000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

21549000

usd

CY2023Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

3216000

usd

CY2023Q4

us-gaap

Restricted Cash Noncurrent

RestrictedCashNoncurrent

750000

usd

CY2023Q4

us-gaap

Other Assets Noncurrent

OtherAssetsNoncurrent

308000

usd

CY2024Q1

us-gaap

Assets Noncurrent

AssetsNoncurrent

24923000

usd

CY2023Q4

us-gaap

Assets Noncurrent

AssetsNoncurrent

25902000

usd

CY2024Q1

us-gaap

Assets

32152000

usd

CY2023Q4

us-gaap

Assets

34737000

usd

CY2024Q1

us-gaap

Accounts Payable Current

AccountsPayableCurrent

5679000

usd

CY2023Q4

us-gaap

Accounts Payable Current

AccountsPayableCurrent

5087000

usd

CY2024Q1

us-gaap

Deferred Income Current

DeferredIncomeCurrent

7000

usd

CY2023Q4

us-gaap

Deferred Income Current

DeferredIncomeCurrent

530000

usd

CY2024Q1

us-gaap

Contract With Customer Liability Current

ContractWithCustomerLiabilityCurrent

2280000

usd

CY2023Q4

us-gaap

Contract With Customer Liability Current

ContractWithCustomerLiabilityCurrent

2015000

usd

CY2024Q1

adn

Loss Contingency Liabilities

LossContingencyLiabilities

5140000

usd

CY2024Q1

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1816000

usd

CY2023Q4

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1916000

usd

CY2024Q1

us-gaap

Operating Lease Liability Current

OperatingLeaseLiabilityCurrent

2164000

usd

CY2023Q4

us-gaap

Operating Lease Liability Current

OperatingLeaseLiabilityCurrent

2186000

usd

CY2024Q1

us-gaap

Accrued Income Taxes Current

AccruedIncomeTaxesCurrent

176000

usd

CY2023Q4

us-gaap

Accrued Income Taxes Current

AccruedIncomeTaxesCurrent

179000

usd

CY2024Q1

us-gaap

Liabilities Current

LiabilitiesCurrent

17262000

usd

CY2023Q4

us-gaap

Liabilities Current

LiabilitiesCurrent

11913000

usd

CY2023Q4

us-gaap

Derivative Liabilities Noncurrent

DerivativeLiabilitiesNoncurrent

59000

usd

CY2023Q4

adn

Longterm Operating Lease Liabilities

LongtermOperatingLeaseLiabilities

8230000

usd

CY2023Q4

us-gaap

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

83000

usd

CY2023Q4

us-gaap

Deferred Income Noncurrent

DeferredIncomeNoncurrent

320000

usd

CY2023Q4

us-gaap

Liabilities Noncurrent

LiabilitiesNoncurrent

9376000

usd

CY2024Q1

us-gaap

Liabilities

26073000

usd

CY2023Q4

us-gaap

Liabilities

21289000

usd

CY2024Q1

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.0001

CY2023Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

500000000

shares

CY2023Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

500000000

shares

CY2024Q1

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2605135

shares

CY2024Q1

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2605135

shares

CY2023Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2580159

shares

CY2023Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2580159

shares

CY2024Q1

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.0001

CY2023Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

1000000

shares

CY2023Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

1000000

shares

CY2024Q1

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2024Q1

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2023Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2023Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2024Q1

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

197000000

usd

CY2023Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

194941000

usd

CY2023Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-2334000

usd

CY2023Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

-179159000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

13448000

usd

CY2023Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

34737000

usd

CY2024Q1

us-gaap

Cost Of Goods And Services Sold

CostOfGoodsAndServicesSold

1019000

usd

CY2024Q1

us-gaap

Gross Profit

GrossProfit

2432000

usd

CY2023Q1

us-gaap

Gross Profit

GrossProfit

-507000

usd

CY2024Q1

adn

Income From Grant

IncomeFromGrant

1437000

usd

CY2023Q1

adn

Income From Grant

IncomeFromGrant

534000

usd

CY2024Q1

us-gaap

Research And Development Expense

ResearchAndDevelopmentExpense

1415000

usd

CY2023Q1

us-gaap

Research And Development Expense

ResearchAndDevelopmentExpense

3141000

usd

CY2024Q1

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

6903000

usd

CY2023Q1

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

8489000

usd

CY2024Q1

us-gaap

Operating Leases Rent Expense Sublease Rentals1

OperatingLeasesRentExpenseSubleaseRentals1

145000

usd

CY2024Q1

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

1000

usd

CY2023Q1

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

221000

usd

CY2024Q1

us-gaap

Operating Income Loss

OperatingIncomeLoss

-4305000

usd

CY2023Q1

us-gaap

Operating Income Loss

OperatingIncomeLoss

-11824000

usd

CY2023Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-390000

usd

CY2024Q1

us-gaap

Interest Income Expense Net

InterestIncomeExpenseNet

-232000

usd

CY2023Q1

us-gaap

Interest Income Expense Net

InterestIncomeExpenseNet

110000

usd

CY2024Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-9000

usd

CY2023Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-41000

usd

CY2024Q1

adn

Loss Contingency

LossContingency

4907000

usd

CY2024Q1

us-gaap

Other Nonoperating Income Expense

OtherNonoperatingIncomeExpense

-17000

usd

CY2023Q1

us-gaap

Other Nonoperating Income Expense

OtherNonoperatingIncomeExpense

173000

usd

CY2024Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-9411000

usd

CY2023Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-11192000

usd

CY2024Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

796000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2023Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.92

CY2024Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-3.62

CY2023Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.92

CY2024Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

1733439

shares

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2024Q1

us-gaap

Operating Income Loss

OperatingIncomeLoss

-4305000

usd

CY2023Q1

us-gaap

Operating Income Loss

OperatingIncomeLoss

-11824000

usd

CY2024Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-59000

usd

CY2023Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-390000

usd

CY2024Q1

us-gaap

Interest Income Expense Net

InterestIncomeExpenseNet

-232000

usd

CY2023Q1

us-gaap

Interest Income Expense Net

InterestIncomeExpenseNet

110000

usd

CY2024Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-9000

usd

CY2023Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-41000

usd

CY2024Q1

adn

Loss Contingency

LossContingency

4907000

usd

CY2024Q1

us-gaap

Other Nonoperating Income Expense

OtherNonoperatingIncomeExpense

-17000

usd

CY2024Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-9411000

usd

CY2023Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-11192000

usd

CY2024Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

796000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-3.62

CY2023Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.92

CY2024Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

1733439

shares

CY2024Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-3.62

CY2023Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.92

CY2024Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

1733439

shares

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-72000

usd

CY2023Q1

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

336000

usd

CY2024Q1

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

-72000

usd

CY2023Q1

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

336000

usd

CY2024Q1

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-9428000

usd

CY2023Q1

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-11652000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

13448000

usd

CY2024Q1

us-gaap

Stock Issued During Period Value New Issues

StockIssuedDuringPeriodValueNewIssues

126000

usd

CY2024Q1

us-gaap

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

1933000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2024Q1

us-gaap

Stockholders Equity

StockholdersEquity

6079000

usd

CY2022Q4

us-gaap

Stockholders Equity

StockholdersEquity

64148000

usd

CY2023Q1

us-gaap

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

2572000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2023Q1

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

336000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2024Q1

us-gaap

Depreciation

717000

usd

CY2023Q1

us-gaap

Adjustment For Amortization

AdjustmentForAmortization

221000

usd

CY2024Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-59000

usd

CY2024Q1

us-gaap

Share Based Compensation

ShareBasedCompensation

1933000

usd

CY2023Q1

us-gaap

Share Based Compensation

ShareBasedCompensation

2572000

usd

CY2024Q1

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

797000

usd

CY2024Q1

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

-21000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-72000

usd

CY2023Q1

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

336000

usd

CY2024Q1

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

-72000

usd

CY2023Q1

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

336000

usd

CY2024Q1

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-9428000

usd

CY2023Q1

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-11652000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

13448000

usd

CY2024Q1

us-gaap

Stock Issued During Period Value New Issues

StockIssuedDuringPeriodValueNewIssues

126000

usd

CY2024Q1

us-gaap

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

1933000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2024Q1

us-gaap

Stockholders Equity

StockholdersEquity

6079000

usd

CY2022Q4

us-gaap

Stockholders Equity

StockholdersEquity

64148000

usd

CY2023Q1

us-gaap

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

2572000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2023Q1

us-gaap

Stockholders Equity

StockholdersEquity

55068000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Depreciation

717000

usd

CY2023Q1

us-gaap

Depreciation

401000

usd

CY2024Q1

us-gaap

Adjustment For Amortization

AdjustmentForAmortization

1000

usd

CY2023Q1

us-gaap

Adjustment For Amortization

AdjustmentForAmortization

221000

usd

CY2024Q1

us-gaap

Litigation Settlement Expense

LitigationSettlementExpense

4907000

usd

CY2024Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-59000

usd

CY2023Q1

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

-390000

usd

CY2024Q1

us-gaap

Share Based Compensation

ShareBasedCompensation

1933000

usd

CY2023Q1

us-gaap

Share Based Compensation

ShareBasedCompensation

2572000

usd

CY2024Q1

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

797000

usd

CY2024Q1

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

-21000

usd

CY2024Q1

adn

Provision For Inventories

ProvisionForInventories

239000

usd

CY2024Q1

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

5000

usd

CY2023Q1

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

6000

usd

CY2024Q1

us-gaap

Increase Decrease In Accounts Receivable

IncreaseDecreaseInAccountsReceivable

896000

usd

CY2023Q1

us-gaap

Increase Decrease In Accounts Receivable

IncreaseDecreaseInAccountsReceivable

-463000

usd

CY2024Q1

us-gaap

Increase Decrease In Contract With Customer Asset

IncreaseDecreaseInContractWithCustomerAsset

-9000

usd

CY2023Q1

us-gaap

Increase Decrease In Contract With Customer Asset

IncreaseDecreaseInContractWithCustomerAsset

241000

usd

CY2024Q1

us-gaap

Increase Decrease In Inventories

IncreaseDecreaseInInventories

-348000

usd

CY2023Q1

us-gaap

Increase Decrease In Inventories

IncreaseDecreaseInInventories

1992000

usd

CY2024Q1

us-gaap

Increase Decrease In Prepaid Deferred Expense And Other Assets

IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

910000

usd

CY2023Q1

us-gaap

Increase Decrease In Prepaid Deferred Expense And Other Assets

IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

1566000

usd

CY2024Q1

us-gaap

Increase Decrease In Other Noncurrent Assets

IncreaseDecreaseInOtherNoncurrentAssets

-5000

usd

CY2023Q1

us-gaap

Increase Decrease In Other Noncurrent Assets

IncreaseDecreaseInOtherNoncurrentAssets

-1197000

usd

CY2024Q1

us-gaap

Increase Decrease In Accounts Payable Trade

IncreaseDecreaseInAccountsPayableTrade

625000

usd

CY2023Q1

us-gaap

Increase Decrease In Accounts Payable Trade

IncreaseDecreaseInAccountsPayableTrade

-930000

usd

CY2024Q1

us-gaap

Increase Decrease In Deferred Revenue

IncreaseDecreaseInDeferredRevenue

-632000

usd

CY2024Q1

adn

Increase In Loss Contingency Liability

IncreaseInLossContingencyLiability

233000

usd

CY2024Q1

us-gaap

Increase Decrease In Contract With Customer Liability

IncreaseDecreaseInContractWithCustomerLiability

292000

usd

CY2023Q1

us-gaap

Increase Decrease In Contract With Customer Liability

IncreaseDecreaseInContractWithCustomerLiability

-22000

usd

CY2024Q1

us-gaap

Increase Decrease In Other Current Liabilities

IncreaseDecreaseInOtherCurrentLiabilities

-73000

usd

CY2024Q1

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

5000

usd

CY2023Q1

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

6000

usd

CY2024Q1

us-gaap

Increase Decrease In Accounts Receivable

IncreaseDecreaseInAccountsReceivable

896000

usd

CY2023Q1

us-gaap

Increase Decrease In Accounts Receivable

IncreaseDecreaseInAccountsReceivable

-463000

usd

CY2023Q1

us-gaap

Increase Decrease In Contract With Customer Asset

IncreaseDecreaseInContractWithCustomerAsset

241000

usd

CY2024Q1

us-gaap

Increase Decrease In Inventories

IncreaseDecreaseInInventories

-348000

usd

CY2023Q1

us-gaap

Increase Decrease In Inventories

IncreaseDecreaseInInventories

1992000

usd

CY2024Q1

us-gaap

Increase Decrease In Prepaid Deferred Expense And Other Assets

IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

910000

usd

CY2023Q1

us-gaap

Increase Decrease In Prepaid Deferred Expense And Other Assets

IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

1566000

usd

CY2023Q1

us-gaap

Increase Decrease In Other Noncurrent Assets

IncreaseDecreaseInOtherNoncurrentAssets

-1197000

usd

CY2024Q1

us-gaap

Increase Decrease In Accounts Payable Trade

IncreaseDecreaseInAccountsPayableTrade

625000

usd

CY2023Q1

us-gaap

Increase Decrease In Accounts Payable Trade

IncreaseDecreaseInAccountsPayableTrade

-930000

usd

CY2024Q1

us-gaap

Increase Decrease In Deferred Revenue

IncreaseDecreaseInDeferredRevenue

-632000

usd

CY2024Q1

adn

Increase In Loss Contingency Liability

IncreaseInLossContingencyLiability

233000

usd

CY2024Q1

us-gaap

Increase Decrease In Other Current Liabilities

IncreaseDecreaseInOtherCurrentLiabilities

-73000

usd

CY2023Q1

us-gaap

Increase Decrease In Other Current Liabilities

IncreaseDecreaseInOtherCurrentLiabilities

362000

usd

CY2023Q1

us-gaap

Increase Decrease In Other Noncurrent Liabilities

IncreaseDecreaseInOtherNoncurrentLiabilities

-118000

usd

CY2024Q1

adn

Increase Decrease In Operating Lease Asset And Liabilities

IncreaseDecreaseInOperatingLeaseAssetAndLiabilities

-230000

usd

CY2023Q1

adn

Increase Decrease In Operating Lease Asset And Liabilities

IncreaseDecreaseInOperatingLeaseAssetAndLiabilities

-220000

usd

CY2024Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-2876000

usd

CY2023Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-11448000

usd

CY2024Q1

us-gaap

Payments To Acquire Machinery And Equipment

PaymentsToAcquireMachineryAndEquipment

29000

usd

CY2023Q1

adn

Payments To Acquire Fixed Assets

PaymentsToAcquireFixedAssets

976000

usd

CY2024Q1

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-29000

usd

CY2023Q1

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-1887000

usd

CY2024Q1

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

126000

usd

CY2024Q1

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

126000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-2779000

usd

CY2024Q1

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

-11000

usd

CY2023Q1

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

11000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

4412000

usd

CY2022Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

33619000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

1622000

usd

CY2023Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

20295000

usd

CY2024Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

774000

usd

CY2023Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

19545000

usd

CY2023Q1

us-gaap

Restricted Cash Equivalents Noncurrent

RestrictedCashEquivalentsNoncurrent

750000

usd

CY2024Q1

us-gaap

Restricted Cash And Cash Equivalents

RestrictedCashAndCashEquivalents

1622000

usd

CY2023Q1

us-gaap

Restricted Cash And Cash Equivalents

RestrictedCashAndCashEquivalents

20295000

usd

CY2024Q1

us-gaap

Basis Of Accounting

BasisOfAccounting

1. Basis of presentation Overview Advent Technologies Holdings, Inc. and its subsidiaries (collectively referred to as “Advent” and the “Company”) is an advanced materials and technology development company operating in the fuel cell, methanol, and hydrogen technology space. Advent is a world-leading company in the development of the HT-PEM technology (with more than 150 patents issued, pending, or licensed worldwide). The HT-PEM fuel cell technology developed by Advent enables off-grid power systems to produce clean power from various green fuels (hydrogen, methanol, bio and eMethanol, and renewable natural gas) and to function with higher efficiency at extreme ambient temperatures and in general extreme environmental conditions (humidity, air pollution). Advent’s main operations focus on developing and manufacturing the Membrane Electrode Assembly (MEA), which is the core electrochemical element and the most critical component of the fuel cell. The MEA largely determines lifetime, power density, efficiency, and overall cost of installation and operation for all applications. Advent is working with world-leading market-leading OEMs with the goal of bringing to the market complete fuel cell systems for a range of applications in the stationary power markets (backup, off-grid, and portable power) and the heavy-duty mobility markets (automotive, aviation, marine). Advent has its headquarters in Livermore, California, and the Company has MEA and fuel cell product development facilities in Livermore, California and Patras, Greece. Previously, the Company’s headquarters were located in Boston, Massachusetts. During 2023, the Company decided to consolidate certain of its German operations with its operations in Greece. During June 2024, the Company closed its facilities in Boston, MA, and no longer maintains its facilities in Denmark and the Philippines due to the bankruptcy of Advent Technologies A/S in July 2024, as discussed in Note 22 Subsequent events. On February 4, 2021 (“Closing Date”), AMCI Acquisition Corp. (“AMCI”), consummated the business combination (the “Business Combination”) pursuant to that certain merger agreement (the “Agreement and Plan of Merger”), dated October 12, 2020, by and among AMCI, AMCI Merger Sub Corp., a Delaware corporation and newly formed wholly-owned subsidiary of AMCI (“Merger Sub”), AMCI Sponsor LLC (the “Sponsor”), solely in the capacity as the representative from and after the effective time of the Business Combination for the stockholders of AMCI, Advent Technologies, Inc., a Delaware corporation (“Legacy Advent”), and Vassilios Gregoriou, solely in his capacity as the representative from and after the effective time for the Legacy Advent stockholders (the “Seller Representative”), as amended by Amendment No. 1 and Amendment No. 2 to the Agreement and Plan of Merger, dated as of October 19, 2020 and December 31, 2020, respectively, by and among AMCI, Merger Sub, Sponsor, Legacy Advent, and Seller Representative. In connection with the closing of the Business Combination (the “Closing”), AMCI acquired 100% of the stock of Legacy Advent (as it existed immediately prior to the Closing) and its subsidiaries. On the Closing Date, and in connection with the closing of the Business Combination, AMCI changed its name to Advent Technologies Holdings, Inc. Legacy Advent was deemed the accounting acquirer in the Business Combination based on an analysis of the criteria outlined in Accounting Standards Codification (“ASC”) 805. This determination was primarily based on Legacy Advent’s stockholders prior to the Business Combination having a majority of the voting interests in the combined company, Legacy Advent’s operations comprising the ongoing operations of the combined company, Legacy Advent’s board of directors comprising a majority of the board of directors of the combined company, and Legacy Advent’s senior management comprising the senior management of the combined company. Accordingly, for accounting purposes, the Business Combination was treated as the equivalent of Legacy Advent issuing stock for the net assets of AMCI, accompanied by a recapitalization. The net assets of AMCI are stated at historical cost, with no goodwill or other intangible assets recorded. While AMCI was the legal acquirer in the Business Combination, because Legacy Advent was deemed the accounting acquirer, the historical financial statements of Legacy Advent became the historical financial statements of the combined company, upon the consummation of the Business Combination. As a result, the consolidated financial statements included in this report reflect (i) the historical operating results of Legacy Advent prior to the Business Combination; (ii) the results of the Company (combined results of AMCI and Legacy Advent) following the closing of the Business Combination; (iii) the assets and liabilities of Legacy Advent at their historical cost; and (iv) Company’s equity structure for all periods presented. In accordance with guidance applicable to these circumstances, the equity structure has been restated in all comparative periods up to the Closing Date, to reflect the number of shares of the Company’s common stock, $0.0001 par value per share, issued to Legacy Advent’s stockholders in connection with the recapitalization transaction. As such, the shares and corresponding capital amounts and earnings per share related to Legacy Advent Preferred Stock (“Preferred Series A” and “Preferred Series Seed”) and Legacy Advent common stock prior to the Business Combination have been retroactively restated as shares reflecting the exchange ratio established in the Business Combination Agreement. Activity within the statement of changes in stockholders’ equity / (deficit) for the issuances of Legacy Advent’s Preferred Stock, were also retroactively converted to Legacy Advent common stock. On February 18, 2021, Advent Technologies, Inc. entered into a Membership Interest Purchase Agreement with Bren-Tronics, Inc. (“Bren-Tronics”) and UltraCell, LLC (“UltraCell”), a Delaware limited liability company and a direct wholly owned subsidiary of Bren-Tronics. UltraCell LLC was renamed to Advent Technologies LLC following its acquisition by the Company. On June 25, 2021, the Company entered into a Share Purchase Agreement, with F.E.R. fischer Edelstahlrohre GmbH, a limited liability company incorporated under the Laws of Germany (the “Seller”) to acquire all of the issued and outstanding equity interests in SerEnergy A/S, a Danish stock corporation and a wholly-owned subsidiary of the Seller (“SerEnergy”) and fischer eco solutions GmbH, a German limited liability company and a wholly-owned subsidiary of the Seller (“FES”) together with certain outstanding shareholder loan receivables. SerEnergy and FES were renamed to Advent Technologies A/S and Advent Technologies GmbH, respectively, following their acquisition by the Company on August 31, 2021. The unaudited condensed consolidated financial statements of the Company have been prepared to reflect the consolidation of the companies listed below: <table cellpadding="0" cellspacing="0" id="xdx_885_ecustom--SubsidiariesInConsolidationTableTextBlock_pn3n3_zwFBqGDgZA8h" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Basis of presentation (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Schedule of subsidiaries in consolidation</td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td></tr> <tr style="vertical-align: bottom"> <td style="vertical-align: bottom; font-weight: bold; text-align: left"> </td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="font-weight: bold; text-align: center">Country of</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Ownership Interest</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Statements of Operations</td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; vertical-align: bottom; font-weight: bold; text-align: left">Company Name</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Incorporation</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Direct</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Indirect</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2024</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2023</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; width: 41%; text-align: left">Advent Technologies, Inc.</td><td style="text-align: center; width: 1%"> </td> <td style="width: 10%; text-align: center">USA</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center">01/01 – 3/31</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies S.A.</td><td style="text-align: center"> </td> <td style="text-align: center">Greece</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies LLC</td><td style="text-align: center"> </td> <td style="text-align: center">USA</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_901_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies GmbH</td><td style="text-align: center"> </td> <td style="text-align: center">Germany</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies A/S</td><td style="text-align: center"> </td> <td style="text-align: center">Denmark</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Green Energy Philippines, Inc</td><td style="text-align: center"> </td> <td style="text-align: center">Philippines</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> </table> The Company has limited financial information, for the period January 1, 2024, through March 31, 2024, including the statement of operation information for Advent Technologies A/S, its wholly owned subsidiary Advent Green Energy Philippines, Inc. and Advent Technologies GmbH due to the bankruptcy of Advent Technologies A/S and the related loss of access to the underlying accounting records and access to Company finance personnel. The Company estimated changes in balance sheet accounts, revenue and expenses based upon bank statements and internal management reporting. The subsidiaries do not qualify for discontinued operations until Q3 2024. Unaudited Condensed Consolidated Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”). The unaudited financial information reflects, in the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. The results reported for the interim period presented are not necessarily indicative of results that may be expected for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023, included in the Annual Report on Form 10-K filed with the SEC on August 13, 2024. We reclassified certain prior year amounts in our consolidated financial statements to conform to the current year presentation. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated. Share and per share amounts are presented on a post-conversion basis for all periods presented, unless otherwise specified. Going Concern The accompanying unaudited condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern. The Company considers that the going concern basis is appropriate for the preparation of its unaudited condensed consolidated financial statements, as it is pursuing additional fund raising as disclosed below and has no intentions to proceed with liquidation. The going concern basis of presentation assumes that the Company will continue in operation one year from the date these unaudited condensed consolidated financial statements are issued and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. As such, the accompanying unaudited condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Following the significant non adjusting subsequent events of Advent Technologies A/S bankruptcy and the termination of the Hood Park lease agreement, the Company presents a Proforma Consolidated Balance Sheet as at March 31, 2024 and December 31, 2023 in the Note 22 to the consolidated financial statements to reflect the impact of those events. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern for one year from the date that the unaudited condensed consolidated financial statements are issued. The Company’s ability to meet its liquidity needs will largely depend on its ability to generate cash in the future. During the three months ended March 31, 2024, the Company used $2.9 (2,876) million of cash in operating activities, and the Company’s ability to generate cash in the future is subject to general economic, financial, competitive, legislative, regulatory, and other factors that are beyond the Company’s control. Furthermore, the Company has suffered recurring operating losses and has a negative net working capital position of $10.0 million as of March 31, 2024. In addition, as of the issuance date of these unaudited condensed consolidated financial statements the Company is overdue in a number of its obligations which could give the right to creditors at any time from the issuance date of these consolidated financial statements to raise legal action against the Company which in turn could potentially lead to liquidation action against the Company and/or its subsidiaries. The transition to profitability and positive cash flow is highly dependent upon the successful development, approval, and commercialization of the Company’s products and the achievement of a revenue level adequate to support its cost structure and the Company can give no assurances that this will occur. Based on the Company’s current operating plan, the Company believes that its cash and cash equivalents as of March 31, 2024, of $0.8 million and $0.5 million as of September 25, 2024, are not sufficient to fund operations and capital expenditures for the twelve months following the filing of this Quarterly Report on Form 10-Q, and the Company will need to obtain additional funding in the very near term, otherwise the Company may immediately substantially curtail or terminate its operations. The Company performed a cash flow projection on a monthly basis for the twelve-month period following the issuance of the consolidated financial statements. With regards to the cash flow projections, the projected inflows from revenues and grants will be insufficient to cover the projected outflows, as such, the Company will continue to have a negative net working capital position and a delay in the projected timing of the short term financing and inflows and/or an immediate demand by creditors of repayment of the long outstanding payables may result in the Company being insolvent and short of cash at any specific time over the coming weeks and over the next twelve months. The highlights of the projections are as follows: The Company projects cash inflows from contracted revenues and grants for which it has already signed agreements with third parties and estimates projected outflows assuming the effective implementation of the Company’s plans to reduce monthly expenditures gradually during 2024. The cash flow projections do not include any cash inflows or outflows from Advent Technologies A/S which was declared bankrupt by the court in Aalborg, Denmark on July 25, 2024, and its wholly owned subsidiary Green Energy Philippines, Inc. The Company did not include any outflows relating to Advent Technologies A/S, since it believes that the bankruptcy of its subsidiary, will not have any material effect, except for a potential claim of approximately $0.5 million from a supplier contract for which the parent company Advent Technologies Holdings, Inc. is the guarantor. In addition, the projections do not include any cash outflows relating to commitments and contingencies as disclosed in Note 20 to the unaudited condensed consolidated financial statements, since the Company believes that any cash outflows relating to these commitments will not materialize based on the Company’s plans to agree the termination of such contracts with its suppliers and a contingent loss as outcome of the pending arbitration it is not probable. Until such time as the Company generates sufficient revenue to fund its operations (if ever), the Company plans to finance its operations and repay its existing and future liabilities and other obligations through the sale of equity and/or debt securities and, to the extent available, short-term and long-term loans. As part of its plan, on July 30, 2024, the Company entered into a securities purchase agreement, (the “Purchase Agreement”), with an institutional investor (the “Investor”) pursuant to which, at the closing, defined as the filing date of the Company’s 10-K, the Company will issue to the Investor a senior promissory note in the principal amount of $1 million (the “Senior Note”), repayable within one year and bearing interest of 18%. The Company has not yet closed on the $1 million financing and no loan proceeds have yet been received by the Company. However, the Company and the Investor are working together to close this financing as soon as possible. The Investor has also committed to provide the Company with a one-year revolving line of credit for an aggregate maximum principal amount of $2 million, again bearing interest of 18% (the two debt transactions are referred to as the “Financing”). The $2 million financing is contingent upon the Company’s filing of a Registration Statement on Form S-1 with the Securities and Exchange Commission with respect to an underwritten or “best efforts” public offering by the Company of its common stock, and/or common stock equivalents registered under the Securities Act of 1933, as amended for proceeds to the Company of not less than $5 million (a “Qualified Public Equity Offering”). The Company can give no assurances as of the date of issuance of the consolidated financial statements as to whether the Company will be successful in raising this Financing and executing a Qualified Public Equity Offering. The Company will use the proceeds from the Financing for general corporate purposes, including expenses related to the preparation of its Quarterly Report on Form 10-Q for the three months ended March 31, 2024, and expenses to facilitate a Qualified Public Equity Offering and the proceeds of the Qualified Public Equity Offering for general corporate purposes. With regards to the projected revenues and grants, a delay in the projected timing of inflows may result in the Company remaining insolvent and short of cash at any specific time over the next twelve months. Also, there is no guarantee that the Company’s plans to reduce monthly expenditures will be successful. Beyond that, there is no guarantee about when the Registration Statement in Form S-1 will be filed and therefore the committed one-year revolving line of credit of maximum $2 million will be received. In addition, there is no guarantee with regards to the Company’s ability to secure proceeds of not less than $5 million from the Qualified Public Entity Offering. If the Company is unable to obtain sufficient funding, it could be required to delay its development efforts, limit activities, and further reduce research and development costs, which could adversely affect its business prospects and delivery of contractual obligations. A cash shortfall at any point in time over the next twelve months could result in the Company failing to meet its overdue and current obligations which could trigger action against the Company and/or its subsidiaries for liquidation by employees, authorities, or creditors. Because of the uncertainty in securing additional funding, delays in growth of revenue, failure to materialize cost-cutting efforts and the insufficient amount of cash and cash equivalents as of the consolidated financial statement filing date, management has concluded that substantial doubt exists with respect to the Company’s ability to continue as a going concern for one year from the date the unaudited condensed consolidated financial statements are issued.

CY2023Q1

us-gaap

Increase Decrease In Other Current Liabilities

IncreaseDecreaseInOtherCurrentLiabilities

362000

usd

CY2024Q1

adn

Increase Decrease In Operating Lease Asset And Liabilities

IncreaseDecreaseInOperatingLeaseAssetAndLiabilities

-230000

usd

CY2023Q1

adn

Increase Decrease In Operating Lease Asset And Liabilities

IncreaseDecreaseInOperatingLeaseAssetAndLiabilities

-220000

usd

CY2023Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-11448000

usd

CY2024Q1

us-gaap

Payments To Acquire Machinery And Equipment

PaymentsToAcquireMachineryAndEquipment

29000

usd

CY2023Q1

us-gaap

Payments To Acquire Machinery And Equipment

PaymentsToAcquireMachineryAndEquipment

911000

usd

CY2023Q1

adn

Payments To Acquire Fixed Assets

PaymentsToAcquireFixedAssets

976000

usd

CY2024Q1

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-29000

usd

CY2023Q1

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-1887000

usd

CY2024Q1

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

126000

usd

CY2024Q1

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

126000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-2779000

usd

CY2023Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-13335000

usd

CY2024Q1

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

-11000

usd

CY2023Q1

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

11000

usd

CY2022Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

33619000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

1622000

usd

CY2023Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

20295000

usd

CY2024Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

774000

usd

CY2023Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

19545000

usd

CY2024Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

98000

usd

CY2024Q1

us-gaap

Restricted Cash Equivalents Noncurrent

RestrictedCashEquivalentsNoncurrent

750000

usd

CY2023Q1

us-gaap

Restricted Cash Equivalents Noncurrent

RestrictedCashEquivalentsNoncurrent

750000

usd

CY2024Q1

us-gaap

Restricted Cash And Cash Equivalents

RestrictedCashAndCashEquivalents

1622000

usd

CY2023Q1

us-gaap

Restricted Cash And Cash Equivalents

RestrictedCashAndCashEquivalents

20295000

usd

CY2024Q1

us-gaap

Basis Of Accounting

BasisOfAccounting

1. Basis of presentation Overview Advent Technologies Holdings, Inc. and its subsidiaries (collectively referred to as “Advent” and the “Company”) is an advanced materials and technology development company operating in the fuel cell, methanol, and hydrogen technology space. Advent is a world-leading company in the development of the HT-PEM technology (with more than 150 patents issued, pending, or licensed worldwide). The HT-PEM fuel cell technology developed by Advent enables off-grid power systems to produce clean power from various green fuels (hydrogen, methanol, bio and eMethanol, and renewable natural gas) and to function with higher efficiency at extreme ambient temperatures and in general extreme environmental conditions (humidity, air pollution). Advent’s main operations focus on developing and manufacturing the Membrane Electrode Assembly (MEA), which is the core electrochemical element and the most critical component of the fuel cell. The MEA largely determines lifetime, power density, efficiency, and overall cost of installation and operation for all applications. Advent is working with world-leading market-leading OEMs with the goal of bringing to the market complete fuel cell systems for a range of applications in the stationary power markets (backup, off-grid, and portable power) and the heavy-duty mobility markets (automotive, aviation, marine). Advent has its headquarters in Livermore, California, and the Company has MEA and fuel cell product development facilities in Livermore, California and Patras, Greece. Previously, the Company’s headquarters were located in Boston, Massachusetts. During 2023, the Company decided to consolidate certain of its German operations with its operations in Greece. During June 2024, the Company closed its facilities in Boston, MA, and no longer maintains its facilities in Denmark and the Philippines due to the bankruptcy of Advent Technologies A/S in July 2024, as discussed in Note 22 Subsequent events. On February 4, 2021 (“Closing Date”), AMCI Acquisition Corp. (“AMCI”), consummated the business combination (the “Business Combination”) pursuant to that certain merger agreement (the “Agreement and Plan of Merger”), dated October 12, 2020, by and among AMCI, AMCI Merger Sub Corp., a Delaware corporation and newly formed wholly-owned subsidiary of AMCI (“Merger Sub”), AMCI Sponsor LLC (the “Sponsor”), solely in the capacity as the representative from and after the effective time of the Business Combination for the stockholders of AMCI, Advent Technologies, Inc., a Delaware corporation (“Legacy Advent”), and Vassilios Gregoriou, solely in his capacity as the representative from and after the effective time for the Legacy Advent stockholders (the “Seller Representative”), as amended by Amendment No. 1 and Amendment No. 2 to the Agreement and Plan of Merger, dated as of October 19, 2020 and December 31, 2020, respectively, by and among AMCI, Merger Sub, Sponsor, Legacy Advent, and Seller Representative. In connection with the closing of the Business Combination (the “Closing”), AMCI acquired 100% of the stock of Legacy Advent (as it existed immediately prior to the Closing) and its subsidiaries. On the Closing Date, and in connection with the closing of the Business Combination, AMCI changed its name to Advent Technologies Holdings, Inc. Legacy Advent was deemed the accounting acquirer in the Business Combination based on an analysis of the criteria outlined in Accounting Standards Codification (“ASC”) 805. This determination was primarily based on Legacy Advent’s stockholders prior to the Business Combination having a majority of the voting interests in the combined company, Legacy Advent’s operations comprising the ongoing operations of the combined company, Legacy Advent’s board of directors comprising a majority of the board of directors of the combined company, and Legacy Advent’s senior management comprising the senior management of the combined company. Accordingly, for accounting purposes, the Business Combination was treated as the equivalent of Legacy Advent issuing stock for the net assets of AMCI, accompanied by a recapitalization. The net assets of AMCI are stated at historical cost, with no goodwill or other intangible assets recorded. While AMCI was the legal acquirer in the Business Combination, because Legacy Advent was deemed the accounting acquirer, the historical financial statements of Legacy Advent became the historical financial statements of the combined company, upon the consummation of the Business Combination. As a result, the consolidated financial statements included in this report reflect (i) the historical operating results of Legacy Advent prior to the Business Combination; (ii) the results of the Company (combined results of AMCI and Legacy Advent) following the closing of the Business Combination; (iii) the assets and liabilities of Legacy Advent at their historical cost; and (iv) Company’s equity structure for all periods presented. In accordance with guidance applicable to these circumstances, the equity structure has been restated in all comparative periods up to the Closing Date, to reflect the number of shares of the Company’s common stock, $0.0001 par value per share, issued to Legacy Advent’s stockholders in connection with the recapitalization transaction. As such, the shares and corresponding capital amounts and earnings per share related to Legacy Advent Preferred Stock (“Preferred Series A” and “Preferred Series Seed”) and Legacy Advent common stock prior to the Business Combination have been retroactively restated as shares reflecting the exchange ratio established in the Business Combination Agreement. Activity within the statement of changes in stockholders’ equity / (deficit) for the issuances of Legacy Advent’s Preferred Stock, were also retroactively converted to Legacy Advent common stock. On February 18, 2021, Advent Technologies, Inc. entered into a Membership Interest Purchase Agreement with Bren-Tronics, Inc. (“Bren-Tronics”) and UltraCell, LLC (“UltraCell”), a Delaware limited liability company and a direct wholly owned subsidiary of Bren-Tronics. UltraCell LLC was renamed to Advent Technologies LLC following its acquisition by the Company. On June 25, 2021, the Company entered into a Share Purchase Agreement, with F.E.R. fischer Edelstahlrohre GmbH, a limited liability company incorporated under the Laws of Germany (the “Seller”) to acquire all of the issued and outstanding equity interests in SerEnergy A/S, a Danish stock corporation and a wholly-owned subsidiary of the Seller (“SerEnergy”) and fischer eco solutions GmbH, a German limited liability company and a wholly-owned subsidiary of the Seller (“FES”) together with certain outstanding shareholder loan receivables. SerEnergy and FES were renamed to Advent Technologies A/S and Advent Technologies GmbH, respectively, following their acquisition by the Company on August 31, 2021. The unaudited condensed consolidated financial statements of the Company have been prepared to reflect the consolidation of the companies listed below: <table cellpadding="0" cellspacing="0" id="xdx_885_ecustom--SubsidiariesInConsolidationTableTextBlock_pn3n3_zwFBqGDgZA8h" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Basis of presentation (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Schedule of subsidiaries in consolidation</td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td><td style="text-align: center"> </td> <td style="text-align: center"> </td></tr> <tr style="vertical-align: bottom"> <td style="vertical-align: bottom; font-weight: bold; text-align: left"> </td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="font-weight: bold; text-align: center">Country of</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Ownership Interest</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="3" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Statements of Operations</td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; vertical-align: bottom; font-weight: bold; text-align: left">Company Name</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Incorporation</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Direct</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">Indirect</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2024</td><td style="text-align: center; font-weight: bold; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">2023</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; width: 41%; text-align: left">Advent Technologies, Inc.</td><td style="text-align: center; width: 1%"> </td> <td style="width: 10%; text-align: center">USA</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center">01/01 – 3/31</td><td style="text-align: center; width: 2%"> </td> <td style="width: 10%; text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies S.A.</td><td style="text-align: center"> </td> <td style="text-align: center">Greece</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesSAMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies LLC</td><td style="text-align: center"> </td> <td style="text-align: center">USA</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_901_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_909_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesLLCMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies GmbH</td><td style="text-align: center"> </td> <td style="text-align: center">Germany</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_908_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesGmbHMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Technologies A/S</td><td style="text-align: center"> </td> <td style="text-align: center">Denmark</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90C_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventTechnologiesASMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; vertical-align: top; text-align: left">Advent Green Energy Philippines, Inc</td><td style="text-align: center"> </td> <td style="text-align: center">Philippines</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_907_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--DirectOwnershipMember_pdd" title="Ownership Interest">-</td><td style="text-align: center"> </td> <td style="text-align: center"><span id="xdx_90F_ecustom--OwnershipPercentageInSubsdaries_c20240331__srt--ConsolidatedEntitiesAxis__custom--AdventGreenEnergyPhilippinesIncMember__srt--OwnershipAxis__custom--IndirectOwnershipMember_pdd" title="Ownership Interest">100%</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td><td style="text-align: center"> </td> <td style="text-align: center">01/01 – 3/31</td></tr> </table> The Company has limited financial information, for the period January 1, 2024, through March 31, 2024, including the statement of operation information for Advent Technologies A/S, its wholly owned subsidiary Advent Green Energy Philippines, Inc. and Advent Technologies GmbH due to the bankruptcy of Advent Technologies A/S and the related loss of access to the underlying accounting records and access to Company finance personnel. The Company estimated changes in balance sheet accounts, revenue and expenses based upon bank statements and internal management reporting. The subsidiaries do not qualify for discontinued operations until Q3 2024. Unaudited Condensed Consolidated Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”). The unaudited financial information reflects, in the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. The results reported for the interim period presented are not necessarily indicative of results that may be expected for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023, included in the Annual Report on Form 10-K filed with the SEC on August 13, 2024. We reclassified certain prior year amounts in our consolidated financial statements to conform to the current year presentation. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated. Share and per share amounts are presented on a post-conversion basis for all periods presented, unless otherwise specified. Going Concern The accompanying unaudited condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern. The Company considers that the going concern basis is appropriate for the preparation of its unaudited condensed consolidated financial statements, as it is pursuing additional fund raising as disclosed below and has no intentions to proceed with liquidation. The going concern basis of presentation assumes that the Company will continue in operation one year from the date these unaudited condensed consolidated financial statements are issued and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. As such, the accompanying unaudited condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Following the significant non adjusting subsequent events of Advent Technologies A/S bankruptcy and the termination of the Hood Park lease agreement, the Company presents a Proforma Consolidated Balance Sheet as at March 31, 2024 and December 31, 2023 in the Note 22 to the consolidated financial statements to reflect the impact of those events. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern for one year from the date that the unaudited condensed consolidated financial statements are issued. The Company’s ability to meet its liquidity needs will largely depend on its ability to generate cash in the future. During the three months ended March 31, 2024, the Company used $2.9 (2,876) million of cash in operating activities, and the Company’s ability to generate cash in the future is subject to general economic, financial, competitive, legislative, regulatory, and other factors that are beyond the Company’s control. Furthermore, the Company has suffered recurring operating losses and has a negative net working capital position of $10.0 million as of March 31, 2024. In addition, as of the issuance date of these unaudited condensed consolidated financial statements the Company is overdue in a number of its obligations which could give the right to creditors at any time from the issuance date of these consolidated financial statements to raise legal action against the Company which in turn could potentially lead to liquidation action against the Company and/or its subsidiaries. The transition to profitability and positive cash flow is highly dependent upon the successful development, approval, and commercialization of the Company’s products and the achievement of a revenue level adequate to support its cost structure and the Company can give no assurances that this will occur. Based on the Company’s current operating plan, the Company believes that its cash and cash equivalents as of March 31, 2024, of $0.8 million and $0.5 million as of September 25, 2024, are not sufficient to fund operations and capital expenditures for the twelve months following the filing of this Quarterly Report on Form 10-Q, and the Company will need to obtain additional funding in the very near term, otherwise the Company may immediately substantially curtail or terminate its operations. The Company performed a cash flow projection on a monthly basis for the twelve-month period following the issuance of the consolidated financial statements. With regards to the cash flow projections, the projected inflows from revenues and grants will be insufficient to cover the projected outflows, as such, the Company will continue to have a negative net working capital position and a delay in the projected timing of the short term financing and inflows and/or an immediate demand by creditors of repayment of the long outstanding payables may result in the Company being insolvent and short of cash at any specific time over the coming weeks and over the next twelve months. The highlights of the projections are as follows: The Company projects cash inflows from contracted revenues and grants for which it has already signed agreements with third parties and estimates projected outflows assuming the effective implementation of the Company’s plans to reduce monthly expenditures gradually during 2024. The cash flow projections do not include any cash inflows or outflows from Advent Technologies A/S which was declared bankrupt by the court in Aalborg, Denmark on July 25, 2024, and its wholly owned subsidiary Green Energy Philippines, Inc. The Company did not include any outflows relating to Advent Technologies A/S, since it believes that the bankruptcy of its subsidiary, will not have any material effect, except for a potential claim of approximately $0.5 million from a supplier contract for which the parent company Advent Technologies Holdings, Inc. is the guarantor. In addition, the projections do not include any cash outflows relating to commitments and contingencies as disclosed in Note 20 to the unaudited condensed consolidated financial statements, since the Company believes that any cash outflows relating to these commitments will not materialize based on the Company’s plans to agree the termination of such contracts with its suppliers and a contingent loss as outcome of the pending arbitration it is not probable. Until such time as the Company generates sufficient revenue to fund its operations (if ever), the Company plans to finance its operations and repay its existing and future liabilities and other obligations through the sale of equity and/or debt securities and, to the extent available, short-term and long-term loans. As part of its plan, on July 30, 2024, the Company entered into a securities purchase agreement, (the “Purchase Agreement”), with an institutional investor (the “Investor”) pursuant to which, at the closing, defined as the filing date of the Company’s 10-K, the Company will issue to the Investor a senior promissory note in the principal amount of $1 million (the “Senior Note”), repayable within one year and bearing interest of 18%. The Company has not yet closed on the $1 million financing and no loan proceeds have yet been received by the Company. However, the Company and the Investor are working together to close this financing as soon as possible. The Investor has also committed to provide the Company with a one-year revolving line of credit for an aggregate maximum principal amount of $2 million, again bearing interest of 18% (the two debt transactions are referred to as the “Financing”). The $2 million financing is contingent upon the Company’s filing of a Registration Statement on Form S-1 with the Securities and Exchange Commission with respect to an underwritten or “best efforts” public offering by the Company of its common stock, and/or common stock equivalents registered under the Securities Act of 1933, as amended for proceeds to the Company of not less than $5 million (a “Qualified Public Equity Offering”). The Company can give no assurances as of the date of issuance of the consolidated financial statements as to whether the Company will be successful in raising this Financing and executing a Qualified Public Equity Offering. The Company will use the proceeds from the Financing for general corporate purposes, including expenses related to the preparation of its Quarterly Report on Form 10-Q for the three months ended March 31, 2024, and expenses to facilitate a Qualified Public Equity Offering and the proceeds of the Qualified Public Equity Offering for general corporate purposes. With regards to the projected revenues and grants, a delay in the projected timing of inflows may result in the Company remaining insolvent and short of cash at any specific time over the next twelve months. Also, there is no guarantee that the Company’s plans to reduce monthly expenditures will be successful. Beyond that, there is no guarantee about when the Registration Statement in Form S-1 will be filed and therefore the committed one-year revolving line of credit of maximum $2 million will be received. In addition, there is no guarantee with regards to the Company’s ability to secure proceeds of not less than $5 million from the Qualified Public Entity Offering. If the Company is unable to obtain sufficient funding, it could be required to delay its development efforts, limit activities, and further reduce research and development costs, which could adversely affect its business prospects and delivery of contractual obligations. A cash shortfall at any point in time over the next twelve months could result in the Company failing to meet its overdue and current obligations which could trigger action against the Company and/or its subsidiaries for liquidation by employees, authorities, or creditors. Because of the uncertainty in securing additional funding, delays in growth of revenue, failure to materialize cost-cutting efforts and the insufficient amount of cash and cash equivalents as of the consolidated financial statement filing date, management has concluded that substantial doubt exists with respect to the Company’s ability to continue as a going concern for one year from the date the unaudited condensed consolidated financial statements are issued.

CY2024Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-2876000

usd

CY2024Q1

adn

Negative Net Working Capital

NegativeNetWorkingCapital

10000000.0

usd

CY2024Q1

us-gaap

Use Of Estimates

UseOfEstimates

Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. On an on-going basis, management evaluates the estimates and judgments, including those related to the selection of useful lives for tangible assets, expected future cash flows from long-lived assets to support impairment tests, the carrying value of goodwill, provisions necessary for accounts receivables and inventory write downs, provisions for legal disputes, and contingencies. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates under different assumptions and/or conditions.

CY2024Q1

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-2876000

usd

CY2024Q1

adn

Negative Net Working Capital

NegativeNetWorkingCapital

10000000.0

usd

CY2024Q1

us-gaap

Use Of Estimates

UseOfEstimates

Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. On an on-going basis, management evaluates the estimates and judgments, including those related to the selection of useful lives for tangible assets, expected future cash flows from long-lived assets to support impairment tests, the carrying value of goodwill, provisions necessary for accounts receivables and inventory write downs, provisions for legal disputes, and contingencies. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates under different assumptions and/or conditions.

CY2024Q1

us-gaap

Restricted Cash And Cash Equivalents At Carrying Value

RestrictedCashAndCashEquivalentsAtCarryingValue

900000

usd

CY2023Q4

us-gaap

Restricted Cash And Cash Equivalents At Carrying Value

RestrictedCashAndCashEquivalentsAtCarryingValue

900000

usd

CY2023Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

3562000

usd

CY2023Q4

us-gaap

Restricted Cash Current

RestrictedCashCurrent

100000

usd

CY2024Q1

us-gaap

Restricted Cash Noncurrent

RestrictedCashNoncurrent

750000

usd

CY2023Q4

us-gaap

Restricted Cash Noncurrent

RestrictedCashNoncurrent

750000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

1622000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

4412000

usd

CY2024Q1

adn

Period Of Warranty On Fuel Cells

PeriodOfWarrantyOnFuelCells

P2Y

CY2024Q1

adn

Percentage Of Accrue Warranty Reserve

PercentageOfAccrueWarrantyReserve

0.08

pure

CY2024Q1

adn

Period Of Warranty Reserve Expected To Be Incurred

PeriodOfWarrantyReserveExpectedToBeIncurred

P12M

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

911000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

1048000

usd

CY2023Q1

adn

Additions

20000

usd

CY2023Q1

adn

Settlements

-113000

usd

CY2023Q1

adn

Foreign Exchange Fluctuations

ForeignExchangeFluctuations

17000

usd

CY2024Q1

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

894000

usd

CY2023Q1

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

972000

usd

CY2024Q1

us-gaap

Restricted Cash And Cash Equivalents At Carrying Value

RestrictedCashAndCashEquivalentsAtCarryingValue

900000

usd

CY2023Q4

us-gaap

Restricted Cash And Cash Equivalents At Carrying Value

RestrictedCashAndCashEquivalentsAtCarryingValue

900000

usd

CY2024Q1

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

774000

usd

CY2023Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

3562000

usd

CY2024Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

98000

usd

CY2023Q4

us-gaap

Restricted Cash Current

RestrictedCashCurrent

100000

usd

CY2024Q1

us-gaap

Restricted Cash Noncurrent

RestrictedCashNoncurrent

750000

usd

CY2023Q4

us-gaap

Restricted Cash Noncurrent

RestrictedCashNoncurrent

750000

usd

CY2024Q1

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

1622000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

4412000

usd

CY2024Q1

adn

Period Of Warranty On Fuel Cells

PeriodOfWarrantyOnFuelCells

P2Y

CY2024Q1

adn

Percentage Of Accrue Warranty Reserve

PercentageOfAccrueWarrantyReserve

0.08

pure

CY2024Q1

adn

Period Of Warranty Reserve Expected To Be Incurred

PeriodOfWarrantyReserveExpectedToBeIncurred

P12M

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

911000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

1048000

usd

CY2023Q1

adn

Additions

20000

usd

CY2023Q1

adn

Settlements

-113000

usd

CY2024Q1

adn

Foreign Exchange Fluctuations

ForeignExchangeFluctuations

-17000

usd

CY2023Q1

adn

Foreign Exchange Fluctuations

ForeignExchangeFluctuations

17000

usd

CY2023Q1

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

972000

usd

CY2024Q1

us-gaap

Interest And Other Income

InterestAndOtherIncome

7000

usd

CY2023Q1

us-gaap

Interest And Other Income

InterestAndOtherIncome

7000

usd

CY2024Q1

adn

Outstanding Balances With Related Parties

OutstandingBalancesWithRelatedParties

0

usd

CY2023Q4

adn

Outstanding Balances With Related Parties

OutstandingBalancesWithRelatedParties

0

usd

CY2024Q1

us-gaap

Interest And Other Income

InterestAndOtherIncome

7000

usd

CY2023Q1

us-gaap

Interest And Other Income

InterestAndOtherIncome

7000

usd

CY2024Q1

adn

Outstanding Balances With Related Parties

OutstandingBalancesWithRelatedParties

0

usd

CY2023Q4

adn

Outstanding Balances With Related Parties

OutstandingBalancesWithRelatedParties

0

usd

CY2024Q1

us-gaap

Accounts Receivable Gross Current

AccountsReceivableGrossCurrent

1442000

usd

CY2023Q4

us-gaap

Accounts Receivable Gross Current

AccountsReceivableGrossCurrent

552000

usd

CY2024Q1

us-gaap

Allowance For Doubtful Accounts Receivable Current

AllowanceForDoubtfulAccountsReceivableCurrent

357000

usd

CY2023Q4

us-gaap

Allowance For Doubtful Accounts Receivable Current

AllowanceForDoubtfulAccountsReceivableCurrent

361000

usd

CY2024Q1

us-gaap

Accounts Receivable Gross Current

AccountsReceivableGrossCurrent

1442000

usd

CY2023Q4

us-gaap

Accounts Receivable Gross Current

AccountsReceivableGrossCurrent

552000

usd

CY2024Q1

us-gaap

Allowance For Doubtful Accounts Receivable Current

AllowanceForDoubtfulAccountsReceivableCurrent

357000

usd

CY2023Q4

us-gaap

Allowance For Doubtful Accounts Receivable Current

AllowanceForDoubtfulAccountsReceivableCurrent

361000

usd

CY2024Q1

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

1085000

usd

CY2023Q4

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

191000

usd

CY2024Q1

us-gaap

Inventory Raw Materials And Supplies

InventoryRawMaterialsAndSupplies

8813000

usd

CY2023Q4

us-gaap

Inventory Raw Materials And Supplies

InventoryRawMaterialsAndSupplies

9461000

usd

CY2024Q1

us-gaap

Inventory Work In Process

InventoryWorkInProcess

360000

usd

CY2023Q4

us-gaap

Inventory Work In Process

InventoryWorkInProcess

223000

usd

CY2024Q1

us-gaap

Inventory Finished Goods

InventoryFinishedGoods

5175000

usd

CY2023Q4

us-gaap

Inventory Finished Goods

InventoryFinishedGoods

5275000

usd

CY2024Q1

us-gaap

Inventory Gross

InventoryGross

14348000

usd

CY2023Q4

us-gaap

Inventory Gross

InventoryGross

14959000

usd

CY2024Q1

adn

Provision For Inventory

ProvisionForInventory

12271000

usd

CY2023Q4

adn

Provision For Inventory

ProvisionForInventory

12252000

usd

CY2024Q1

us-gaap

Inventory Net

InventoryNet

2077000

usd

CY2023Q4

us-gaap

Inventory Net

InventoryNet

2707000

usd

CY2023Q4

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-12252000

usd

CY2022Q4

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-232000

usd

CY2024Q1

adn

Provision For Slow Moving Inventory Additions

ProvisionForSlowMovingInventoryAdditions

-239000

usd

CY2024Q1

adn

Provision For Slow Moving Inventory Foreign Exchange Fluctuations

ProvisionForSlowMovingInventoryForeignExchangeFluctuations

220000

usd

CY2023Q1

adn

Provision For Slow Moving Inventory Foreign Exchange Fluctuations

ProvisionForSlowMovingInventoryForeignExchangeFluctuations

-4000

usd

CY2024Q1

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

1085000

usd

CY2023Q4

us-gaap

Accounts Receivable Net Current

AccountsReceivableNetCurrent

191000

usd

CY2024Q1

us-gaap

Inventory Raw Materials And Supplies

InventoryRawMaterialsAndSupplies

8813000

usd

CY2023Q4

us-gaap

Inventory Raw Materials And Supplies

InventoryRawMaterialsAndSupplies

9461000

usd

CY2024Q1

us-gaap

Inventory Work In Process

InventoryWorkInProcess

360000

usd

CY2023Q4

us-gaap

Inventory Work In Process

InventoryWorkInProcess

223000

usd

CY2024Q1

us-gaap

Inventory Finished Goods

InventoryFinishedGoods

5175000

usd

CY2023Q4

us-gaap

Inventory Finished Goods

InventoryFinishedGoods

5275000

usd

CY2023Q4

us-gaap

Inventory Gross

InventoryGross

14959000

usd

CY2024Q1

adn

Provision For Inventory

ProvisionForInventory

12271000

usd

CY2023Q4

adn

Provision For Inventory

ProvisionForInventory

12252000

usd

CY2024Q1

us-gaap

Inventory Net

InventoryNet

2077000

usd

CY2023Q4

us-gaap

Inventory Net

InventoryNet

2707000

usd

CY2023Q4

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-12252000

usd

CY2022Q4

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-232000

usd

CY2024Q1

adn

Provision For Slow Moving Inventory Additions

ProvisionForSlowMovingInventoryAdditions

-239000

usd

CY2024Q1

adn

Provision For Slow Moving Inventory Foreign Exchange Fluctuations

ProvisionForSlowMovingInventoryForeignExchangeFluctuations

220000

usd

CY2023Q1

adn

Provision For Slow Moving Inventory Foreign Exchange Fluctuations

ProvisionForSlowMovingInventoryForeignExchangeFluctuations

-4000

usd

CY2024Q1

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-12271000

usd

CY2023Q1

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-236000

usd

CY2024Q1

adn

Schedule Of Prepaid Expenses

ScheduleOfPrepaidExpenses

<table cellpadding="0" cellspacing="0" id="xdx_89B_ecustom--ScheduleOfPrepaidExpenses_pn3n3_zxnNFg1OwSz1" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Prepaid expenses and other current assets (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Schedule of prepaid expenses</td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_490_20240331" style="text-align: right"> </td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_497_20231231" style="text-align: right"> </td> <td style="text-align: left"> </td></tr> <tr style="vertical-align: bottom"> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; text-align: center">March 31, 2024</td> <td style="padding-bottom: 1pt"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">December 31, 2023</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; text-align: left">(Amounts in thousands)</td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center"> (Unaudited)</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="font-weight: bold; text-align: center"> </td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidInsurance_iI_pn3n3_maPECzRiQ_zZnvxRPZMbB5" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; width: 76%; text-align: left">Prepaid insurance expenses</td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">1,093</td> <td style="width: 1%; text-align: left"> </td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">155</td> <td style="width: 1%; text-align: left"> </td></tr> <tr id="xdx_400_ecustom--PrepaidResearch_iI_pn3n3_maPECzRiQ_zXhnrXdswTu4" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Prepaid research expenses</td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">13</td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">36</td> <td style="text-align: left"> </td></tr> <tr id="xdx_401_eus-gaap--OtherPrepaidExpenseCurrent_iI_pn3n3_maPECzRiQ_zo41I1jrnE73" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left; padding-bottom: 1pt">Other prepaid expenses</td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">957</td> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">958</td> <td style="padding-bottom: 1pt; text-align: left"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidExpenseCurrent_iTI_pn3n3_mtPECzRiQ_zH8IAEc2ivl1" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; font-weight: bold; text-align: left; padding-bottom: 2.5pt">Total</td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">2,063</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">1,149</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td></tr> </table>

CY2024Q1

us-gaap

Prepaid Insurance

PrepaidInsurance

1093000

usd

CY2024Q1

adn

Prepaid Research

PrepaidResearch

13000

usd

CY2024Q1

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-12271000

usd

CY2023Q1

adn

Change In Provision For Slow Moving Inventory Balance At Beginning

ChangeInProvisionForSlowMovingInventoryBalanceAtBeginning

-236000

usd

CY2024Q1

adn

Schedule Of Prepaid Expenses

ScheduleOfPrepaidExpenses

<table cellpadding="0" cellspacing="0" id="xdx_89B_ecustom--ScheduleOfPrepaidExpenses_pn3n3_zxnNFg1OwSz1" style="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%" summary="xdx: Disclosure - Prepaid expenses and other current assets (Details)"> <tr style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Schedule of prepaid expenses</td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_490_20240331" style="text-align: right"> </td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td id="xdx_497_20231231" style="text-align: right"> </td> <td style="text-align: left"> </td></tr> <tr style="vertical-align: bottom"> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; text-align: center">March 31, 2024</td> <td style="padding-bottom: 1pt"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center">December 31, 2023</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr style="vertical-align: bottom"> <td style="border-bottom: Black 1pt solid; text-align: left">(Amounts in thousands)</td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="border-bottom: Black 1pt solid; font-weight: bold; text-align: center"> (Unaudited)</td> <td style="padding-bottom: 1pt; font-weight: bold"> </td> <td style="font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="2" style="font-weight: bold; text-align: center"> </td> <td style="padding-bottom: 1pt; font-weight: bold"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidInsurance_iI_pn3n3_maPECzRiQ_zZnvxRPZMbB5" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; width: 76%; text-align: left">Prepaid insurance expenses</td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">1,093</td> <td style="width: 1%; text-align: left"> </td> <td style="width: 1%"> </td> <td style="width: 1%; text-align: left">$</td> <td style="width: 9%; text-align: right">155</td> <td style="width: 1%; text-align: left"> </td></tr> <tr id="xdx_400_ecustom--PrepaidResearch_iI_pn3n3_maPECzRiQ_zXhnrXdswTu4" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left">Prepaid research expenses</td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">13</td> <td style="text-align: left"> </td> <td> </td> <td style="text-align: left"> </td> <td style="text-align: right">36</td> <td style="text-align: left"> </td></tr> <tr id="xdx_401_eus-gaap--OtherPrepaidExpenseCurrent_iI_pn3n3_maPECzRiQ_zo41I1jrnE73" style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="text-indent: -0.125in; padding-left: 0.125in; text-align: left; padding-bottom: 1pt">Other prepaid expenses</td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">957</td> <td style="padding-bottom: 1pt; text-align: left"> </td> <td style="padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; text-align: right">958</td> <td style="padding-bottom: 1pt; text-align: left"> </td></tr> <tr id="xdx_407_eus-gaap--PrepaidExpenseCurrent_iTI_pn3n3_mtPECzRiQ_zH8IAEc2ivl1" style="vertical-align: bottom; background-color: White"> <td style="text-indent: -0.125in; padding-left: 0.125in; font-weight: bold; text-align: left; padding-bottom: 2.5pt">Total</td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">2,063</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td> <td style="font-weight: bold; padding-bottom: 2.5pt"> </td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: left">$</td> <td style="border-bottom: Black 2.5pt double; font-weight: bold; text-align: right">1,149</td> <td style="padding-bottom: 2.5pt; font-weight: bold; text-align: left"> </td></tr> </table>

CY2024Q1

us-gaap

Prepaid Insurance

PrepaidInsurance

1093000

usd

CY2023Q4

us-gaap

Prepaid Insurance

PrepaidInsurance

155000

usd

CY2024Q1

adn

Prepaid Research

PrepaidResearch

13000

usd

CY2023Q4

adn

Prepaid Research

PrepaidResearch

36000

usd

CY2024Q1

us-gaap

Other Prepaid Expense Current

OtherPrepaidExpenseCurrent

957000

usd

CY2023Q4

us-gaap

Other Prepaid Expense Current

OtherPrepaidExpenseCurrent

958000

usd

CY2024Q1

us-gaap

Prepaid Expense Current

PrepaidExpenseCurrent

2063000

usd

CY2023Q4

us-gaap

Prepaid Expense Current

PrepaidExpenseCurrent

1149000

usd

CY2024Q1

us-gaap

Value Added Tax Receivable

ValueAddedTaxReceivable

290000

usd

CY2023Q4

us-gaap

Value Added Tax Receivable

ValueAddedTaxReceivable

273000

usd

CY2024Q1

adn

Withholding Tax

WithholdingTax

20000

usd

CY2023Q4

adn

Withholding Tax

WithholdingTax

20000

usd

CY2024Q1

us-gaap

Grants Receivable

GrantsReceivable

559000

usd

CY2023Q4

us-gaap

Grants Receivable

GrantsReceivable

570000

usd

CY2023Q4

adn

Purchases Under Receipt

PurchasesUnderReceipt

1000

usd

CY2024Q1

adn

Guarantees

9000

usd

CY2023Q4

adn

Guarantees

9000

usd

CY2024Q1

us-gaap

Other Receivables Gross Current

OtherReceivablesGrossCurrent

107000

usd

CY2023Q4

us-gaap

Other Receivables Gross Current

OtherReceivablesGrossCurrent

152000

usd

CY2024Q1

adn

Accrued Sublease Income

AccruedSubleaseIncome

130000

usd

CY2023Q4

adn

Accrued Sublease Income

AccruedSubleaseIncome

80000

usd

CY2024Q1

adn

Accrued Interest Income

AccruedInterestIncome

6000

usd

CY2024Q1

us-gaap

Other Assets Current

OtherAssetsCurrent

1121000

usd

CY2023Q4

us-gaap

Other Assets Current

OtherAssetsCurrent

1105000

usd

CY2024Q1

us-gaap

Indefinitelived Intangible Assets Acquired

IndefinitelivedIntangibleAssetsAcquired

406000

usd

CY2024Q1

adn

Impairment Of Intangible Asset Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill

-406000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Gross

FiniteLivedIntangibleAssetsGross

24328000

usd

CY2023Q4

adn

Prepaid Research

PrepaidResearch

36000

usd

CY2024Q1

us-gaap

Other Prepaid Expense Current

OtherPrepaidExpenseCurrent

957000

usd

CY2023Q4

us-gaap

Other Prepaid Expense Current

OtherPrepaidExpenseCurrent

958000

usd

CY2024Q1

us-gaap

Prepaid Expense Current

PrepaidExpenseCurrent

2063000

usd

CY2024Q1

us-gaap

Value Added Tax Receivable

ValueAddedTaxReceivable

290000

usd

CY2023Q4

us-gaap

Value Added Tax Receivable

ValueAddedTaxReceivable

273000

usd

CY2024Q1

adn

Withholding Tax

WithholdingTax

20000

usd

CY2023Q4

adn

Withholding Tax

WithholdingTax

20000

usd

CY2024Q1

us-gaap

Grants Receivable

GrantsReceivable

559000

usd

CY2023Q4

us-gaap

Grants Receivable

GrantsReceivable

570000

usd

CY2023Q4

adn

Purchases Under Receipt

PurchasesUnderReceipt

1000

usd

CY2024Q1

adn

Guarantees

9000

usd

CY2023Q4

adn

Guarantees

9000

usd

CY2024Q1

us-gaap

Other Receivables Gross Current

OtherReceivablesGrossCurrent

107000

usd

CY2023Q4

us-gaap

Other Receivables Gross Current

OtherReceivablesGrossCurrent

152000

usd

CY2024Q1

adn

Accrued Sublease Income

AccruedSubleaseIncome

130000

usd

CY2023Q4

adn

Accrued Sublease Income

AccruedSubleaseIncome

80000

usd

CY2024Q1

adn

Accrued Interest Income

AccruedInterestIncome

6000

usd

CY2024Q1

us-gaap

Other Assets Current

OtherAssetsCurrent

1121000

usd

CY2023Q4

us-gaap

Other Assets Current

OtherAssetsCurrent

1105000

usd

CY2024Q1

us-gaap

Indefinitelived Intangible Assets Acquired

IndefinitelivedIntangibleAssetsAcquired

406000

usd

CY2024Q1

adn

Impairment Of Intangible Asset Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill

-406000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Gross

FiniteLivedIntangibleAssetsGross

24328000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

-4682000

usd

CY2024Q1

adn

Cumulative Impairment

CumulativeImpairment

-19569000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

77000

usd

CY2024Q1

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

24734000

usd

CY2024Q1

adn

Intangible Assets Gross Excluding Goodwill Accumulated Amortization

IntangibleAssetsGrossExcludingGoodwillAccumulatedAmortization

-4682000

usd

CY2024Q1

adn

Cumulative Impairment On Intangible Assets

CumulativeImpairmentOnIntangibleAssets

-19975000

usd

CY2024Q1

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

77000

usd

CY2023

us-gaap

Indefinitelived Intangible Assets Acquired

IndefinitelivedIntangibleAssetsAcquired

406000

usd

CY2023

adn

Impairment Of Intangible Asset Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill

-406000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Gross

FiniteLivedIntangibleAssetsGross

24332000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

-4684000

usd

CY2023Q4

adn

Cumulative Impairment

CumulativeImpairment

-19569000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

79000

usd

CY2023Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

24738000

usd

CY2023Q4

adn

Intangible Assets Gross Excluding Goodwill Accumulated Amortization

IntangibleAssetsGrossExcludingGoodwillAccumulatedAmortization

-4684000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

-4682000

usd

CY2024Q1

adn

Cumulative Impairment

CumulativeImpairment

-19569000

usd

CY2024Q1

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

77000

usd

CY2024Q1

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

24734000

usd

CY2024Q1

adn

Intangible Assets Gross Excluding Goodwill Accumulated Amortization

IntangibleAssetsGrossExcludingGoodwillAccumulatedAmortization

-4682000

usd

CY2024Q1

adn

Cumulative Impairment On Intangible Assets

CumulativeImpairmentOnIntangibleAssets

-19975000

usd

CY2024Q1

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

77000

usd

CY2023

us-gaap

Indefinitelived Intangible Assets Acquired

IndefinitelivedIntangibleAssetsAcquired

406000

usd

CY2023

adn

Impairment Of Intangible Asset Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetIndefinitelivedExcludingGoodwill

-406000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

-4684000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

79000

usd

CY2023Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

24738000

usd

CY2023Q4

adn

Cumulative Impairment On Intangible Assets

CumulativeImpairmentOnIntangibleAssets

-19975000

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

79000

usd

CY2024Q1

us-gaap

Property Plant And Equipment Gross

PropertyPlantAndEquipmentGross

32059000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Gross

PropertyPlantAndEquipmentGross

33568000

usd

CY2024Q1

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

8926000

usd

CY2023Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

9635000

usd

CY2024Q1

adn

Less Cumulative Impairment

LessCumulativeImpairment

-2384000

usd

CY2023Q4

adn

Less Cumulative Impairment

LessCumulativeImpairment

-2384000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

21549000

usd

CY2024Q1

us-gaap

Property Plant And Equipment Additions

PropertyPlantAndEquipmentAdditions

28000

usd

CY2024Q1

us-gaap

Gain Loss On Sale Of Other Assets

GainLossOnSaleOfOtherAssets

21000

usd

CY2024Q2

us-gaap

Line Of Credit

LineOfCredit

750000

usd

CY2024Q1

us-gaap

Depreciation

717000

usd

CY2023Q1

us-gaap

Depreciation

401000

usd

CY2023Q4

adn

Cumulative Impairment On Intangible Assets

CumulativeImpairmentOnIntangibleAssets

-19975000

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

79000

usd

CY2024Q1

us-gaap

Property Plant And Equipment Gross

PropertyPlantAndEquipmentGross

32059000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Gross

PropertyPlantAndEquipmentGross

33568000

usd

CY2024Q1

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

8926000

usd

CY2023Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

9635000

usd

CY2024Q1

adn

Less Cumulative Impairment

LessCumulativeImpairment

-2384000

usd

CY2023Q4

adn

Less Cumulative Impairment

LessCumulativeImpairment

-2384000

usd

CY2024Q1

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

20749000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

21549000

usd

CY2024Q1

us-gaap

Property Plant And Equipment Additions

PropertyPlantAndEquipmentAdditions

28000

usd

CY2023Q1

us-gaap

Property Plant And Equipment Additions

PropertyPlantAndEquipmentAdditions

2500000

usd

CY2024Q1

us-gaap

Gain Loss On Sale Of Other Assets

GainLossOnSaleOfOtherAssets

21000

usd

CY2024Q2

us-gaap

Line Of Credit

LineOfCredit

750000

usd

CY2024Q1

us-gaap

Depreciation

717000

usd

CY2023Q1

us-gaap

Depreciation

401000

usd

CY2024Q1

adn

Trade And Other Payables

TradeAndOtherPayables

5679000

usd

CY2023Q4

adn

Trade And Other Payables

TradeAndOtherPayables

5087000

usd

CY2024Q1

us-gaap

Accrued Liabilities And Other Liabilities

AccruedLiabilitiesAndOtherLiabilities

813000

usd

CY2023Q4

us-gaap

Accrued Liabilities And Other Liabilities

AccruedLiabilitiesAndOtherLiabilities

831000

usd

CY2024Q1

adn

Other Short Term Payables Current

OtherShortTermPayablesCurrent

256000

usd

CY2023Q4

adn

Other Short Term Payables Current

OtherShortTermPayablesCurrent

262000

usd

CY2024Q1

us-gaap

Taxes Payable Current

TaxesPayableCurrent

230000

usd

CY2023Q4

us-gaap

Taxes Payable Current

TaxesPayableCurrent

257000

usd

CY2024Q1

us-gaap

Accrued Vacation Current

AccruedVacationCurrent

243000

usd

CY2023Q4

us-gaap

Accrued Vacation Current

AccruedVacationCurrent

248000

usd

CY2024Q1

us-gaap

Product Warranty Accrual Classified Current

ProductWarrantyAccrualClassifiedCurrent

223000

usd

CY2023Q4

us-gaap

Product Warranty Accrual Classified Current

ProductWarrantyAccrualClassifiedCurrent

228000

usd

CY2024Q1

adn

Other Current Liabilities Social Security Funds

OtherCurrentLiabilitiesSocialSecurityFunds

43000

usd

CY2023Q4

adn

Other Current Liabilities Social Security Funds

OtherCurrentLiabilitiesSocialSecurityFunds

81000

usd

CY2024Q1

adn

Other Current Liabilities Overtime Provision

OtherCurrentLiabilitiesOvertimeProvision

8000

usd

CY2023Q4

adn

Other Current Liabilities Overtime Provision

OtherCurrentLiabilitiesOvertimeProvision

9000

usd

CY2024Q1

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1816000

usd

CY2023Q4

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1916000

usd

CY2024Q1

adn

Trade And Other Payables

TradeAndOtherPayables

5679000

usd

CY2023Q4

adn

Trade And Other Payables

TradeAndOtherPayables

5087000

usd

CY2024Q1

us-gaap

Accrued Liabilities And Other Liabilities

AccruedLiabilitiesAndOtherLiabilities

813000

usd

CY2023Q4

us-gaap

Accrued Liabilities And Other Liabilities

AccruedLiabilitiesAndOtherLiabilities

831000

usd

CY2024Q1

adn

Other Short Term Payables Current

OtherShortTermPayablesCurrent

256000

usd

CY2023Q4

adn

Other Short Term Payables Current

OtherShortTermPayablesCurrent

262000

usd

CY2024Q1

us-gaap

Taxes Payable Current

TaxesPayableCurrent

230000

usd

CY2023Q4

us-gaap

Taxes Payable Current

TaxesPayableCurrent

257000

usd

CY2024Q1

us-gaap

Accrued Vacation Current

AccruedVacationCurrent

243000

usd

CY2023Q4

us-gaap

Accrued Vacation Current

AccruedVacationCurrent

248000

usd

CY2024Q1

us-gaap

Product Warranty Accrual Classified Current

ProductWarrantyAccrualClassifiedCurrent

223000

usd

CY2023Q4

us-gaap

Product Warranty Accrual Classified Current

ProductWarrantyAccrualClassifiedCurrent

228000

usd

CY2024Q1

adn

Other Current Liabilities Social Security Funds

OtherCurrentLiabilitiesSocialSecurityFunds

43000

usd

CY2023Q4

adn

Other Current Liabilities Social Security Funds

OtherCurrentLiabilitiesSocialSecurityFunds

81000

usd

CY2024Q1

adn

Other Current Liabilities Overtime Provision

OtherCurrentLiabilitiesOvertimeProvision

8000

usd

CY2023Q4

adn

Other Current Liabilities Overtime Provision

OtherCurrentLiabilitiesOvertimeProvision

9000

usd

CY2024Q1

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1816000

usd

CY2023Q4

us-gaap

Other Liabilities Current

OtherLiabilitiesCurrent

1916000

usd

CY2024Q1

us-gaap

Accrued Professional Fees Current

AccruedProfessionalFeesCurrent

270000

usd

CY2023Q4

us-gaap

Accrued Professional Fees Current

AccruedProfessionalFeesCurrent

219000

usd

CY2024Q1

us-gaap

Accrued Payroll Taxes Current

AccruedPayrollTaxesCurrent

61000

usd

CY2023Q4

us-gaap

Accrued Payroll Taxes Current

AccruedPayrollTaxesCurrent

139000

usd

CY2024Q1

us-gaap

Accrued Professional Fees Current

AccruedProfessionalFeesCurrent

270000

usd

CY2023Q4

us-gaap

Accrued Professional Fees Current

AccruedProfessionalFeesCurrent

219000

usd

CY2024Q1

us-gaap

Accrued Payroll Taxes Current

AccruedPayrollTaxesCurrent

61000

usd

CY2023Q4

us-gaap

Accrued Payroll Taxes Current

AccruedPayrollTaxesCurrent

139000

usd

CY2024Q1

us-gaap

Other Accrued Liabilities Current

OtherAccruedLiabilitiesCurrent

482000

usd

CY2023Q4

us-gaap

Other Accrued Liabilities Current

OtherAccruedLiabilitiesCurrent

473000

usd

CY2024Q1

us-gaap

Accrued Liabilities Current

AccruedLiabilitiesCurrent

813000

usd

CY2023Q4

us-gaap

Accrued Liabilities Current

AccruedLiabilitiesCurrent

831000

usd

CY2021Q1

us-gaap

Area Of Real Estate Property

AreaOfRealEstateProperty

6041

CY2021Q1

us-gaap

Capital Lease Obligations

CapitalLeaseObligations

500000

usd

CY2021Q1

us-gaap

Lessee Operating Lease Term Of Contract

LesseeOperatingLeaseTermOfContract

P5Y

CY2023Q1

us-gaap

Area Of Real Estate Property

AreaOfRealEstateProperty

6041

CY2023Q1

us-gaap

Capital Lease Obligations

CapitalLeaseObligations

600000

usd

CY2021Q1

us-gaap

Lessee Operating Lease Term Of Contract

LesseeOperatingLeaseTermOfContract

P8Y6M

CY2021Q1

us-gaap

Lessee Operating Lease Renewal Term

LesseeOperatingLeaseRenewalTerm

P5Y

CY2021Q1

us-gaap

Security Deposit

SecurityDeposit

800000

usd

CY2024Q1

adn

Rental Expense

RentalExpense

500000

usd

CY2023Q1

adn

Rental Expense

RentalExpense

600000

usd

CY2024Q1

us-gaap

Short Term Lease Cost

ShortTermLeaseCost

10000.00

usd

CY2023Q1

us-gaap

Short Term Lease Cost

ShortTermLeaseCost

100000

usd

CY2024Q1

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

3046000

usd

CY2023Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

3216000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Next Twelve Months

LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

1674000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Two

LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

2246000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Three

LesseeOperatingLeaseLiabilityPaymentsDueYearThree

1884000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Four

LesseeOperatingLeaseLiabilityPaymentsDueYearFour

1705000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Five

LesseeOperatingLeaseLiabilityPaymentsDueYearFive

1751000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due After Year Five

LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

3185000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due

LesseeOperatingLeaseLiabilityPaymentsDue

12445000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Undiscounted Excess Amount

LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

2429000

usd

CY2024Q1

us-gaap

Operating Lease Liability

OperatingLeaseLiability

10016000

usd

CY2024Q1

us-gaap

Operating Lease Liability Current

OperatingLeaseLiabilityCurrent

2164000

usd

CY2024Q1

us-gaap

Other Accrued Liabilities Current

OtherAccruedLiabilitiesCurrent

482000

usd

CY2023Q4

us-gaap

Other Accrued Liabilities Current

OtherAccruedLiabilitiesCurrent

473000

usd

CY2024Q1

us-gaap

Accrued Liabilities Current

AccruedLiabilitiesCurrent

813000

usd

CY2021Q1

us-gaap

Area Of Real Estate Property

AreaOfRealEstateProperty

6041

CY2021Q1

us-gaap

Lessee Operating Lease Term Of Contract

LesseeOperatingLeaseTermOfContract

P5Y

CY2023Q1

us-gaap

Area Of Real Estate Property

AreaOfRealEstateProperty

6041

CY2023Q1

us-gaap

Capital Lease Obligations

CapitalLeaseObligations

600000

usd

CY2021Q1

us-gaap

Area Of Real Estate Property

AreaOfRealEstateProperty

21401

CY2021Q1

us-gaap

Capital Lease Obligations

CapitalLeaseObligations

1500000

usd

CY2021Q1

us-gaap

Lessee Operating Lease Term Of Contract

LesseeOperatingLeaseTermOfContract

P8Y6M

CY2021Q1

us-gaap

Lessee Operating Lease Renewal Term

LesseeOperatingLeaseRenewalTerm

P5Y

CY2021Q1

us-gaap

Security Deposit

SecurityDeposit

800000

usd

CY2024Q1

adn

Rental Expense

RentalExpense

500000

usd

CY2023Q1

adn

Rental Expense

RentalExpense

600000

usd

CY2024Q1

us-gaap

Short Term Lease Cost

ShortTermLeaseCost

10000.00

usd

CY2023Q1

us-gaap

Short Term Lease Cost

ShortTermLeaseCost

100000

usd

CY2024Q1

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

3046000

usd

CY2023Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

3216000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Next Twelve Months

LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

1674000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Three

LesseeOperatingLeaseLiabilityPaymentsDueYearThree

1884000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Four

LesseeOperatingLeaseLiabilityPaymentsDueYearFour

1705000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due Year Five

LesseeOperatingLeaseLiabilityPaymentsDueYearFive

1751000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due After Year Five

LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

3185000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Payments Due

LesseeOperatingLeaseLiabilityPaymentsDue

12445000

usd

CY2024Q1

us-gaap

Lessee Operating Lease Liability Undiscounted Excess Amount

LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

2429000

usd

CY2024Q1

us-gaap

Operating Lease Liability

OperatingLeaseLiability

10016000

usd

CY2024Q1

us-gaap

Operating Lease Liability Current

OperatingLeaseLiabilityCurrent

2164000

usd

CY2024Q1

us-gaap

Operating Lease Liability Noncurrent

OperatingLeaseLiabilityNoncurrent

7852000

usd

CY2024Q1

us-gaap

Product Warranty Accrual Noncurrent

ProductWarrantyAccrualNoncurrent

700000

usd

CY2023Q4

us-gaap

Product Warranty Accrual Noncurrent

ProductWarrantyAccrualNoncurrent

700000

usd

CY2024Q1

us-gaap

Operating Lease Liability Noncurrent

OperatingLeaseLiabilityNoncurrent

7852000

usd

CY2024Q1

us-gaap

Product Warranty Accrual Noncurrent

ProductWarrantyAccrualNoncurrent

700000

usd

CY2024Q1

us-gaap

Product Warranty Accrual

ProductWarrantyAccrual

900000

usd

CY2023Q4

us-gaap

Product Warranty Accrual

ProductWarrantyAccrual

900000

usd

CY2024Q1

adn

Number Of Shares Authorized

NumberOfSharesAuthorized

501000000

shares

CY2024Q1

adn

Common Stock Shares Designated

CommonStockSharesDesignated

500000000

shares

CY2024Q1

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

1000000

shares

CY2024Q1

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2605135

shares

CY2023Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2580159

shares

CY2023Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2580159

shares

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2023Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

977000

usd

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2023Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

977000

usd

CY2024Q1

us-gaap

Contract With Customer Asset Gross Current

ContractWithCustomerAssetGrossCurrent

11000

usd

CY2023Q4

us-gaap

Contract With Customer Asset Gross Current

ContractWithCustomerAssetGrossCurrent

21000

usd

CY2024Q1

us-gaap

Product Warranty Accrual

ProductWarrantyAccrual

900000

usd

CY2023Q4

us-gaap

Product Warranty Accrual

ProductWarrantyAccrual

900000

usd

CY2024Q1

adn

Number Of Shares Authorized

NumberOfSharesAuthorized

501000000

shares

CY2024Q1

adn

Common Stock Shares Designated

CommonStockSharesDesignated

500000000

shares

CY2024Q1

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.0001

CY2024Q1

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2605135

shares

CY2024Q1

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2605135

shares

CY2023Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

2580159

shares

CY2023Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

2580159

shares

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2023Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

977000

usd

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2024Q1

us-gaap

Contract With Customer Asset Gross Current

ContractWithCustomerAssetGrossCurrent

11000

usd

CY2023Q4

us-gaap

Contract With Customer Asset Gross Current

ContractWithCustomerAssetGrossCurrent

21000

usd

CY2024Q1

us-gaap

Contract With Customer Liability

ContractWithCustomerLiability

2300000

usd

CY2023Q4

us-gaap

Contract With Customer Liability

ContractWithCustomerLiability

2000000.0

usd

CY2024Q1

us-gaap

Contract With Customer Liability Revenue Recognized

ContractWithCustomerLiabilityRevenueRecognized

100000

usd

CY2024Q1

us-gaap

Contract With Customer Liability

ContractWithCustomerLiability

2300000

usd

CY2023Q4

us-gaap

Contract With Customer Liability

ContractWithCustomerLiability

2000000.0

usd

CY2024Q1

us-gaap

Contract With Customer Liability Revenue Recognized

ContractWithCustomerLiabilityRevenueRecognized

100000

usd

CY2024Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

796000

usd

CY2024Q1

us-gaap

Number Of Operating Segments

NumberOfOperatingSegments

1

integer

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2023Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

977000

usd

CY2024Q1

adn

Accrued Interest Expense

AccruedInterestExpense

200000

usd

CY2024Q1

us-gaap

Guarantee Obligations Current Carrying Value

GuaranteeObligationsCurrentCarryingValue

0

usd

CY2022Q3

adn

Contractual Obligation Minimum Quantity Pieces

ContractualObligationMinimumQuantityPieces

318400

integer

CY2023Q2

adn

Contractual Obligation Minimum Quantity Pieces

ContractualObligationMinimumQuantityPieces

75400

integer

CY2024Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-55000

usd

CY2023Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

796000

usd

CY2024Q1

us-gaap

Number Of Operating Segments

NumberOfOperatingSegments

1

integer

CY2024Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

3451000

usd

CY2023Q1

us-gaap

Revenue From Contract With Customer Excluding Assessed Tax

RevenueFromContractWithCustomerExcludingAssessedTax

977000

usd

CY2024Q1

adn

Accrued Interest Expense

AccruedInterestExpense

200000

usd

CY2024Q1

us-gaap

Loss Contingency Accrual Product Liability Net

LossContingencyAccrualProductLiabilityNet

5100000

usd

CY2024Q1

us-gaap

Guarantee Obligations Current Carrying Value

GuaranteeObligationsCurrentCarryingValue

0

usd

CY2023Q4

us-gaap

Guarantee Obligations Current Carrying Value

GuaranteeObligationsCurrentCarryingValue

0

usd

CY2023Q4

adn

Contractual Obligation Minimum Quantity

ContractualObligationMinimumQuantity

21000

CY2022Q3

adn

Contractual Obligation Minimum Quantity Pieces

ContractualObligationMinimumQuantityPieces

318400

integer

CY2023Q2

adn

Contractual Obligation Minimum Quantity Pieces

ContractualObligationMinimumQuantityPieces

75400

integer

CY2024Q1

adn

Contractual Obligation Quantity Pieces Year One

ContractualObligationQuantityPiecesYearOne

57600

integer

CY2024Q1

adn

Contractual Obligation Quantity Year One

ContractualObligationQuantityYearOne

6174

CY2024Q1

us-gaap

Contractual Obligation Due In Second Year

ContractualObligationDueInSecondYear

2304000

usd

CY2024Q1

adn

Contractual Obligation Quantity Year Two

ContractualObligationQuantityYearTwo

8000

CY2024Q1

us-gaap

Contractual Obligation Due In Third Year

ContractualObligationDueInThirdYear

2150000

usd

CY2024Q1

adn

Contractual Obligation Quantity Pieces

ContractualObligationQuantityPieces

57600

integer

CY2024Q1

adn

Contractual Obligation Quantity

ContractualObligationQuantity

14174

CY2024Q1

us-gaap

Contractual Obligation

ContractualObligation

4454000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

1733439

shares

CY2024Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

1733439

shares

CY2024Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-3.62

CY2023Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.92

CY2024Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-3.62

CY2023Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.92

CY2024Q2

us-gaap

Line Of Credit

LineOfCredit

750000

usd

CY2024Q2

adn

Sell Of Property Plant And Equipment Description

SellOfPropertyPlantAndEquipmentDescription

Company entered into an agreement to sell some of its coating machines (part of its property, plant and equipment) from the Hood Park facility for $0.9 million resulting in a loss of $2.4 million. On May 8, 2024, the Company received an initial deposit of $0.3 million and the remaining $0.6 million in July 2024.

CY2023Q4

adn

Cash And Cash Equivalents

CashAndCashEquivalents

3562000

usd

CY2023Q4

us-gaap

Restricted Cash Current

RestrictedCashCurrent

100000

usd

CY2023Q4

adn

Account Receivable Net

AccountReceivableNet

191000

usd

CY2023Q4

adn

Contract Assets

ContractAssets

21000

usd

CY2023Q4

adn

Inventories

2707000

usd

CY2023Q4

adn

Prepaid Expenses And Other Current Assets

PrepaidExpensesAndOtherCurrentAssets

2254000

usd

CY2023Q4

adn

Total Current Assets

TotalCurrentAssets

8835000

usd

CY2023Q4

adn

Intangibles Net

IntangiblesNet

79000

usd

CY2023Q4

adn

Property And Equipment Net

PropertyAndEquipmentNet

21549000

usd

CY2024Q1

us-gaap

Contractual Obligation Due In Third Year

ContractualObligationDueInThirdYear

2150000

usd

CY2024Q1

adn

Contractual Obligation Quantity Pieces

ContractualObligationQuantityPieces

57600

integer

CY2024Q1

adn

Contractual Obligation Quantity

ContractualObligationQuantity

14174

CY2024Q1

us-gaap

Contractual Obligation

ContractualObligation

4454000

usd

CY2024Q1

us-gaap

Net Income Loss

NetIncomeLoss

-9356000

usd

CY2023Q1

us-gaap

Net Income Loss

NetIncomeLoss

-11988000

usd

CY2024Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

1733439

shares

CY2024Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

2584918

shares

CY2023Q1

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

1733439

shares

CY2024Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-3.62

CY2023Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.92

CY2024Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-3.62

CY2023Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.92

CY2023Q4

us-gaap

Restricted Cash Current

RestrictedCashCurrent

100000

usd

CY2023Q4

adn

Account Receivable Net

AccountReceivableNet

191000

usd

CY2023Q4

adn

Contract Assets

ContractAssets

21000

usd

CY2023Q4

adn

Inventories

2707000

usd

CY2023Q4

adn

Prepaid Expenses And Other Current Assets

PrepaidExpensesAndOtherCurrentAssets

2254000

usd

CY2023Q4

adn

Total Current Assets

TotalCurrentAssets

8835000

usd

CY2023Q4

adn

Intangibles Net

IntangiblesNet

79000

usd

CY2023Q4

adn

Property And Equipment Net

PropertyAndEquipmentNet

21549000

usd

CY2023Q4

adn

Rightofuse Assets

RightofuseAssets

3216000

usd

CY2023Q4

adn

Restricted Cash Noncurrents

RestrictedCashNoncurrents

750000

usd

CY2023Q4

adn

Other Noncurrent Assets

OtherNoncurrentAssets

308000

usd

CY2023Q4

adn

Total Assets

TotalAssets

34737000

usd

CY2023Q4

adn

Trade And Other Payables

TradeAndOtherPayables

5087000

usd

CY2023Q4

adn

Deferred Income From Grants Current

DeferredIncomeFromGrantsCurrent

530000

usd

CY2023Q4

adn

Contract Liabilities

ContractLiabilities

2015000

usd

CY2023Q4

adn

Other Current Liabilities

OtherCurrentLiabilities

1916000

usd

CY2023Q4

adn

Operating Lease Liabilities

OperatingLeaseLiabilities

2186000

usd

CY2023Q4

adn

Rightofuse Assets

RightofuseAssets

3216000

usd

CY2023Q4

adn

Restricted Cash Noncurrents

RestrictedCashNoncurrents

750000

usd

CY2023Q4

adn

Other Noncurrent Assets

OtherNoncurrentAssets

308000

usd

CY2023Q4

adn

Total Noncurrent Assets

TotalNoncurrentAssets

25902000

usd

CY2023Q4

adn

Total Assets

TotalAssets

34737000

usd

CY2023Q4

adn

Trade And Other Payables

TradeAndOtherPayables

5087000

usd

CY2023Q4

adn

Deferred Income From Grants Current

DeferredIncomeFromGrantsCurrent

530000

usd

CY2023Q4

adn

Income Tax Payable

IncomeTaxPayable

179000

usd

CY2023Q4

adn

Total Current Liabilities

TotalCurrentLiabilities

11913000

usd

CY2023Q4

adn

Warrant Liability

WarrantLiability

59000

usd

CY2023Q4

adn

Defined Benefit Obligation

DefinedBenefitObligation

83000

usd

CY2023Q4

adn

Other Longterm Liabilities

OtherLongtermLiabilities

684000

usd

CY2023Q4

adn

Total Noncurrent Liabilities

TotalNoncurrentLiabilities

9376000

usd

CY2023Q4

adn

Total Liabilities

TotalLiabilities

21289000

usd

CY2023Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

194941000

usd

CY2023Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-2334000

usd

CY2023Q4

adn

Accumulated Deficit

AccumulatedDeficit

-179159000

usd

CY2023Q4

adn

Total Stockholders Equity

TotalStockholdersEquity

13448000

usd

CY2023Q4

adn

Total Liabilities And Stockholders Equity

TotalLiabilitiesAndStockholdersEquity

34737000

usd

CY2024Q1

adn

Cash And Cash Equivalents

CashAndCashEquivalents

774000

usd

CY2024Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

98000

usd

CY2024Q1

adn

Account Receivable Net

AccountReceivableNet

1085000

usd

CY2024Q1

adn

Contract Assets

ContractAssets

11000

usd

CY2024Q1

adn

Inventories

2077000

usd

CY2024Q1

adn

Prepaid Expenses And Other Current Assets

PrepaidExpensesAndOtherCurrentAssets

3184000

usd

CY2024Q1

adn

Total Current Assets

TotalCurrentAssets

7229000

usd

CY2024Q1

adn

Intangibles Net

IntangiblesNet

77000

usd

CY2024Q1

adn

Property And Equipment Net

PropertyAndEquipmentNet

20749000

usd

CY2024Q1

adn

Rightofuse Assets

RightofuseAssets

3046000

usd

CY2024Q1

adn

Restricted Cash Noncurrents

RestrictedCashNoncurrents

750000

usd

CY2024Q1

adn

Other Noncurrent Assets

OtherNoncurrentAssets

301000

usd

CY2024Q1

adn

Total Noncurrent Assets

TotalNoncurrentAssets

24923000

usd

CY2024Q1

adn

Total Assets

TotalAssets

32152000

usd

CY2024Q1

adn

Trade And Other Payables

TradeAndOtherPayables

5679000

usd

CY2024Q1

adn

Deferred Income From Grants Current

DeferredIncomeFromGrantsCurrent

7000

usd

CY2024Q1

adn

Contract Liabilities

ContractLiabilities

2280000

usd

CY2024Q1

adn

Loss Contingency Liabilities

LossContingencyLiabilities

5140000

usd

CY2024Q1

adn

Other Current Liabilities

OtherCurrentLiabilities

1816000

usd

CY2024Q1

adn

Operating Lease Liabilities

OperatingLeaseLiabilities

2164000

usd

CY2024Q1

adn

Income Tax Payable

IncomeTaxPayable

176000

usd

CY2024Q1

adn

Total Current Liabilities

TotalCurrentLiabilities

17262000

usd

CY2024Q1

adn

Longterm Operating Lease Liabilities

LongtermOperatingLeaseLiabilities

7852000

usd

CY2024Q1

adn

Defined Benefit Obligation

DefinedBenefitObligation

86000

usd

CY2024Q1

adn

Deferred Income From Grants Noncurrent

DeferredIncomeFromGrantsNoncurrent

202000

usd

CY2024Q1

adn

Other Longterm Liabilities

OtherLongtermLiabilities

671000

usd

CY2024Q1

adn

Total Noncurrent Liabilities

TotalNoncurrentLiabilities

8811000

usd

CY2024Q1

adn

Total Liabilities

TotalLiabilities

26073000

usd

CY2024Q1

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

197000000

usd

CY2024Q1

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-2406000

usd

CY2024Q1

adn

Accumulated Deficit

AccumulatedDeficit

-188515000

usd

CY2024Q1

adn

Total Stockholders Equity

TotalStockholdersEquity

6079000

usd

CY2023Q4

adn

Income Tax Payable

IncomeTaxPayable

179000

usd

CY2023Q4

adn

Total Current Liabilities

TotalCurrentLiabilities

11913000

usd

CY2023Q4

adn

Warrant Liability

WarrantLiability

59000

usd

CY2023Q4

adn

Longterm Operating Lease Liabilities

LongtermOperatingLeaseLiabilities

8230000

usd

CY2023Q4

adn

Defined Benefit Obligation

DefinedBenefitObligation

83000

usd

CY2023Q4

adn

Deferred Income From Grants Noncurrent

DeferredIncomeFromGrantsNoncurrent

320000

usd

CY2023Q4

adn

Other Longterm Liabilities

OtherLongtermLiabilities

684000

usd

CY2023Q4

adn

Total Noncurrent Liabilities

TotalNoncurrentLiabilities

9376000

usd

CY2023Q4

adn

Total Liabilities

TotalLiabilities

21289000

usd

CY2023Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

194941000

usd

CY2023Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-2334000

usd

CY2023Q4

adn

Accumulated Deficit

AccumulatedDeficit

-179159000

usd

CY2023Q4

adn

Total Stockholders Equity

TotalStockholdersEquity

13448000

usd

CY2023Q4

adn

Total Liabilities And Stockholders Equity

TotalLiabilitiesAndStockholdersEquity

34737000

usd

CY2024Q1

adn

Cash And Cash Equivalents

CashAndCashEquivalents

774000

usd

CY2024Q1

us-gaap

Restricted Cash Current

RestrictedCashCurrent

98000

usd

CY2024Q1

adn

Account Receivable Net

AccountReceivableNet

1085000

usd

CY2024Q1

adn

Contract Assets

ContractAssets

11000

usd

CY2024Q1

adn

Inventories

2077000

usd

CY2024Q1

adn

Prepaid Expenses And Other Current Assets

PrepaidExpensesAndOtherCurrentAssets

3184000

usd

CY2024Q1

adn

Total Current Assets

TotalCurrentAssets

7229000

usd

CY2024Q1

adn

Intangibles Net

IntangiblesNet

77000

usd

CY2024Q1

adn

Property And Equipment Net

PropertyAndEquipmentNet

20749000

usd

CY2024Q1

adn

Rightofuse Assets

RightofuseAssets

3046000

usd

CY2024Q1

adn

Restricted Cash Noncurrents

RestrictedCashNoncurrents

750000

usd

CY2024Q1

adn

Other Noncurrent Assets

OtherNoncurrentAssets

301000

usd

CY2024Q1

adn

Total Noncurrent Assets

TotalNoncurrentAssets

24923000

usd

CY2024Q1

adn

Total Assets

TotalAssets

32152000

usd

CY2024Q1

adn

Trade And Other Payables

TradeAndOtherPayables

5679000

usd

CY2024Q1

adn

Deferred Income From Grants Current

DeferredIncomeFromGrantsCurrent

7000

usd

CY2024Q1

adn

Contract Liabilities

ContractLiabilities

2280000

usd

CY2024Q1

adn

Other Current Liabilities

OtherCurrentLiabilities

1816000

usd

CY2024Q1

adn

Operating Lease Liabilities

OperatingLeaseLiabilities

2164000

usd

CY2024Q1

adn

Income Tax Payable

IncomeTaxPayable

176000

usd

CY2024Q1

adn

Total Current Liabilities

TotalCurrentLiabilities

17262000

usd

CY2024Q1

adn

Longterm Operating Lease Liabilities

LongtermOperatingLeaseLiabilities

7852000

usd

CY2024Q1

adn

Defined Benefit Obligation

DefinedBenefitObligation

86000

usd

CY2024Q1

adn

Deferred Income From Grants Noncurrent

DeferredIncomeFromGrantsNoncurrent

202000

usd

CY2024Q1

adn

Other Longterm Liabilities

OtherLongtermLiabilities

671000

usd

CY2024Q1

adn

Total Noncurrent Liabilities

TotalNoncurrentLiabilities

8811000

usd

CY2024Q1

adn

Total Liabilities

TotalLiabilities

26073000

usd

CY2024Q1

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

197000000

usd

CY2024Q1

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-2406000

usd

CY2024Q1

adn

Total Stockholders Equity

TotalStockholdersEquity

6079000

usd

CY2024Q1

adn

Total Liabilities And Stockholders Equity

TotalLiabilitiesAndStockholdersEquity

32152000

usd

CY2024Q1

ecd

Rule10b51 Arr Adopted Flag

Rule10b51ArrAdoptedFlag

false

CY2024Q1

ecd

Non Rule10b51 Arr Adopted Flag

NonRule10b51ArrAdoptedFlag

false

CY2024Q1

ecd

Rule10b51 Arr Trmntd Flag

Rule10b51ArrTrmntdFlag

false

CY2024Q1

ecd

Non Rule10b51 Arr Trmntd Flag

NonRule10b51ArrTrmntdFlag

false

CY2024Q1

adn

Total Liabilities And Stockholders Equity

TotalLiabilitiesAndStockholdersEquity

32152000

usd

CY2024Q1

ecd

Rule10b51 Arr Adopted Flag

Rule10b51ArrAdoptedFlag

false

CY2024Q1

ecd

Non Rule10b51 Arr Adopted Flag

NonRule10b51ArrAdoptedFlag

false

CY2024Q1

ecd

Rule10b51 Arr Trmntd Flag

Rule10b51ArrTrmntdFlag

false

CY2024Q1

ecd

Non Rule10b51 Arr Trmntd Flag

NonRule10b51ArrTrmntdFlag

false

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$ADN
ADVENT TECHNOLOGIES HOLDINGS, INC. Stock $adn

2024 Q1 Form 10-Q Financial Statement

#000182912624006791 Filed on October 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ADN ADVENT TECHNOLOGIES HOLDINGS, INC. Stock $adn

2024 Q1 Form 10-Q Financial Statement

#000182912624006791 Filed on October 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ADN
ADVENT TECHNOLOGIES HOLDINGS, INC. Stock $adn