$ATRO
ASTRONICS CORP Stock $atro

$atro Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000000806321000007 Filed on March 01, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$114.8M	$198.4M	$177.0M
YoY Change	-42.14%	-2.22%	-16.77%
Cost Of Revenue	$95.70M	$171.5M	$140.2M
YoY Change	-44.2%	10.5%	-15.73%
Gross Profit	$19.10M	$26.91M	$36.79M
YoY Change	-29.02%	-43.56%	-20.57%
Gross Profit Margin	16.64%	13.56%	20.79%
Selling, General & Admin	$24.80M	$52.70M	$31.69M
YoY Change	-52.94%	81.1%	13.28%
% of Gross Profit	129.84%	195.85%	86.13%
Research & Development			$25.60M
YoY Change			-17.95%
% of Gross Profit			69.58%
Depreciation & Amortization	$7.750M	$8.870M	$8.200M
YoY Change	-12.63%	7.26%	0.24%
% of Gross Profit	40.58%	32.96%	22.29%
Operating Expenses	$24.80M	$52.70M	$57.29M
YoY Change	-52.94%	80.48%	-3.19%
Operating Profit	-$5.700M	-$25.79M	$5.103M
YoY Change	-77.9%	-239.63%	-72.18%
Interest Expense	-$1.700M	-$1.600M	-$1.500M
YoY Change	6.25%	-33.33%	-40.0%
% of Operating Profit			-29.39%
Other Income/Expense, Net	-$400.0K	-$4.900M	-$500.0K
YoY Change	-91.84%	716.67%	66.67%
Pretax Income	-$7.500M	-$43.28M	$1.760M
YoY Change	-82.67%	-377.56%	-88.7%
Income Tax	$12.40M	-$9.200M	$550.0K
% Of Pretax Income			31.25%
Net Earnings	-$20.00M	-$34.07M	$1.210M
YoY Change	-41.29%	-372.85%	-92.88%
Net Earnings / Revenue	-17.42%	-17.17%	0.68%
Basic Earnings Per Share		-$1.10	$0.04
Diluted Earnings Per Share	-$649.4K	-$1.10	$0.04
COMMON SHARES
Basic Shares Outstanding			31.96M shares
Diluted Shares Outstanding			32.58M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$40.40M	$31.90M	$22.80M
YoY Change	26.65%	92.17%	365.31%
Cash & Equivalents	$40.41M	$31.91M	$22.80M
Short-Term Investments
Other Short-Term Assets	$26.40M	$17.40M	$20.80M
YoY Change	51.72%	-52.46%	20.93%
Inventory	$157.1M	$145.8M	$149.6M
Prepaid Expenses
Receivables	$93.06M	$148.0M	$159.7M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$316.9M	$343.1M	$352.9M
YoY Change	-7.62%	-8.31%	-3.59%
LONG-TERM ASSETS
Property, Plant & Equipment	$106.7M	$112.5M	$113.1M
YoY Change	-5.17%	-6.92%	-9.24%
Goodwill	$58.28M	$145.0M	$133.6M
YoY Change	-59.8%	16.02%	6.76%
Intangibles	$109.9M	$127.3M	$132.4M
YoY Change	-13.67%	-4.57%	-4.27%
Long-Term Investments
YoY Change
Other Assets	$8.999M	$31.27M	$45.91M
YoY Change	-71.22%	47.01%	109.71%
Total Long-Term Assets	$302.8M	-$343.1M	$425.1M
YoY Change	-188.26%	-185.67%	3.67%
TOTAL ASSETS
Total Short-Term Assets	$316.9M	$343.1M	$352.9M
Total Long-Term Assets	$302.8M	-$343.1M	$425.1M
Total Assets	$619.7M		$778.0M
YoY Change			0.25%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.45M	$35.84M	$46.05M
YoY Change	-26.22%	-29.26%	9.16%
Accrued Expenses	$39.60M	$52.10M	$49.30M
YoY Change	-23.99%	9.68%	13.86%
Deferred Revenue	$24.57M	$31.36M	$23.53M
YoY Change	-21.65%	16.67%	-22.07%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$224.0K	$191.0K
YoY Change	-100.0%	-88.02%	-90.28%
Total Short-Term Liabilities	$93.74M	$120.6M	$119.1M
YoY Change	-22.3%	-5.82%	1.2%
LONG-TERM LIABILITIES
Long-Term Debt	$173.0M	$188.0M	$180.1M
YoY Change	-7.98%	-19.0%	-30.12%
Other Long-Term Liabilities	$30.66M	$33.01M	$53.04M
YoY Change	-7.14%	1616.64%	69.68%
Total Long-Term Liabilities	$203.7M	$221.0M	$233.1M
YoY Change	-7.85%	-5.56%	-19.33%
TOTAL LIABILITIES
Total Short-Term Liabilities	$93.74M	$120.6M	$119.1M
Total Long-Term Liabilities	$203.7M	$221.0M	$233.1M
Total Liabilities	$349.4M	$393.9M	$352.2M
YoY Change	-11.29%	1.51%	-13.39%
SHAREHOLDERS EQUITY
Retained Earnings	$312.8M	$428.6M
YoY Change	-27.01%	13.81%
Common Stock	$82.53M	$76.69M	$344.0K
YoY Change	7.63%	4.49%	0.88%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$108.5M	$100.8M
YoY Change	7.67%	101.57%
Treasury Stock Shares	3.808M shares	3.526M shares
Shareholders Equity	$270.4M	$388.9M	$425.8M
YoY Change
Total Liabilities & Shareholders Equity	$619.7M	$782.7M	$778.0M
YoY Change	-20.82%	1.04%	0.25%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	-$20.00M	-$34.07M	$1.210M
YoY Change	-41.29%	-372.85%	-92.88%
Depreciation, Depletion And Amortization	$7.750M	$8.870M	$8.200M
YoY Change	-12.63%	7.26%	0.24%
Cash From Operating Activities	$5.830M	$12.45M	$21.18M
YoY Change	-53.17%	-68.5%	192.14%
INVESTING ACTIVITIES
Capital Expenditures	-$1.880M	-$3.230M	-$1.930M
YoY Change	-41.8%	-17.18%	-50.77%
Acquisitions
YoY Change
Other Investing Activities	$60.00K	-$6.300M	-$20.78M
YoY Change	-100.95%	-21100.0%	514.79%
Cash From Investing Activities	-$1.820M	-$9.530M	-$22.72M
YoY Change	-80.9%	145.62%	211.66%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	4.900M	5.760M	7.530M
YoY Change	-14.93%	-124.2%	-232.34%
NET CHANGE
Cash From Operating Activities	5.830M	12.45M	21.18M
Cash From Investing Activities	-1.820M	-9.530M	-22.72M
Cash From Financing Activities	4.900M	5.760M	7.530M
Net Change In Cash	8.910M	8.680M	5.990M
YoY Change	2.65%	-26.69%	-204.54%
FREE CASH FLOW
Cash From Operating Activities	$5.830M	$12.45M	$21.18M
Capital Expenditures	-$1.880M	-$3.230M	-$1.930M
Free Cash Flow	$7.710M	$15.68M	$23.11M
YoY Change	-50.83%	-63.89%	106.89%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000008063
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesCurrent
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Entity File Number EntityFileNumber	0-7087
CY2020	dei	Entity Registrant Name EntityRegistrantName	Astronics Corporation
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	16-0959303
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	130 Commerce Way
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	East Aurora
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	14052
CY2020	dei	City Area Code CityAreaCode	716
CY2020	dei	Local Phone Number LocalPhoneNumber	805-1599
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $.01 par value per share
CY2020	dei	Trading Symbol TradingSymbol	ATRO
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	266000000	USD
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CY2018	us-gaap	Gross Profit GrossProfit	180696000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	110528000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	143358000	USD
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CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2680000	USD
CY2020	atro	Noncash Operating Lease Expense NoncashOperatingLeaseExpense	4500000	USD
CY2019	atro	Noncash Operating Lease Expense NoncashOperatingLeaseExpense	4208000	USD
CY2018	atro	Noncash Operating Lease Expense NoncashOperatingLeaseExpense	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	78801000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	87016000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	11083000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	0	USD
CY2019	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	-19619000	USD
CY2018	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	-1000000	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	3493000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	5000000	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2020	us-gaap	Restructuring Costs RestructuringCosts	1173000	USD
CY2019	us-gaap	Restructuring Costs RestructuringCosts	6539000	USD
CY2018	us-gaap	Restructuring Costs RestructuringCosts	0	USD
CY2020	atro	Deferred Income Tax Expense Benefit Federal Payroll Taxes DeferredIncomeTaxExpenseBenefitFederalPayrollTaxes	5877000	USD
CY2019	atro	Deferred Income Tax Expense Benefit Federal Payroll Taxes DeferredIncomeTaxExpenseBenefitFederalPayrollTaxes	0	USD
CY2018	atro	Deferred Income Tax Expense Benefit Federal Payroll Taxes DeferredIncomeTaxExpenseBenefitFederalPayrollTaxes	0	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2157000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1610000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	668000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-53928000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-34083000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	47291000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-7043000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13614000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	12711000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	14695000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	45000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1160000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-464000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-9930000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-16617000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	9171000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-17667000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-10737000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	8177000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-10440000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	3371000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-4460000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-11919000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	15735000	USD
CY2020	atro	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-4556000	USD
CY2019	atro	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-3840000	USD
CY2018	atro	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	0	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-403000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1490000	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1924000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	37335000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	42689000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	54881000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	28907000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	104877000	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	7459000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	12083000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	16317000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1662000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-743000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3350000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5797000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	64630000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-19667000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	155000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	117000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	35015000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	170228000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	156107000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	72834000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7732000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	50784000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	360000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	516000	USD
CY2020	atro	Proceeds Of Stock Options Exercised Net Of Taxes Remitted ProceedsOfStockOptionsExercisedNetOfTaxesRemitted	666000	USD
CY2019	atro	Proceeds Of Stock Options Exercised Net Of Taxes Remitted ProceedsOfStockOptionsExercisedNetOfTaxesRemitted	-545000	USD
CY2018	atro	Proceeds Of Stock Options Exercised Net Of Taxes Remitted ProceedsOfStockOptionsExercisedNetOfTaxesRemitted	2201000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1922000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1746000	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24576000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-92182000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-36134000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1544000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	147000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-372000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	8506000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	15284000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1292000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31906000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16622000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17914000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40412000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31906000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16622000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	5829000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	5707000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	9710000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1536000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	27343000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12218000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	270371000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	388857000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	386625000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020	atro	Covid19 Related Government Assistance Amount COVID19RelatedGovernmentAssistanceAmount	2700000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	86800000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	108900000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	114300000	USD
CY2020	atro	Cash And Cash Equivalents Maturity Period CashAndCashEquivalentsMaturityPeriod	P3M
CY2020	us-gaap	Depreciation Depreciation	13300000	USD
CY2019	us-gaap	Depreciation Depreciation	13700000	USD
CY2018	us-gaap	Depreciation Depreciation	15000000.0	USD
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	700000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	9500000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2018	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	3500000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	5000000.0	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
	atro	Cumulative Pretax Loss Position Period CumulativePretaxLossPositionPeriod	P3Y
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><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. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities and the reported amounts of sales and expenses during the reporting periods in the financial statements and accompanying notes. Actual results could differ from those estimates.</span></div>
CY2020	us-gaap	Dividends Cash DividendsCash	0	USD
CY2018	us-gaap	Dividends Cash DividendsCash	0	USD
CY2019	us-gaap	Dividends Cash DividendsCash	0	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	283400000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	216900000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	23500000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	19600000	USD
CY2019Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	19567000	USD
CY2019Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	38758000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	17697000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	28641000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	502587000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772702000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	803256000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	502587000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772702000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	803256000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	78577000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	131990000	USD
CY2020Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	17697000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	19567000	USD
CY2020Q4	us-gaap	Accounts Receivable Billed For Long Term Contracts Or Programs AccountsReceivableBilledForLongTermContractsOrPrograms	96274000	USD
CY2019Q4	us-gaap	Accounts Receivable Billed For Long Term Contracts Or Programs AccountsReceivableBilledForLongTermContractsOrPrograms	151557000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3218000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3559000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	93056000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	147998000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1486000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2144000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	71000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3559000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1913000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2254000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3218000	USD
CY2019Q4	atro	Inventory Valuation Reserves As Percentage Of Gross Inventory InventoryValuationReservesAsPercentageOfGrossInventory	0.187
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	26964000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	33434000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	21987000	USD
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	25594000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	108108000	USD
CY2019Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	86759000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	157059000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	145787000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	33400000	USD
CY2020Q4	atro	Inventory Valuation Reserves As Percentage Of Gross Inventory InventoryValuationReservesAsPercentageOfGrossInventory	0.175
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	33600000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	58282000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	210671000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	205180000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	103993000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	92681000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	106678000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	112499000	USD
CY2020Q1	us-gaap	Number Of Reporting Units NumberOfReportingUnits	8	reporting_unit
CY2020	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P12Y
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	215261000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	105375000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	215315000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	88022000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17100000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17600000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19400000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15336000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	14904000	USD
CY2020	atro	Number Of Reporting Units Impaired NumberOfReportingUnitsImpaired	4	reporting_unit
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	13871000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	12849000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	10929000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	124952000	USD
CY2019	atro	Goodwill Acquired Divested During Period GoodwillAcquiredDivestedDuringPeriod	21670000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1610000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-42000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	144970000	USD
CY2020	atro	Goodwill Acquired Divested During Period GoodwillAcquiredDivestedDuringPeriod	-298000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	86312000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-78000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	58282000	USD
CY2020Q4	us-gaap	Goodwill Gross GoodwillGross	178983000	USD
CY2020Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	120701000	USD
CY2020Q1	us-gaap	Number Of Reporting Units NumberOfReportingUnits	8	reporting_unit
CY2020	atro	Number Of Reporting Units Impaired NumberOfReportingUnitsImpaired	4	reporting_unit
CY2020Q4	atro	Goodwill Impairment Number Of Reporting Units Tested For Impairment GoodwillImpairmentNumberOfReportingUnitsTestedForImpairment	5	reporting_unit
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	173000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	188224000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	224000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	173000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	188000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1445000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	173000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	173000000	USD
CY2020Q2	atro	Debt Covenant Minimum Liquidity DebtCovenantMinimumLiquidity	100000000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7660000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	5027000	USD
CY2017Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	5136000	USD
CY2020	atro	Standard And Extended Product Warranty Accrual Additions From Business Acquisition And Divestiture StandardAndExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisitionAndDivestiture	0	USD
CY2019	atro	Standard And Extended Product Warranty Accrual Additions From Business Acquisition And Divestiture StandardAndExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisitionAndDivestiture	-80000	USD
CY2018	atro	Standard And Extended Product Warranty Accrual Additions From Business Acquisition And Divestiture StandardAndExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisitionAndDivestiture	0	USD
CY2020	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	1725000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	3781000	USD
CY2018	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	2806000	USD
CY2020	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-1029000	USD
CY2019	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	1451000	USD
CY2018	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-370000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	1338000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	2519000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	2545000	USD
CY2020Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7018000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7660000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	5027000	USD
CY2020Q4	atro	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	28678000	USD
CY2019Q4	atro	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	28788000	USD
CY2020Q4	atro	Operating Lease Right Of Use Asset Accumulated Impairment OperatingLeaseRightOfUseAssetAccumulatedImpairment	1710000	USD
CY2019Q4	atro	Operating Lease Right Of Use Asset Accumulated Impairment OperatingLeaseRightOfUseAssetAccumulatedImpairment	1019000	USD
CY2020Q4	atro	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	8015000	USD
CY2019Q4	atro	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	4167000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	18953000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	23602000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4998000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4517000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	16637000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	21039000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	21635000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25556000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	3484000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	3484000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2039000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	1020000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2464000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2081000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1922000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	734000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	2815000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2815000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4737000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1020000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1020000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	214000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	314000	USD
CY2020	atro	Finance Lease Cost FinanceLeaseCost	1234000	USD
CY2019	atro	Finance Lease Cost FinanceLeaseCost	1334000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	5292000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	5050000	USD
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	691000	USD
CY2019	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	1019000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	1358000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	1236000	USD
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.053
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	175000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	223000	USD
CY2020	atro	Sublease Income Expense SubleaseIncomeExpense	1437000	USD
CY2019	atro	Sublease Income Expense SubleaseIncomeExpense	630000	USD
CY2020	atro	Operating Lease Cost Net Of Sublease And Rental Income OperatingLeaseCostNetOfSubleaseAndRentalIncome	6079000	USD
CY2019	atro	Operating Lease Cost Net Of Sublease And Rental Income OperatingLeaseCostNetOfSubleaseAndRentalIncome	6898000	USD
CY2020	us-gaap	Lease Cost LeaseCost	7313000	USD
CY2019	us-gaap	Lease Cost LeaseCost	8232000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	214000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	314000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	5334000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	4718000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1922000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1746000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.033
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5635000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	2181000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5167000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	747000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3795000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2855000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2806000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3430000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	23688000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2928000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2053000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	113000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	21635000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2815000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-8679000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23798000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7540000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-4539000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4471000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-504000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1036000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2402000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1123000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-12182000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	30671000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8159000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	17044000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-16250000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1799000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-92000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	727000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1584000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1399000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1138000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	703000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15553000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-14385000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2680000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3371000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16286000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5479000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.005
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.009
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.102
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0
CY2020Q4	atro	Deferred Tax Assets Lease Accounting DeferredTaxAssetsLeaseAccounting	5545000	USD
CY2019Q4	atro	Deferred Tax Assets Lease Accounting DeferredTaxAssetsLeaseAccounting	7466000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.005
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.004
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.010
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.014
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.005
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.060
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.028
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.067
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.022
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.046
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.062
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.192
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.011
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2300000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3170000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	-0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.002
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.008
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.001
CY2020	atro	Effective Income Tax Rate Reconciliation Tax Rate Change On2020 Federal Net Operating Loss EffectiveIncomeTaxRateReconciliationTaxRateChangeOn2020FederalNetOperatingLoss	0.013
CY2019	atro	Effective Income Tax Rate Reconciliation Tax Rate Change On2020 Federal Net Operating Loss EffectiveIncomeTaxRateReconciliationTaxRateChangeOn2020FederalNetOperatingLoss	0
CY2018	atro	Effective Income Tax Rate Reconciliation Tax Rate Change On2020 Federal Net Operating Loss EffectiveIncomeTaxRateReconciliationTaxRateChangeOn2020FederalNetOperatingLoss	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.030
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.238
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.105
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	18189000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	17071000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	7564000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	6427000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	866000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	854000	USD
CY2020Q4	atro	Deferred Tax Assets Customer Advanced Payments And Deferred Revenue DeferredTaxAssetsCustomerAdvancedPaymentsAndDeferredRevenue	2216000	USD
CY2019Q4	atro	Deferred Tax Assets Customer Advanced Payments And Deferred Revenue DeferredTaxAssetsCustomerAdvancedPaymentsAndDeferredRevenue	3472000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	11244000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	8212000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	2069000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	0	USD
CY2020Q4	atro	Deferred Tax Assets Revenue Recognition DeferredTaxAssetsRevenueRecognition	2311000	USD
CY2019Q4	atro	Deferred Tax Assets Revenue Recognition DeferredTaxAssetsRevenueRecognition	2612000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	52304000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	49284000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	37168000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	13303000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	15136000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	35981000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	10166000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	10060000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	4683000	USD
CY2020Q4	atro	Deferred Tax Liabilities Revenue Recognition DeferredTaxLiabilitiesRevenueRecognition	928000	USD
CY2019Q4	atro	Deferred Tax Liabilities Revenue Recognition DeferredTaxLiabilitiesRevenueRecognition	496000	USD
CY2020Q4	atro	Deferred Tax Liabilities Lease Accounting DeferredTaxLiabilitiesLeaseAccounting	4506000	USD
CY2019Q4	atro	Deferred Tax Liabilities Lease Accounting DeferredTaxLiabilitiesLeaseAccounting	6377000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1186000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	751000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	16786000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	22367000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1650000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	13614000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1650000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	13614000	USD
CY2020	atro	Cumulative Loss Period CumulativeLossPeriod	P3Y
CY2020Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	2900000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	800000	USD
CY2020Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	500000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2565000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2197000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	atro	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	-775000	USD
CY2019	atro	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	0	USD
CY2018	atro	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	100000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	368000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2197000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1890000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2565000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2197000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1900000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2600000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2200000	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2018Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2020Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2020	atro	Pretax Income From Foreign Subsidiary PretaxIncomeFromForeignSubsidiary	-7000000.0	USD
CY2019	atro	Pretax Income From Foreign Subsidiary PretaxIncomeFromForeignSubsidiary	12200000	USD
CY2018	atro	Pretax Income From Foreign Subsidiary PretaxIncomeFromForeignSubsidiary	7300000	USD
CY2017	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	10300000	USD
CY2017	us-gaap	Tax Cuts And Jobs Act Of2017 Transition Tax For Accumulated Foreign Earnings Income Tax Expense TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsIncomeTaxExpense	1400000	USD
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	23200000	USD
CY2020	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	100000	USD
CY2019	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	-800000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	200000	USD
CY2020	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	-1500000	USD
CY2020	atro	Number Of Non Qualified Supplemental Retirement Defined Benefit Plans NumberOfNonQualifiedSupplementalRetirementDefinedBenefitPlans	2	retirement_plan
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	29400000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	25200000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	2400000	USD
CY2020Q4	atro	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditTax	600000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-9800000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	-11400000	USD
CY2020Q4	atro	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesTax	1600000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Prior Service Cost Credit Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear	300000	USD
CY2020	atro	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit Net Of Tax DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditNetOfTax	400000	USD
CY2020Q4	atro	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit Tax DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditTax	100000	USD
CY2020	atro	Defined Benefit Plan Amortization Of Net Gains Losses Before Tax DefinedBenefitPlanAmortizationOfNetGainsLossesBeforeTax	-1000000.0	USD
CY2020	atro	Defined Benefit Plan Amortization Of Net Gains Losses After Tax DefinedBenefitPlanAmortizationOfNetGainsLossesAfterTax	-1300000	USD
CY2020	atro	Defined Benefit Plan Amortization Of Net Gains Losses Net Of Tax DefinedBenefitPlanAmortizationOfNetGainsLossesNetOfTax	300000	USD
CY2020Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	10100000	shares
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-822000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2299000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1396000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-115781000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	52017000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	46803000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30795000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32028000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32351000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	431000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	431000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	785000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	785000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30795000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32459000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33136000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.76
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.62
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.76
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.60
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.41
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	800000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	500000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	200000	shares
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5184000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3843000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3098000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	709000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	452000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	179000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4475000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	3391000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2919000	USD
CY2020	atro	Number Of Reporting Units Impaired NumberOfReportingUnitsImpaired	4	reporting_unit
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	700000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	9500000	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	3500000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	5000000.0	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	114803000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	106506000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	123694000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	157584000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	198412000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	177018000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	189098000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	208174000	USD
	us-gaap	Gross Profit GrossProfit	19118000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	15173000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	26833000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	35719000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	26908000	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	78801000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	36794000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	40363000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	52077000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	12608000	USD
CY2020Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	74408000	USD
CY2019Q4	us-gaap	Asset Impairment Charges AssetImpairmentCharges	11083000	USD
CY2019Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2019Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2019Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-7541000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-11141000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-24451000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-69277000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-43282000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1760000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8830000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100995000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-19985000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-5254000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-23579000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-66963000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-34065000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1210000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	6726000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	78146000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.65
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.17
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.77
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.17
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.10
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.40
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.65
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.17
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.77
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.17
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.10
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.35
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	502587000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772702000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	803256000	USD
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6741000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6141000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-9710000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-112410000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68303000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52282000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31854000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	33049000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	35032000	USD
CY2020Q4	us-gaap	Assets Assets	619745000	USD
CY2019Q4	us-gaap	Assets Assets	782716000	USD
CY2018Q4	us-gaap	Assets Assets	774640000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	7459000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	12083000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	16317000	USD
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	700000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	502587000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	772702000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	803256000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	106678000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	112499000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-4500000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-7000000.0	USD
CY2020	atro	Number Of Major Customers NumberOfMajorCustomers	2	customer
CY2020	atro	Asset Impairment Charges And Asset Write Down AssetImpairmentChargesAndAssetWriteDown	87016000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	5327000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	92343000	USD
CY2019	atro	Asset Impairment Charges And Asset Write Down AssetImpairmentChargesAndAssetWriteDown	23646000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5190000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	28836000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	87016000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	11083000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	92343000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	28836000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	5190000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	5327000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5190000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	4886000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	5631000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	5190000	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	3500000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	5000000.0	USD

Files In Submission

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$ATRO
ASTRONICS CORP Stock $atro

2020 Q4 Form 10-K Financial Statement

#000000806321000007 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATRO ASTRONICS CORP Stock $atro

2020 Q4 Form 10-K Financial Statement

#000000806321000007 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATRO
ASTRONICS CORP Stock $atro