$EFOI
ENERGY FOCUS, INC/DE Stock $efoi

$efoi Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000092416822000023 Filed on March 17, 2022

Income Statement

Concept	2021 Q4	2021 Q3	2021 Q2
Revenue	$2.405M	$2.749M	$2.074M
YoY Change	-35.8%	-53.91%	-37.81%
Cost Of Revenue	$2.216M	$2.186M	$1.681M
YoY Change	-4.07%	-52.35%	-15.61%
Gross Profit	$189.0K	$563.0K	$393.0K
YoY Change	-86.82%	-59.08%	-70.74%
Gross Profit Margin	7.86%	20.48%	18.95%
Selling, General & Admin	$2.081M	$1.968M	$2.268M
YoY Change	9.53%	-1.75%	14.95%
% of Gross Profit	1101.06%	349.56%	577.1%
Research & Development	$464.0K	$404.0K	$370.0K
YoY Change	10.48%	0.75%	18.21%
% of Gross Profit	245.5%	71.76%	94.15%
Depreciation & Amortization	$45.00K	$43.00K	$53.00K
YoY Change	12.5%	-10.42%	15.22%
% of Gross Profit	23.81%	7.64%	13.49%
Operating Expenses	$2.545M	$2.373M	$2.635M
YoY Change	9.7%	-0.63%	15.98%
Operating Profit	-$2.356M	-$1.810M	-$2.242M
YoY Change	165.91%	78.85%	141.33%
Interest Expense	-$272.0K	$177.0K	$216.0K
YoY Change	-125.9%	42.74%	148.28%
% of Operating Profit
Other Income/Expense, Net	-$18.00K	-$15.00K	-$15.00K
YoY Change	80.0%	-40.0%	-37.5%
Pretax Income	-$2.632M	-$1.140M	-$2.473M
YoY Change	-4486.67%	-2.56%	-43.02%
Income Tax	-$1.000K	$0.00
% Of Pretax Income
Net Earnings	-$2.631M	-$1.140M	-$2.473M
YoY Change	-4147.69%	-2.15%	-43.02%
Net Earnings / Revenue	-109.4%	-41.47%	-119.24%
Basic Earnings Per Share	-$0.50	-$0.22	-$0.59
Diluted Earnings Per Share	-$0.50	-$0.22	-$0.59
COMMON SHARES
Basic Shares Outstanding	5.312M shares	5.086M shares	4.211M shares
Diluted Shares Outstanding	5.312M shares	5.086M shares	4.211M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2021 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.394M	$1.294M	$2.235M
YoY Change	29.05%	-49.65%	-18.13%
Cash & Equivalents	$2.682M	$381.0K	$1.327M
Short-Term Investments	$712.0K	$913.0K	$908.0K
Other Short-Term Assets	$3.000K	$1.421M	$810.0K
YoY Change	200.0%	4.49%	19.12%
Inventory	$7.866M	$7.755M	$8.129M
Prepaid Expenses
Receivables	$1.240M	$1.628M	$1.149M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$13.42M	$12.10M	$12.32M
YoY Change	21.2%	-3.68%	4.24%
LONG-TERM ASSETS
Property, Plant & Equipment	$967.0K	$1.007M	$1.079M
YoY Change	130.24%	139.76%	160.0%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$0.00	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Total Long-Term Assets	$967.0K	$1.007M	$1.079M
YoY Change	-26.8%	-33.18%	-48.25%
TOTAL ASSETS
Total Short-Term Assets	$13.42M	$12.10M	$12.32M
Total Long-Term Assets	$967.0K	$1.007M	$1.079M
Total Assets	$14.39M	$13.11M	$13.40M
YoY Change	16.08%	-6.84%	-3.63%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.235M	$2.606M	$2.846M
YoY Change	-9.77%	-15.64%	8.75%
Accrued Expenses	$1.764M	$1.696M	$1.733M
YoY Change	24.93%	-18.07%	-4.78%
Deferred Revenue	$268.0K	$2.000K	$71.00K
YoY Change	272.22%
Short-Term Debt	$2.169M	$2.666M	$1.573M
YoY Change	-5.7%	31.33%	18.27%
Long-Term Debt Due	$1.720M	$1.603M	$1.529M
YoY Change	224.53%	186.25%	75.75%
Total Short-Term Liabilities	$8.156M	$8.573M	$7.752M
YoY Change	7.93%	-22.22%	-29.76%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$13.00K
YoY Change	-100.0%	-100.0%	-97.55%
Other Long-Term Liabilities	$26.00K	$30.00K	$34.00K
YoY Change
Total Long-Term Liabilities	$26.00K	$30.00K	$47.00K
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$8.156M	$8.573M	$7.752M
Total Long-Term Liabilities	$26.00K	$30.00K	$47.00K
Total Liabilities	$8.182M	$8.603M	$7.799M
YoY Change	0.49%	-27.88%	-36.04%
SHAREHOLDERS EQUITY
Retained Earnings	-$138.7M	-$136.1M	-$135.0M
YoY Change	6.03%	3.96%	4.02%
Common Stock	$145.0M	$140.6M	$140.6M
YoY Change	7.28%	5.68%	6.92%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.209M	$4.502M	$5.603M
YoY Change
Total Liabilities & Shareholders Equity	$14.39M	$13.11M	$13.40M
YoY Change	16.08%	-6.84%	-3.63%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021 Q2
OPERATING ACTIVITIES
Net Income	-$2.631M	-$1.140M	-$2.473M
YoY Change	-4147.69%	-2.15%	-43.02%
Depreciation, Depletion And Amortization	$45.00K	$43.00K	$53.00K
YoY Change	12.5%	-10.42%	15.22%
Cash From Operating Activities	-$1.345M	-$2.315M	-$3.322M
YoY Change	54.6%	163.07%	175.23%
INVESTING ACTIVITIES
Capital Expenditures	-$132.0K	$100.0K	$102.0K
YoY Change	164.0%	88.68%	43.66%
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities	-$132.0K	-$100.0K	-$102.0K
YoY Change	164.0%	88.68%	43.66%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	3.778M	$1.127M	$4.203M
YoY Change	1998.89%	44.49%	284.19%
NET CHANGE
Cash From Operating Activities	-1.345M	-$2.315M	-$3.322M
Cash From Investing Activities	-132.0K	-$100.0K	-$102.0K
Cash From Financing Activities	3.778M	$1.127M	$4.203M
Net Change In Cash	2.301M	-$1.288M	$779.0K
YoY Change	-410.95%	741.83%	-523.37%
FREE CASH FLOW
Cash From Operating Activities	-$1.345M	-$2.315M	-$3.322M
Capital Expenditures	-$132.0K	$100.0K	$102.0K
Free Cash Flow	-$1.213M	-$2.415M	-$3.424M
YoY Change	47.93%	158.84%	167.92%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000924168
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Entity Registrant Name EntityRegistrantName	ENERGY FOCUS, INC/DE
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-36583
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-3021850
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	32000 Aurora Road
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite B
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Solon
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	44139
CY2021	dei	City Area Code CityAreaCode	440
CY2021	dei	Local Phone Number LocalPhoneNumber	715.1300
CY2021	dei	Security12b Title Security12bTitle	Common stock, par value $0.0001 per share
CY2021	dei	Trading Symbol TradingSymbol	EFOI
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Entity Small Business EntitySmallBusiness	true
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	17100000	USD
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CY2021	dei	Auditor Firm AuditorFirmId	1808
CY2021	dei	Auditor Name AuditorName	GBQ Partners, LLC
CY2021	dei	Auditor Location AuditorLocation	Columbus, Ohio
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CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2749000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	510000	USD
CY2020	us-gaap	Stock And Warrants Issued During Period Value Preferred Stock And Warrants StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants	2235000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	-1636000	USD
CY2020	efoi	Adjustments To Additional Paid In Capital Warrant Reclassified AdjustmentsToAdditionalPaidInCapitalWarrantReclassified	1405000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	131000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5981000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4255000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	80000	USD
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9500000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	969000	USD
CY2021	us-gaap	Stock And Warrants Issued During Period Value Preferred Stock And Warrants StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants	801000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	429000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-7886000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	6209000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-7886000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5981000	USD
CY2021	efoi	Gain Loss From Employee Retention Tax Credit GainLossFromEmployeeRetentionTaxCredit	876000	USD
CY2020	efoi	Gain Loss From Employee Retention Tax Credit GainLossFromEmployeeRetentionTaxCredit	0	USD
CY2021	efoi	Gain Loss On Forgiveness Of Debt GainLossOnForgivenessOfDebt	801000	USD
CY2020	efoi	Gain Loss On Forgiveness Of Debt GainLossOnForgivenessOfDebt	0	USD
CY2021	us-gaap	Depreciation Depreciation	188000	USD
CY2020	us-gaap	Depreciation Depreciation	184000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	429000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	131000	USD
CY2021	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	USD
CY2020	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	1086000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-20000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	156000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	-610000	USD
CY2021	efoi	Increase Decrease In Provision For Warranties IncreaseDecreaseInProvisionForWarranties	68000	USD
CY2020	efoi	Increase Decrease In Provision For Warranties IncreaseDecreaseInProvisionForWarranties	31000	USD
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	230000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	395000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-8000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-783000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-377000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2381000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1137000	USD
CY2021	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-257000	USD
CY2020	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	670000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-669000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	18000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-423000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1096000	USD
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-380000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	349000	USD
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	196000	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	54000	USD
CY2021	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-1879000	USD
CY2020	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	3530000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-9765000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2451000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	443000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	223000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-443000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-223000	USD
CY2021	efoi	Proceeds From Issuance Of Common Stock And Warrants ProceedsFromIssuanceOfCommonStockAndWarrants	9500000	USD
CY2020	efoi	Proceeds From Issuance Of Common Stock And Warrants ProceedsFromIssuanceOfCommonStockAndWarrants	2749000	USD
CY2021	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	801000	USD
CY2020	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	918000	USD
CY2021	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	969000	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	510000	USD
CY2021	efoi	Proceeds From Paycheck Protection Program ProceedsFromPaycheckProtectionProgram	0	USD
CY2020	efoi	Proceeds From Paycheck Protection Program ProceedsFromPaycheckProtectionProgram	795000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	80000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	100000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3000	USD
CY2021	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	30000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	320000	USD
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1306000	USD
CY2021	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1515000	USD
CY2020	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10712000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4160000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	504000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1486000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2178000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	692000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2682000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2178000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2682000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1836000	USD
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	342000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2682000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2178000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	381000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	269000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	4000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	4000	USD
CY2021	us-gaap	Nature Of Operations NatureOfOperations	NATURE OF OPERATIONS<div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Energy Focus, Inc. engages primarily in the design, development, manufacturing, marketing and sale of energy-efficient lighting systems and controls and ultraviolet-C light disinfection (“UVCD”) products. We develop, market and sell high quality light-emitting diode (“LED”) lighting and controls products and UVCD products in the commercial market and military maritime market (“MMM”), and began to expand our offerings into the consumer market in the fourth quarter of 2021. Our mission is to enable our customers to run their facilities, offices and homes with greater energy efficiency, productivity, and human health and wellness through advanced LED retrofit and UVCD solutions. Our goal is to be the LED and human-centric lighting (“HCL”) technology and market leader for the most demanding applications where performance, quality, value, environmental impact and health are considered paramount. We specialize in LED lighting retrofit by replacing fluorescent, high-intensity discharge lighting and other types of lamps in institutional buildings for primarily indoor lighting applications with our innovative, high-quality commercial and military-grade tubular LED (“TLED”) products, as well as other LED and lighting control products for commercial and consumer applications. In late 2020, we announced the launch of our UVCD product portfolio. With initial development complete and two products now brought to market, we anticipate the development of additional UVCD products in 2022.</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The LED lighting industry continues to be characterized by increasing challenges in differentiating product offerings, competition and price erosion. We have been experiencing these industry forces in both our military business since 2016 and in our commercial segment where we once commanded significant price premiums for our flicker-free TLEDs with primarily 10-year warranties. In more recent years, we have focused on redesigning our products for lower costs and consolidating our supply chain in order to price our products more competitively. Despite these efforts, our legacy products continue to face aggressive pricing competition. These trends are not unique to Energy Focus as evidenced by the increasing number of industry peers facing challenges, exiting LED lighting, selling assets and even going out of business. In addition to continuous cost reductions, our strategy to combat these trends is to move up the value chain, with more innovative and differentiated products and solutions that support a premium. Two specific examples of these</span><span style="color:#ee2724;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">products we have recently developed include the RedCap</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7.8pt;font-style:italic;font-weight:400;line-height:120%;position:relative;top:-4.2pt;vertical-align:baseline">®</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, our emergency backup battery integrated TLED, and EnFocus™, our new dimmable/tunable lighting and powerline control platform that we launched in 2020. We believe our revamped go-to-market strategy that focuses more on direct-sales and additional sales representatives and listens to the voice of the customer, has informed more impactful product development efforts that could eventually translate into larger addressable markets and greater sales growth for us.</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During 2021, we continued to see certain benefits from the relaunch efforts (described below) that began in 2019, in addition to a number of strategic sourcing projects completed during 2020. It is our belief that the continued momentum of the efforts undertaken in 2020 and into 2021, along with the development and launch of new and innovative products, will over time result in improved sales and bottom-line performance for the Company. We launched our EnFocus™ platform during the second quarter of 2020 and continued to receive positive feedback from the market. The EnFocus™ powerline control platform offers two immediately available product lines: EnFocus™ DM, which provides a dimmable lighting solution, and EnFocus™ DCT, which provides both a dimmable and color tunable lighting solution. EnFocus™ enables buildings to have dimmable, color tunable and circadian-ready lighting using existing wiring, without requiring any wireless communications, through a relatively simple upgrade with EnFocus™ switches and replacement LED lamps, a more environmentally sustainable solution compared with replacing each lighting fixture.</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, in response to the COVID-19 pandemic and an anticipated increase in sanitation and hygiene demand for buildings, facilities and homes, we started developing advanced UVCD products for both the consumer and the commercial and industrial markets in the first quarter of 2020. In late 2020, we announced the nUVo™ portable disinfection devices for offices and homes. Sales of these products began during the fourth quarter of 2021.</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Prior to 2019, the Company experienced significant sales declines, operating losses and increases in its inventory. Beginning in 2019, significant restructuring efforts were undertaken. The Company replaced the entire senior management team, significantly reduced non-critical expenses, minimized the amount of inventory the Company was purchasing, dramatically changed the composition of our board of directors (“Board of Directors”) and the executive team, and recruited new departmental leaders across the Company. The cost savings efforts undertaken included phased actions to reduce costs to minimize cash usage. Initial actions included the elimination of certain positions, restructuring of the sales organization and incentive plan, flattening of the senior management team, additional operational streamlining, management compensation reductions, and outsourcing of certain functions including certain elements of supply chain and marketing.</span></div>On June 11, 2020, in accordance with previous stockholder approval, our Board of Directors effected a 1-for-5 (the “Split Ratio”) reverse stock split of the Company’s common stock, par value $0.0001 per share. The reverse stock split became effective immediately upon the filing of the Certificate of Amendment to the Company’s Certificate of Incorporation, as amended (the “Certificate of Incorporation”), with the Delaware Secretary of State (the “Effective Time”). At the Effective Time, every five shares of common stock issued and outstanding automatically combined into one validly issued, fully paid and non-assessable share of common stock. No fractional shares were issued as a result of the reverse stock split. The $0.0001 par value per share of common stock and other terms of the common stock were not affected by the reverse stock split. The number of authorized shares of common stock under the Certificate of Incorporation remained unchanged at 50,000,000 shares. Proportional adjustments were made to the conversion and exercise prices of our outstanding warrants and stock options, and to the number of shares issued and issuable under our stock incentive plans in connection with the reverse stock split. The information presented in the financial statements for all prior periods have been retroactively adjusted to reflect the reverse stock split. Preferred shares outstanding were not affected by the reverse stock split and, as such, those shares have not been adjusted.
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of estimates</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of 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 at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods presented. Estimates include, but are not limited to, the establishment of reserves for accounts receivable, sales returns, inventory excess and obsolescence reserve and warranty claims, the useful lives for property and equipment and stock-based compensation. In addition, estimates and assumptions associated with the determination of the fair value of financial instruments and evaluation of long-lived assets for impairment requires considerable judgment. Actual results could differ from those estimates and such differences could be material.</span></div>
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2700000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2200000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2200000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	300000	USD
CY2021	efoi	Increase Decrease In Inventory Levels Gross IncreaseDecreaseInInventoryLevelsGross	2400000	USD
CY2021	efoi	Increase Decrease In Inventory Reserves IncreaseDecreaseInInventoryReserves	200000	USD
CY2020	efoi	Increase Decrease In Inventory Levels Gross IncreaseDecreaseInInventoryLevelsGross	-1200000	USD
CY2020	efoi	Increase Decrease In Inventory Reserves IncreaseDecreaseInInventoryReserves	600000	USD
CY2021	efoi	Contract With Customer Payment Terms ContractWithCustomerPaymentTerms	P30D
CY2020Q1	efoi	Payments For Clearing Fees PaymentsForClearingFees	231000	USD
CY2020Q1	efoi	Debt Instrument Proceeds To Be Paid To Lender Percent DebtInstrumentProceedsToBePaidToLenderPercent	0.10
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	237892	shares
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Certain risks and concentrations</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Historically our products were sold through a direct sales model, which included a combination of direct sales employees, electrical and lighting contractors, and distributors. We utilize a third-party accounts receivable insurance and credit assessment company. Although we maintain allowances for potential credit losses that we believe to be adequate, a payment default on a significant sale could materially and adversely affect our operating results and financial condition, although we have mitigated this risk somewhat through the accounts receivable insurance program.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have certain customers whose net sales individually represented 10% or more of our total net sales, or whose net trade accounts receivable balance individually represented 10% or more of our total net trade accounts receivable, as follows:</span></div><div style="padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">In 2021, two customers accounted for 43% of net sales, with sales to our primary distributor for the U.S. Navy accounting for approximately 30% and sales to a regional commercial lighting retrofit company accounting for approximately 13% of net sales. When sales to our primary distributor for the U.S. Navy are combined with sales to shipbuilders for the U.S. Navy, total net sales of products for the U.S. Navy comprised approximately 38% of net sales for the same period. In 2020, two customers accounted for 62% of net sales and total net sales of products to the U.S. Navy represented 53% of net sales.</span></div><div style="margin-bottom:10pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">At December 31, 2021, a distributor to the U.S. Department of Defense accounted for 20% of our net trade accounts receivable and a shipbuilder for the U.S. Navy accounted for 36% of our net trade accounts receivable. At December 31, 2020, a distributor to the U.S. Navy accounted for 28% of our net trade accounts receivable and a shipbuilder for the U.S. Navy accounted for 21% of our net trade accounts receivable.</span></div><div style="margin-bottom:10pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We require substantial amounts of purchased materials from selected vendors. With specific materials, all of our purchases are from a single vendor. The availability and costs of materials may be subject to change due to, among other things, new laws or regulations, suppliers’ allocation to other purchasers, interruptions in production by suppliers, global health issues such as the COVID-19 pandemic, and changes in exchange rates and worldwide price and demand levels. Our inability to obtain adequate supplies of materials for our products at favorable prices could have a material adverse effect on our business, financial position, or results of operations by decreasing our profit margins and by hindering our ability to deliver products to our customers on a timely basis. Additionally, certain vendors require advance deposits prior to the fulfillment of orders. Deposits paid on unfulfilled orders totaled $0.7 million and $0.8 million at December 31, 2021 and 2020, respectively.</span></div>
CY2021Q4	us-gaap	Supplies Supplies	700000	USD
CY2020Q4	us-gaap	Supplies Supplies	800000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-7886000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5981000	USD
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4561000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4561000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3270000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3270000	shares
CY2021	us-gaap	Advertising Expense AdvertisingExpense	400000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	100000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	227000	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	195000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	-41000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	33000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	47000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	19000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	-62000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	20000	USD
CY2021Q4	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	295000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	227000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-7900000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-6000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-9800000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2500000	USD
CY2021	us-gaap	Restructuring Costs RestructuringCosts	-21000	USD
CY2020	us-gaap	Restructuring Costs RestructuringCosts	-60000	USD
CY2021Q2	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1500000	USD
CY2020Q3	efoi	Debt Instrument Number Of Credit Facilities DebtInstrumentNumberOfCreditFacilities	2	creditFacility
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	1714000	USD
CY2020Q4	efoi	Adjustments To Additional Paid In Capital Warrant Reclassified AdjustmentsToAdditionalPaidInCapitalWarrantReclassified	1400000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4255000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	6209000	USD
CY2021Q4	efoi	Lessee Operating Lease Interest Rate Effective Rate LesseeOperatingLeaseInterestRateEffectiveRate	0.1593
CY2021Q4	us-gaap	Lessee Operating Lease Discount Rate LesseeOperatingLeaseDiscountRate	0.0725
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P0Y3M18D
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	300000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P0Y9M18D
CY2021	us-gaap	Sublease Income SubleaseIncome	112000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	105000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	558000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	597000	USD
CY2021	efoi	Operating Lease Cost Net Of Sublease Income OperatingLeaseCostNetOfSubleaseIncome	446000	USD
CY2020	efoi	Operating Lease Cost Net Of Sublease Income OperatingLeaseCostNetOfSubleaseIncome	492000	USD
CY2021	efoi	Restructured Lease Sublease Income RestructuredLeaseSubleaseIncome	136000	USD
CY2020	efoi	Restructured Lease Sublease Income RestructuredLeaseSubleaseIncome	272000	USD
CY2021	efoi	Restructured Lease Operating Lease Cost RestructuredLeaseOperatingLeaseCost	110000	USD
CY2020	efoi	Restructured Lease Operating Lease Cost RestructuredLeaseOperatingLeaseCost	237000	USD
CY2021	efoi	Restructured Lease Operating Lease Cost Net Of Sublease Income RestructuredLeaseOperatingLeaseCostNetOfSubleaseIncome	-26000	USD
CY2020	efoi	Restructured Lease Operating Lease Cost Net Of Sublease Income RestructuredLeaseOperatingLeaseCostNetOfSubleaseIncome	-35000	USD
CY2021	us-gaap	Lease Cost LeaseCost	420000	USD
CY2020	us-gaap	Lease Cost LeaseCost	457000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	292000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	794000	USD
CY2021Q4	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	0	USD
CY2020Q4	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	107000	USD
CY2021Q4	efoi	Operating Lease Rightof Use Asset Including Restructured Leases OperatingLeaseRightofUseAssetIncludingRestructuredLeases	292000	USD
CY2020Q4	efoi	Operating Lease Rightof Use Asset Including Restructured Leases OperatingLeaseRightofUseAssetIncludingRestructuredLeases	901000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	351000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	916000	USD
CY2021Q4	efoi	Restructured Operating Lease Liability RestructuredOperatingLeaseLiability	0	USD
CY2020Q4	efoi	Restructured Operating Lease Liability RestructuredOperatingLeaseLiability	168000	USD
CY2021Q4	efoi	Operating Lease Liability Including Restructured Leases OperatingLeaseLiabilityIncludingRestructuredLeases	351000	USD
CY2020Q4	efoi	Operating Lease Liability Including Restructured Leases OperatingLeaseLiabilityIncludingRestructuredLeases	1084000	USD
CY2021Q4	efoi	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	13000	USD
CY2020Q4	efoi	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	13000	USD
CY2021Q4	efoi	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	12000	USD
CY2020Q4	efoi	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	9000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	4000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	332000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	19000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	4000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	3000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	1000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	359000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	8000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	0	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	351000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	532000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	537000	USD
CY2021	efoi	Restructured Leases Operating Lease Payments RestructuredLeasesOperatingLeasePayments	35000	USD
CY2020	efoi	Restructured Leases Operating Lease Payments RestructuredLeasesOperatingLeasePayments	69000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3000	USD
CY2021Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	3882000	USD
CY2020Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	2695000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	7034000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5840000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	3050000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	2894000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	7866000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	5641000	USD
CY2020Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2894000	USD
CY2019Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	3518000	USD
CY2021	efoi	Inventory Valuation Reserves Provision Accrual InventoryValuationReservesProvisionAccrual	-281000	USD
CY2020	efoi	Inventory Valuation Reserves Provision Accrual InventoryValuationReservesProvisionAccrual	281000	USD
CY2021	efoi	Inventory Valuation Reserves Sales Of Inventory InventoryValuationReservesSalesOfInventory	125000	USD
CY2020	efoi	Inventory Valuation Reserves Sales Of Inventory InventoryValuationReservesSalesOfInventory	343000	USD
CY2021Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	3050000	USD
CY2020Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2894000	USD
CY2021	efoi	Increase Decrease In Inventory Levels Gross IncreaseDecreaseInInventoryLevelsGross	2400000	USD
CY2021	efoi	Increase Decrease In Inventory Reserves IncreaseDecreaseInInventoryReserves	200000	USD
CY2020	efoi	Increase Decrease In Inventory Levels Gross IncreaseDecreaseInInventoryLevelsGross	-1200000	USD
CY2020	efoi	Increase Decrease In Inventory Reserves IncreaseDecreaseInInventoryReserves	600000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	13000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	13000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	3477000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	3084000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	2802000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	2664000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	675000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	420000	USD
CY2020	us-gaap	Depreciation Depreciation	200000	USD
CY2021	us-gaap	Depreciation Depreciation	200000	USD
CY2021Q4	us-gaap	Prepaid Insurance PrepaidInsurance	131000	USD
CY2020Q4	us-gaap	Prepaid Insurance PrepaidInsurance	126000	USD
CY2021Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	253000	USD
CY2020Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	233000	USD
CY2021Q4	us-gaap	Prepaid Rent PrepaidRent	74000	USD
CY2020Q4	us-gaap	Prepaid Rent PrepaidRent	80000	USD
CY2021Q4	us-gaap	Security Deposit SecurityDeposit	18000	USD
CY2020Q4	us-gaap	Security Deposit SecurityDeposit	0	USD
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	342000	USD
CY2021Q4	efoi	Payroll Tax Credit Employee Retention Credit Under The Cares Act Current PayrollTaxCreditEmployeeRetentionCreditUnderTheCARESActCurrent	445000	USD
CY2020Q4	efoi	Payroll Tax Credit Employee Retention Credit Under The Cares Act Current PayrollTaxCreditEmployeeRetentionCreditUnderTheCARESActCurrent	0	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	3000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1000	USD
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	924000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	782000	USD
CY2020Q3	efoi	Debt Instrument Number Of Credit Facilities DebtInstrumentNumberOfCreditFacilities	2	creditFacility
CY2020Q3	efoi	Line Of Credit Facility Available Amount Based On Qualified Accounts LineOfCreditFacilityAvailableAmountBasedOnQualifiedAccounts	4500000	USD
CY2021	efoi	Percentage Of Series A Preferred Stock Eligible To Vote PercentageOfSeriesAPreferredStockEligibleToVote	0.1107
CY2021Q4	us-gaap	Purchase Obligation PurchaseObligation	1700000	USD
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q1	efoi	Percentage Of Series A Preferred Stock Eligible To Vote PercentageOfSeriesAPreferredStockEligibleToVote	0.1107
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	237892	shares
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	429000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	131000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	300000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	200000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y8M12D
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y1M6D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	155031	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.23
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	112350	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	2.68
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	33774	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	9.56
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	12157	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.11
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	221450	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	3.45
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	88240	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	5.07
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	36706	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	5.35
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1650	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	49.18
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	4225	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	1.96
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	267109	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	3.46
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	231462	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	3.41
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	92121	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	3.28
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	4225	shares
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	12157	shares
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	426000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	191000	USD
CY2021Q4	us-gaap	Share Price SharePrice	4.27
CY2021Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	267109	shares
CY2021	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P8Y2M12D
CY2021Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	3.46
CY2021Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	92121	shares
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P7Y7M6D
CY2021Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	3.28
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-5000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.097
CY2020Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	20000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	17318000	USD
CY2021Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	49000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.056
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.327
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.260
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.020
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.001
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1550000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1787000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	73000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	225000	USD
CY2021Q4	efoi	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	88000	USD
CY2020Q4	efoi	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	271000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	14510000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18932000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	16363000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	9600000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	7100000	USD
CY2021Q4	efoi	Deferred Tax Assets Operating Loss Carryforwards Portion Available After Application Of Irc Section382 Limitations DeferredTaxAssetsOperatingLossCarryforwardsPortionAvailableAfterApplicationOfIRCSection382Limitations	71000000	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	9600000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	7100000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	37500000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2021Q4	efoi	Employer Deferred Payroll Taxes Liability Cares Act EmployerDeferredPayrollTaxesLiabilityCARESAct	77000	USD
CY2021	us-gaap	Revenues Revenues	9865000	USD
CY2020	us-gaap	Revenues Revenues	16828000	USD
CY2021	us-gaap	Revenues Revenues	9865000	USD
CY2020	us-gaap	Revenues Revenues	16828000	USD
CY2020Q4	efoi	Longlived Assets Locatedin Us Percent LonglivedAssetsLocatedinUSPercent	1
CY2021Q4	efoi	Longlived Assets Locatedin Us Percent LonglivedAssetsLocatedinUSPercent	1
CY2021Q3	efoi	Payroll Tax Credit Employee Retention Credit Under The Cares Act PayrollTaxCreditEmployeeRetentionCreditUnderTheCARESAct	431000	USD
CY2021Q2	efoi	Payroll Tax Credit Employee Retention Credit Under The Cares Act Current PayrollTaxCreditEmployeeRetentionCreditUnderTheCARESActCurrent	445000	USD
CY2021Q4	efoi	Payroll Tax Credit Employee Retention Credit Under The Cares Act Current PayrollTaxCreditEmployeeRetentionCreditUnderTheCARESActCurrent	445000	USD
CY2021Q4	us-gaap	Revenues Revenues	2405000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.45
CY2021Q3	us-gaap	Revenues Revenues	2749000	USD
CY2021Q2	us-gaap	Revenues Revenues	2074000	USD
CY2021Q1	us-gaap	Revenues Revenues	2637000	USD
CY2021Q4	us-gaap	Gross Profit GrossProfit	189000	USD
CY2021Q3	us-gaap	Gross Profit GrossProfit	563000	USD
CY2021Q2	us-gaap	Gross Profit GrossProfit	393000	USD
CY2021Q1	us-gaap	Gross Profit GrossProfit	553000	USD
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	-2631000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-1140000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	-2473000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-1642000	USD
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.50
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.50
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.22
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.22
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.59
CY2021Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5312000	shares
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.59
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.45
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5086000	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4211000	shares
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4211000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3612000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3612000	shares
CY2021Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5312000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5086000	shares
CY2020Q4	us-gaap	Revenues Revenues	3746000	USD
CY2020Q3	us-gaap	Revenues Revenues	5964000	USD
CY2020Q2	us-gaap	Revenues Revenues	3335000	USD
CY2020Q1	us-gaap	Revenues Revenues	3783000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	1434000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	1376000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	1343000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	1032000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	65000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-1165000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-4340000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-541000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.18
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.35
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.36
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.18
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.35
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.36
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3491000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3308000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3192000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3086000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4307000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3308000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3192000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3086000	shares

Files In Submission

Name	View Source	Status
0000924168-22-000023-index-headers.html	Edgar Link	pending
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$EFOI
ENERGY FOCUS, INC/DE Stock $efoi

2021 Q4 Form 10-K Financial Statement

#000092416822000023 Filed on March 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EFOI ENERGY FOCUS, INC/DE Stock $efoi

2021 Q4 Form 10-K Financial Statement

#000092416822000023 Filed on March 17, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EFOI
ENERGY FOCUS, INC/DE Stock $efoi