2019 Q4 Form 10-K Financial Statement

#000156459021009423 Filed on February 26, 2021

View on sec.gov

Income Statement

Concept 2019 Q4 2019 Q3 2019 Q2
Revenue $115.8M $114.1M $156.4M
YoY Change -17.35% -18.7% 22.13%
Cost Of Revenue $68.50M $67.76M $91.38M
YoY Change -19.13% -17.25% 17.07%
Gross Profit $47.21M $46.33M $65.02M
YoY Change -14.77% -20.73% 30.04%
Gross Profit Margin 40.77% 40.61% 41.57%
Selling, General & Admin $30.30M $30.91M $33.62M
YoY Change 7.83% 0.53% 4.8%
% of Gross Profit 64.18% 66.72% 51.71%
Research & Development $29.60M $31.84M $32.06M
YoY Change -4.82% 6.55% 4.34%
% of Gross Profit 62.7% 68.71% 49.32%
Depreciation & Amortization $4.500M $3.100M $3.100M
YoY Change 15.38% 0.0% -20.51%
% of Gross Profit 9.53% 6.69% 4.77%
Operating Expenses $60.00M $62.75M $65.68M
YoY Change 1.35% 3.5% 4.58%
Operating Profit -$14.07M -$20.29M $562.0K
YoY Change 271.93% 831.07% -104.39%
Interest Expense $4.000M $128.0K $127.0K
YoY Change -148.78% -4.48% -3.79%
% of Operating Profit 22.6%
Other Income/Expense, Net -$800.0K $1.616M -$205.0K
YoY Change -157.14% 703.98% -5.53%
Pretax Income -$10.90M -$18.41M $3.407M
YoY Change 2.83% -671.61% -130.26%
Income Tax $800.0K $27.72M -$588.0K
% Of Pretax Income -17.26%
Net Earnings -$11.62M -$46.12M $3.995M
YoY Change 37.61% -707.76% -152.09%
Net Earnings / Revenue -10.04% -40.43% 2.55%
Basic Earnings Per Share -$0.25 -$0.96 $0.08
Diluted Earnings Per Share -$0.25 -$0.96 $0.08
COMMON SHARES
Basic Shares Outstanding 47.82M 47.80M
Diluted Shares Outstanding 47.82M 48.04M

Balance Sheet

Concept 2019 Q4 2019 Q3 2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments $79.00M $125.2M $137.7M
YoY Change -27.39% 25.07% 29.42%
Cash & Equivalents $73.80M $96.41M $106.8M
Short-Term Investments $5.201M $28.80M $30.90M
Other Short-Term Assets $7.900M $10.30M $8.900M
YoY Change -26.17% -0.96% -6.32%
Inventory $98.31M $104.9M $95.11M
Prepaid Expenses
Receivables $90.53M $90.65M $116.7M
Other Receivables $16.57M $18.93M $24.98M
Total Short-Term Assets $320.3M $350.0M $383.4M
YoY Change -9.88% 0.43% 12.53%
LONG-TERM ASSETS
Property, Plant & Equipment $68.09M $73.38M $78.81M
YoY Change -15.56% -9.96% -4.94%
Goodwill $6.968M $6.968M $6.968M
YoY Change -1.94% 99.54%
Intangibles $27.82M $29.11M $30.50M
YoY Change -16.16%
Long-Term Investments $94.50M $90.60M $87.30M
YoY Change -13.14% -37.17% -39.54%
Other Assets $19.88M $23.28M $13.82M
YoY Change 250.79% -50.36% -57.38%
Total Long-Term Assets $224.8M $229.9M $256.4M
YoY Change -17.53% -23.45% -14.21%
TOTAL ASSETS
Total Short-Term Assets $320.3M $350.0M $383.4M
Total Long-Term Assets $224.8M $229.9M $256.4M
Total Assets $545.1M $579.9M $639.8M
YoY Change -13.2% -10.62% 0.03%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $44.87M $52.84M $63.83M
YoY Change -25.28% -18.7% 6.11%
Accrued Expenses $27.80M $15.70M $14.33M
YoY Change 136.68% -42.29% -3.07%
Deferred Revenue $11.96M $14.02M $12.91M
YoY Change -33.32% -17.54% -9.76%
Short-Term Debt $0.00 $0.00 $0.00
YoY Change
Long-Term Debt Due $24.60M $25.60M $25.60M
YoY Change 2360.0%
Total Short-Term Liabilities $112.7M $128.2M $145.4M
YoY Change -4.49% 3.77% 25.21%
LONG-TERM LIABILITIES
Long-Term Debt $0.00 $0.00 $0.00
YoY Change -100.0% -100.0% -100.0%
Other Long-Term Liabilities $8.385M $52.19M $44.18M
YoY Change 235.4% 44.57% 15.66%
Total Long-Term Liabilities $8.385M $52.19M $44.18M
YoY Change -69.06% -15.41% -30.75%
TOTAL LIABILITIES
Total Short-Term Liabilities $112.7M $128.2M $145.4M
Total Long-Term Liabilities $8.385M $52.19M $44.18M
Total Liabilities $164.7M $184.9M $193.8M
YoY Change -9.38% -0.15% 7.73%
SHAREHOLDERS EQUITY
Retained Earnings $806.7M $827.8M $878.6M
YoY Change -8.74% -8.06%
Common Stock $275.4M $273.7M $271.8M
YoY Change 2.59%
Preferred Stock
YoY Change
Treasury Stock (at cost) $685.3M $690.0M $690.3M
YoY Change -0.93%
Treasury Stock Shares $31.64M $31.83M $31.84M
Shareholders Equity $380.4M $395.0M $446.0M
YoY Change
Total Liabilities & Shareholders Equity $545.1M $579.9M $639.8M
YoY Change -13.2% -10.62% 0.03%

Cashflow Statement

Concept 2019 Q4 2019 Q3 2019 Q2
OPERATING ACTIVITIES
Net Income -$11.62M -$46.12M $3.995M
YoY Change 37.61% -707.76% -152.09%
Depreciation, Depletion And Amortization $4.500M $3.100M $3.100M
YoY Change 15.38% 0.0% -20.51%
Cash From Operating Activities -$12.60M -$900.0K $1.300M
YoY Change -285.29% -78.57% -80.6%
INVESTING ACTIVITIES
Capital Expenditures -$3.500M -$1.700M -$2.400M
YoY Change 45.83% 13.33% 9.09%
Acquisitions
YoY Change
Other Investing Activities -$2.700M -$1.400M $2.100M
YoY Change -118.37% -128.57% -91.06%
Cash From Investing Activities -$6.100M -$3.200M -$300.0K
YoY Change -149.59% -194.12% -101.42%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities -5.300M -4.300M -3.800M
YoY Change -19.7% -8.51% -44.93%
NET CHANGE
Cash From Operating Activities -12.60M -900.0K 1.300M
Cash From Investing Activities -6.100M -3.200M -300.0K
Cash From Financing Activities -5.300M -4.300M -3.800M
Net Change In Cash -24.00M -8.400M -2.800M
YoY Change -292.0% 52.73% -113.33%
FREE CASH FLOW
Cash From Operating Activities -$12.60M -$900.0K $1.300M
Capital Expenditures -$3.500M -$1.700M -$2.400M
Free Cash Flow -$9.100M $800.0K $3.700M
YoY Change -198.91% -129.63% -58.43%

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CY2018 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-17257000
CY2019 adtn Gain Loss On Contingency
GainLossOnContingency
1230000
CY2019 us-gaap Gain Loss On Sale Of Insurance Block
GainLossOnSaleOfInsuranceBlock
1000000
CY2018 us-gaap Business Combination Bargain Purchase Gain Recognized Amount
BusinessCombinationBargainPurchaseGainRecognizedAmount
11322000
CY2020 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-216000
CY2019 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
33000
CY2018 us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-17000
CY2020 us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
7269000
CY2020 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
25582000
CY2019 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
-1252000
CY2018 us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
-24192000
CY2020 us-gaap Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
5239000
CY2019 us-gaap Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
-2749000
CY2018 us-gaap Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
-10727000
CY2020 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
4543000
CY2019 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
-13494000
CY2018 us-gaap Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
-3799000
CY2020 us-gaap Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
5093000
CY2019 us-gaap Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
-4598000
CY2018 us-gaap Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
-3226000
CY2020 us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
-2294000
CY2019 us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
-8705000
CY2018 us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
7690000
CY2020 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
-16518000
CY2019 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
-2472000
CY2018 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
55454000
CY2020 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
6413000
CY2019 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
9494000
CY2018 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
8110000
CY2020 us-gaap Proceeds From Sale Of Property Plant And Equipment
ProceedsFromSaleOfPropertyPlantAndEquipment
2000
CY2020 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
105100000
CY2019 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
47268000
CY2018 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
153649000
CY2020 us-gaap Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
56767000
CY2019 us-gaap Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
48578000
CY2018 us-gaap Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
123209000
CY2020 us-gaap Payments To Acquire Notes Receivable
PaymentsToAcquireNotesReceivable
523000
CY2019 us-gaap Proceeds From Life Insurance Policies
ProceedsFromLifeInsurancePolicies
1000000
CY2019 adtn Payments For Proceeds From Business Acquisition
PaymentsForProceedsFromBusinessAcquisition
-13000
CY2018 adtn Payments For Proceeds From Business Acquisition
PaymentsForProceedsFromBusinessAcquisition
22045000
CY2020 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
41399000
CY2019 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-9791000
CY2020 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
17334000
CY2019 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
17212000
CY2018 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
17267000
CY2020 us-gaap Repayments Of Debt
RepaymentsOfDebt
24600000
CY2020 us-gaap Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
1043000
CY2019 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
526000
CY2018 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
1483000
CY2018 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
15532000
CY2019 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
1000000
CY2018 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
1100000
CY2020 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-42977000
CY2019 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-17870000
CY2018 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-32416000
CY2020 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
-18096000
CY2019 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
-30133000
CY2018 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
23323000
CY2020 us-gaap Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
4502000
CY2019 us-gaap Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
-1598000
CY2018 us-gaap Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
-4252000
CY2019Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
73773000
CY2020 us-gaap Interest Paid Net
InterestPaidNet
24000
CY2019 us-gaap Interest Paid Net
InterestPaidNet
512000
CY2018 us-gaap Interest Paid Net
InterestPaidNet
534000
CY2020 us-gaap Income Taxes Paid
IncomeTaxesPaid
7609000
CY2019 us-gaap Income Taxes Paid
IncomeTaxesPaid
9357000
CY2018 us-gaap Income Taxes Paid
IncomeTaxesPaid
4104000
CY2018 us-gaap Noncash Or Part Noncash Acquisition Value Of Assets Acquired1
NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1
62000
CY2018 adtn Non Cash Or Part Non Cash Contingent Payment
NonCashOrPartNonCashContingentPayment
1230000
CY2020 us-gaap Use Of Estimates
UseOfEstimates
<p style="text-align:justify;margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Use of Estimates</p> <p style="text-align:justify;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">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, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Our more significant estimates include excess and obsolete inventory reserves, warranty reserves, customer rebates, determination and accrual of the deferred revenue components of multiple element sales agreements, estimated costs to complete obligations associated with deferred revenues and network installations, estimated income tax provision and income tax contingencies, fair value of stock-based compensation, assessment of goodwill and other intangibles for impairment, estimated lives of intangible assets, estimated pension liability, fair value of investments, evaluation of other-than-temporary declines in the value of investments and our allowance for current expected credit losses. Actual amounts could differ significantly from these estimates.</p> <p style="text-align:justify;margin-top:10pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">We assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to us and the unknown future impacts of the novel coronavirus (“COVID-19”) as of December 31, 2020 and through the date of this report. The accounting matters assessed included, but were not limited to, the allowance for doubtful accounts, current estimated credit losses, stock-based compensation, excess and obsolete inventory reserves, carrying value of goodwill, intangibles and other long-lived assets, financial assets, valuation allowances for tax assets and revenue recognition. While there was not a material impact to our consolidated financial statements as of and for the year ended December 31, 2020 resulting from these assessments, future conditions related to the magnitude and duration of the COVID-19 pandemic, as well as other factors, could result in material impacts to our consolidated financial statements in future reporting periods.</p>
CY2020Q4 us-gaap Cash Uninsured Amount
CashUninsuredAmount
56300000
CY2019Q4 us-gaap Long Term Debt
LongTermDebt
24600000
CY2019Q4 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
24600000
CY2020 adtn Number Of Single Customers Accounting For More Than Ten Percent Of Accounts Receivable
NumberOfSingleCustomersAccountingForMoreThanTenPercentOfAccountsReceivable
3
CY2019 us-gaap Asset Impairment Charges
AssetImpairmentCharges
3900000
CY2018 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2019 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2020 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2018 us-gaap Impairment Of Long Lived Assets To Be Disposed Of
ImpairmentOfLongLivedAssetsToBeDisposedOf
0
CY2018 us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
-7441000
CY2018 adtn Cumulative Effect On Reclassification From Aoci To Retained Earnings Due To Changes In Accounting Standard
CumulativeEffectOnReclassificationFromAOCIToRetainedEarningsDueToChangesInAccountingStandard
-3220000
CY2020 us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
4375000
CY2020 us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
-403000
CY2020 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
1012000
CY2020 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
263000
CY2020 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
749000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
-585000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
-152000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
-433000
CY2020 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
1784000
CY2020 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
553000
CY2020 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax
1231000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
1212000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
376000
CY2020 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
836000
CY2020 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
4857000
CY2020 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
4857000
CY2020 us-gaap Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
4712000
CY2020 us-gaap Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
-66000
CY2020 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
4778000
CY2019 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
774000
CY2019 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
201000
CY2019 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
573000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
-397000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
-103000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
-294000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
771000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
239000
CY2019 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
532000
CY2019 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
-1480000
CY2019 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
-1480000
CY2019 us-gaap Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
-2820000
CY2019 us-gaap Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
-434000
CY2019 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
-2386000
CY2018 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
926000
CY2018 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
241000
CY2018 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
685000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
-804000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
-209000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
-595000
CY2018 adtn Other Comprehensive Income Loss Reclassification Adjustment From Aoci Retained Earnings Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIRetainedEarningsBeforeTax
-4351000
CY2018 adtn Other Comprehensive Income Loss Reclassification Adjustment From Aoci Retained Earnings Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIRetainedEarningsTax
-1131000
CY2018 adtn Other Comprehensive Income Loss Reclassification Adjustment From Aoci Retained Earnings Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIRetainedEarningsNetOfTax
-3220000
CY2018 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
5638000
CY2018 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
1748000
CY2018 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax
3890000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
196000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
61000
CY2018 us-gaap Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
135000
CY2018 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
-4236000
CY2018 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
-4236000
CY2018 us-gaap Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
-13907000
CY2018 us-gaap Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
-2786000
CY2018 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
-11121000
CY2020 us-gaap Standard Product Warranty Description
StandardProductWarrantyDescription
90 days to five years
CY2020Q4 us-gaap Hosting Arrangement Service Contract Implementation Cost Capitalized Before Accumulated Amortization
HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization
13515000
CY2020Q4 us-gaap Hosting Arrangement Service Contract Implementation Cost Capitalized After Accumulated Amortization
HostingArrangementServiceContractImplementationCostCapitalizedAfterAccumulatedAmortization
13515000
CY2020Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
60161000
CY2020Q4 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
18000
CY2020Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
60179000
CY2019Q4 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
0
CY2018Q4 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
0
CY2020 adtn Number Of Product Categories
NumberOfProductCategories
3
CY2020 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
506510000
CY2020 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
6834000
CY2019 us-gaap Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
12700000
CY2019 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
6962000
CY2018 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
7155000
CY2020 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
1629000
CY2019 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
1659000
CY2018 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
1432000
CY2020 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
5205000
CY2019 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
5303000
CY2018 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
5723000
CY2019Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
1891000
CY2019Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
14.58
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
1029000
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
11.02
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
453000
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
14.26
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
621000
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
18.14
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
1846000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
11.49
CY2019Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
3572000
CY2019Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
22.88
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
854000
CY2020 us-gaap Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice
28.00
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
2718000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
21.17
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
2718000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
21.17
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
0
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
0
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
100000
CY2018 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
200000
CY2019 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
900000
CY2018 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
2500000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
2718000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
2718000
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
0
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
0
CY2018 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
0
CY2020Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
44666000
CY2020Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
457000
CY2020Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
7000
CY2020Q4 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
45116000
CY2019Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
37528000
CY2019Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
153000
CY2019Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
21000
CY2019Q4 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
37660000
CY2020 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
459000
CY2019 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
108000
CY2018 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
57000
CY2020 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
58000
CY2019 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
50000
CY2018 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
592000
CY2020 us-gaap Debt Securities Available For Sale Realized Gain Loss
DebtSecuritiesAvailableForSaleRealizedGainLoss
401000
CY2019 us-gaap Debt Securities Available For Sale Realized Gain Loss
DebtSecuritiesAvailableForSaleRealizedGainLoss
58000
CY2018 us-gaap Debt Securities Available For Sale Realized Gain Loss
DebtSecuritiesAvailableForSaleRealizedGainLoss
-535000
CY2020 us-gaap Debt Securities Available For Sale Purchased With Credit Deterioration Amount At Purchase Price
DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice
0
CY2019 us-gaap Debt Securities Available For Sale Purchased With Credit Deterioration Amount At Purchase Price
DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice
0
CY2018 us-gaap Debt Securities Available For Sale Purchased With Credit Deterioration Amount At Purchase Price
DebtSecuritiesAvailableForSalePurchasedWithCreditDeteriorationAmountAtPurchasePrice
0
CY2020Q4 us-gaap Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss
DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
7000
CY2020Q4 us-gaap Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss
DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
7000
CY2019Q4 us-gaap Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months
DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
8965000
CY2019Q4 us-gaap Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss
DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
19000
CY2019Q4 us-gaap Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer
DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
136000
CY2019Q4 us-gaap Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss
DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
2000
CY2019Q4 us-gaap Debt Securities Available For Sale Unrealized Loss Position
DebtSecuritiesAvailableForSaleUnrealizedLossPosition
9101000
CY2019Q4 us-gaap Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss
DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
21000
CY2019Q1 us-gaap Transfer Of Investments
TransferOfInvestments
3400000
CY2019Q4 us-gaap Equity Securities Without Readily Determinable Fair Value Amount
EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
3400000
CY2020Q4 us-gaap Equity Securities Fv Ni
EquitySecuritiesFvNi
800000
CY2020 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
-2382000
CY2019 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
-96000
CY2018 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
1306000
CY2020 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
6831000
CY2019 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
11472000
CY2018 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-4821000
CY2020 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
4449000
CY2019 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
11376000
CY2018 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-3515000
CY2020Q4 us-gaap Inventory Raw Materials Net Of Reserves
InventoryRawMaterialsNetOfReserves
47026000
CY2019Q4 us-gaap Inventory Raw Materials Net Of Reserves
InventoryRawMaterialsNetOfReserves
36987000
CY2020Q4 us-gaap Inventory Work In Process Net Of Reserves
InventoryWorkInProcessNetOfReserves
776000
CY2019Q4 us-gaap Inventory Work In Process Net Of Reserves
InventoryWorkInProcessNetOfReserves
1085000
CY2020Q4 us-gaap Inventory Finished Goods Net Of Reserves
InventoryFinishedGoodsNetOfReserves
77655000
CY2019Q4 us-gaap Inventory Finished Goods Net Of Reserves
InventoryFinishedGoodsNetOfReserves
60233000
CY2020Q4 us-gaap Machinery And Equipment Gross
MachineryAndEquipmentGross
132920000
CY2019Q4 us-gaap Machinery And Equipment Gross
MachineryAndEquipmentGross
130430000
CY2020Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
331713000
CY2018 us-gaap Depreciation
Depreciation
12700000
CY2020Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
5309000
CY2019Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
8452000
CY2020Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
5309000
CY2019Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
8452000
CY2020Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
1806000
CY2019Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
2676000
CY2020Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
3574000
CY2019Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
5818000
CY2020Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
5380000
CY2020Q4 us-gaap Inventory Net
InventoryNet
125457000
CY2019Q4 us-gaap Inventory Net
InventoryNet
98305000
CY2020Q4 us-gaap Inventory Valuation Reserves
InventoryValuationReserves
39600000
CY2019Q4 us-gaap Inventory Valuation Reserves
InventoryValuationReserves
34100000
CY2020Q4 us-gaap Land
Land
4575000
CY2019Q4 us-gaap Land
Land
4575000
CY2020Q4 us-gaap Buildings And Improvements Gross
BuildingsAndImprovementsGross
35142000
CY2019Q4 us-gaap Buildings And Improvements Gross
BuildingsAndImprovementsGross
34797000
CY2020Q4 adtn Building
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68169000
CY2019Q4 adtn Building
Building
68157000
CY2020Q4 us-gaap Furniture And Fixtures Gross
FurnitureAndFixturesGross
19965000
CY2019Q4 us-gaap Furniture And Fixtures Gross
FurnitureAndFixturesGross
19959000
CY2020Q4 us-gaap Capitalized Computer Software Gross
CapitalizedComputerSoftwareGross
70942000
CY2019Q4 us-gaap Capitalized Computer Software Gross
CapitalizedComputerSoftwareGross
68777000
CY2019Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
326695000
CY2020Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
269314000
CY2019Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
258609000
CY2020Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
62399000
CY2019Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
68086000
CY2020 us-gaap Asset Impairment Charges
AssetImpairmentCharges
100000
CY2019 us-gaap Asset Impairment Charges
AssetImpairmentCharges
3900000
CY2018 us-gaap Asset Impairment Charges
AssetImpairmentCharges
0
CY2020 us-gaap Depreciation
Depreciation
12200000
CY2019 us-gaap Depreciation
Depreciation
12500000
CY2019Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
8494000
CY2019 us-gaap Short Term Lease Cost
ShortTermLeaseCost
400000
CY2020 us-gaap Variable Lease Cost
VariableLeaseCost
700000
CY2019 us-gaap Variable Lease Cost
VariableLeaseCost
900000
CY2019 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
11615000
CY2020Q4 us-gaap Financing Receivable Allowance For Credit Losses
FinancingReceivableAllowanceForCreditLosses
0
CY2020 us-gaap Operating Lease Expense
OperatingLeaseExpense
2545000
CY2019 us-gaap Operating Lease Expense
OperatingLeaseExpense
3881000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
1895000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
1600000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
1251000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
521000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
287000
CY2020Q4 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
5554000
CY2020Q4 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
174000
CY2020Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
5380000
CY2018Q4 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
300000
CY2020 us-gaap Operating Lease Payments
OperatingLeasePayments
2632000
CY2019 us-gaap Operating Lease Payments
OperatingLeasePayments
3439000
CY2020 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
324000
CY2019Q4 us-gaap Financing Receivable Allowance For Credit Losses
FinancingReceivableAllowanceForCreditLosses
0
CY2020Q4 adtn Sales Type Lease Lease Receivable Current
SalesTypeLeaseLeaseReceivableCurrent
702000
CY2019Q4 adtn Sales Type Lease Lease Receivable Current
SalesTypeLeaseLeaseReceivableCurrent
1201000
CY2020Q4 adtn Sales Type Lease Lease Receivable Noncurrent
SalesTypeLeaseLeaseReceivableNoncurrent
347000
CY2019Q4 adtn Sales Type Lease Lease Receivable Noncurrent
SalesTypeLeaseLeaseReceivableNoncurrent
889000
CY2020Q4 us-gaap Sales Type Lease Lease Receivable
SalesTypeLeaseLeaseReceivable
1049000
CY2019Q4 us-gaap Sales Type Lease Lease Receivable
SalesTypeLeaseLeaseReceivable
2090000
CY2020Q4 adtn Sales Type Leases Unearned Revenue Current
SalesTypeLeasesUnearnedRevenueCurrent
218000
CY2019Q4 adtn Sales Type Leases Unearned Revenue Current
SalesTypeLeasesUnearnedRevenueCurrent
365000
CY2020Q4 adtn Sales Type Leases Unearned Revenue Noncurrent
SalesTypeLeasesUnearnedRevenueNoncurrent
50000
CY2019Q4 adtn Sales Type Leases Unearned Revenue Noncurrent
SalesTypeLeasesUnearnedRevenueNoncurrent
163000
CY2020Q4 us-gaap Sales Type Lease Net Investment In Lease
SalesTypeLeaseNetInvestmentInLease
781000
CY2019Q4 us-gaap Sales Type Lease Net Investment In Lease
SalesTypeLeaseNetInvestmentInLease
1562000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Next Twelve Months
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths
703000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Two Years
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears
250000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Three Years
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears
88000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Four Years
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears
7000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Five Years
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears
1000
CY2020Q4 us-gaap Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received
SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived
1049000
CY2020 us-gaap Goodwill Acquired During Period
GoodwillAcquiredDuringPeriod
7000000.0
CY2019 us-gaap Goodwill Acquired During Period
GoodwillAcquiredDuringPeriod
7000000.0
CY2020 us-gaap Goodwill Impairment Loss
GoodwillImpairmentLoss
0
CY2019 us-gaap Goodwill Impairment Loss
GoodwillImpairmentLoss
0
CY2018 us-gaap Goodwill Impairment Loss
GoodwillImpairmentLoss
0
CY2020Q4 us-gaap Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
39293000
CY2020Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
15823000
CY2020Q4 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
23470000
CY2019Q4 us-gaap Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
42596000
CY2019Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
14775000
CY2019Q4 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
27821000
CY2020 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2019 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2018 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0
CY2020 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
4400000
CY2019 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
5300000
CY2018 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
2300000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
4119000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
3494000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
3340000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
3245000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
3031000
CY2020Q4 us-gaap Finite Lived Intangible Assets Amortization Expense After Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
6241000
CY2020Q4 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
23470000
CY2020 adtn Realized Economic Incentives
RealizedEconomicIncentives
0
CY2019 adtn Realized Economic Incentives
RealizedEconomicIncentives
1200000
CY2018 adtn Realized Economic Incentives
RealizedEconomicIncentives
1400000
CY2020 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
-10574000
CY2019 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
-518000
CY2018 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
-8001000
CY2020 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
-329000
CY2019 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
-1065000
CY2018 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
-476000
CY2020 us-gaap Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
3635000
CY2019 us-gaap Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
-282000
CY2018 us-gaap Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
11705000
CY2020 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
-7268000
CY2019 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
-1865000
CY2018 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
3228000
CY2019 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
24801000
CY2018 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
-14448000
CY2019 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
5815000
CY2018 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
-3390000
CY2020 us-gaap Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
-1356000
CY2019 us-gaap Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
-546000
CY2018 us-gaap Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
581000
CY2020 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-1356000
CY2019 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
30070000
CY2018 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-17257000
CY2020 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
-8624000
CY2019 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
28205000
CY2018 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
-14029000
CY2020 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.2100
CY2019 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.2100
CY2018 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.2100
CY2020 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.1110
CY2019 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.0697
CY2018 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.1453
CY2020 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
-0.5763
CY2019 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
-0.1553
CY2018 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
-0.1423
CY2020 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.1783
CY2019 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
0.0283
CY2018 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.1145
CY2020 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
-0.0193
CY2019 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
-0.0049
CY2018 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
-0.0045
CY2019 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
-0.0385
CY2018 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
-0.0315
CY2020 us-gaap Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance
EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
-0.4479
CY2019 us-gaap Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance
EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
1.7282
CY2020 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Foreign
EffectiveIncomeTaxRateReconciliationTaxCreditsForeign
0.1790
CY2019 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Foreign
EffectiveIncomeTaxRateReconciliationTaxCreditsForeign
0.1669
CY2020 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
-0.2336
CY2019 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
-0.0601
CY2018 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
-0.0287
CY2020 adtn Effective Income Tax Rate Reconciliation Withholding Taxes
EffectiveIncomeTaxRateReconciliationWithholdingTaxes
0.2083
CY2018 adtn Effective Income Tax Rate Reconciliation Bargain Purchase
EffectiveIncomeTaxRateReconciliationBargainPurchase
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