$ATRC
AtriCure, Inc. Stock $atrc

$atrc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000132388521000011 Filed on February 26, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$57.73M	$61.32M	$56.61M
YoY Change	-5.86%	15.93%	13.36%
Cost Of Revenue	$15.29M	$16.55M	$14.82M
YoY Change	-7.61%	15.73%	5.89%
Gross Profit	$42.44M	$44.77M	$41.80M
YoY Change	-5.22%	16.02%	16.27%
Gross Profit Margin	73.52%	73.02%	73.83%
Selling, General & Admin	$45.23M	$46.67M	$40.28M
YoY Change	-3.09%	42.55%	20.45%
% of Gross Profit	106.58%	104.23%	96.37%
Research & Development	$10.87M	$13.10M	$10.15M
YoY Change	-17.02%	54.85%	18.68%
% of Gross Profit	25.61%	29.26%	24.29%
Depreciation & Amortization	$2.170M	$2.380M	$2.390M
YoY Change	-8.82%	7.69%	11.68%
% of Gross Profit	5.11%	5.32%	5.72%
Operating Expenses	$56.10M	$59.77M	$50.43M
YoY Change	-6.14%	45.07%	20.09%
Operating Profit	-$17.50M	-$15.33M	-$8.637M
YoY Change	14.2%	487.88%	42.81%
Interest Expense	-$1.010M	-$790.0K	$1.113M
YoY Change	27.85%	19.7%	-10.67%
% of Operating Profit
Other Income/Expense, Net	$50.00K	$70.00K	-$114.0K
YoY Change	-28.57%	-187.5%	178.05%
Pretax Income	-$18.46M	-$16.05M	-$9.287M
YoY Change	15.02%	379.1%	29.27%
Income Tax	$100.0K	$50.00K	$75.00K
% Of Pretax Income
Net Earnings	-$18.56M	-$16.10M	-$9.362M
YoY Change	15.32%	369.27%	29.4%
Net Earnings / Revenue	-32.16%	-26.25%	-16.54%
Basic Earnings Per Share
Diluted Earnings Per Share	-$440.5K	-$421.5K	-$247.4K
COMMON SHARES
Basic Shares Outstanding	45.02M	39.55M	38.78M
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$244.2M	$81.80M	$79.70M
YoY Change	198.53%	-34.24%	98.26%
Cash & Equivalents	$41.94M	$28.48M	$33.18M
Short-Term Investments	$202.3M	$53.30M	$46.60M
Other Short-Term Assets	$4.300M	$3.900M	$3.500M
YoY Change	10.26%	50.0%	31.48%
Inventory	$35.03M	$29.41M	$27.79M
Prepaid Expenses
Receivables	$23.15M	$28.05M	$26.80M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$306.7M	$143.2M	$137.9M
YoY Change	114.26%	-18.04%	55.89%
LONG-TERM ASSETS
Property, Plant & Equipment	$28.29M	$32.65M	$30.79M
YoY Change	-13.34%	20.55%	10.1%
Goodwill	$234.8M	$234.8M	$236.3M
YoY Change	0.0%	123.05%	124.51%
Intangibles	$128.2M	$129.9M	$130.4M
YoY Change	-1.3%	163.7%	162.11%
Long-Term Investments	$14.20M	$12.70M	$20.40M
YoY Change	11.81%
Other Assets	$440.0K	$705.0K	$762.0K
YoY Change	-37.59%	42.42%	32.75%
Total Long-Term Assets	$407.8M	$414.7M	$422.9M
YoY Change	-1.67%	127.76%	130.42%
TOTAL ASSETS
Total Short-Term Assets	$306.7M	$143.2M	$137.9M
Total Long-Term Assets	$407.8M	$414.7M	$422.9M
Total Assets	$714.5M	$557.9M	$560.8M
YoY Change	28.08%	56.37%	106.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$12.74M	$14.95M	$13.97M
YoY Change	-14.8%	54.76%	31.92%
Accrued Expenses	$27.98M	$32.75M	$28.16M
YoY Change	-14.55%	26.74%	30.37%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$6.667M	$800.0K	$700.0K
YoY Change	733.38%
Total Short-Term Liabilities	$49.14M	$49.92M	$44.28M
YoY Change	-1.56%	24.12%	31.23%
LONG-TERM LIABILITIES
Long-Term Debt	$53.44M	$59.63M	$59.52M
YoY Change	-10.4%	67.65%	54.37%
Other Long-Term Liabilities	$187.4M	$186.4M	$184.0M
YoY Change	0.54%	859.97%	680.98%
Total Long-Term Liabilities	$240.9M	$246.1M	$243.5M
YoY Change	-2.11%	347.45%	292.05%
TOTAL LIABILITIES
Total Short-Term Liabilities	$49.14M	$49.92M	$44.28M
Total Long-Term Liabilities	$240.9M	$246.1M	$243.5M
Total Liabilities	$302.1M	$310.5M	$302.5M
YoY Change	-2.7%	189.2%	179.62%
SHAREHOLDERS EQUITY
Retained Earnings	-$330.4M	-$282.2M	-$266.1M
YoY Change	17.06%	14.25%	9.25%
Common Stock	$742.4M	$529.7M	$524.7M
YoY Change	40.16%	6.67%	28.77%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$412.4M	$247.3M	$258.2M
YoY Change
Total Liabilities & Shareholders Equity	$714.5M	$557.9M	$560.8M
YoY Change	28.08%	56.37%	106.19%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	-$18.56M	-$16.10M	-$9.362M
YoY Change	15.32%	369.27%	29.4%
Depreciation, Depletion And Amortization	$2.170M	$2.380M	$2.390M
YoY Change	-8.82%	7.69%	11.68%
Cash From Operating Activities	$3.950M	-$3.530M	-$2.590M
YoY Change	-211.9%	-456.57%	-149.71%
INVESTING ACTIVITIES
Capital Expenditures	-$1.050M	-$4.350M	-$3.370M
YoY Change	-75.86%	302.78%	103.01%
Acquisitions
YoY Change
Other Investing Activities	-$930.0K	$1.760M	-$6.260M
YoY Change	-152.84%	-102.52%	-696.19%
Cash From Investing Activities	-$1.980M	-$2.600M	-$9.640M
YoY Change	-23.85%	-96.33%	1506.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	6.450M	1.350M	20.29M
YoY Change	377.78%	-98.4%	-4818.6%
NET CHANGE
Cash From Operating Activities	3.950M	-3.530M	-2.590M
Cash From Investing Activities	-1.980M	-2.600M	-9.640M
Cash From Financing Activities	6.450M	1.350M	20.29M
Net Change In Cash	8.420M	-4.780M	8.060M
YoY Change	-276.15%	-133.43%	92.82%
FREE CASH FLOW
Cash From Operating Activities	$3.950M	-$3.530M	-$2.590M
Capital Expenditures	-$1.050M	-$4.350M	-$3.370M
Free Cash Flow	$5.000M	$820.0K	$780.0K
YoY Change	509.76%	-60.39%	-88.65%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2018	atrc	Unrecognized Tax Benefits Increases Or Decrease Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesOrDecreaseResultingFromCurrentPeriodTaxPositions
CY2019	atrc	Unrecognized Tax Benefits Increases Or Decrease Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesOrDecreaseResultingFromCurrentPeriodTaxPositions
CY2020	atrc	Unrecognized Tax Benefits Increases Or Decrease Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesOrDecreaseResultingFromCurrentPeriodTaxPositions
CY2018	atrc	Unrecognized Tax Benefits Increases Or Decreases Related To Settlements UnrecognizedTaxBenefitsIncreasesOrDecreasesRelatedToSettlements
CY2019	atrc	Unrecognized Tax Benefits Increases Or Decreases Related To Settlements UnrecognizedTaxBenefitsIncreasesOrDecreasesRelatedToSettlements
CY2020	atrc	Unrecognized Tax Benefits Increases Or Decreases Related To Settlements UnrecognizedTaxBenefitsIncreasesOrDecreasesRelatedToSettlements
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001323885
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	000-51470
CY2020	dei	Entity Registrant Name EntityRegistrantName	AtriCure, Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	34-1940305
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	7555 Innovation Way
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Mason
CY2019Q4	us-gaap	Goodwill Goodwill	234781000
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	440000
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	45040
CY2020	dei	City Area Code CityAreaCode	513
CY2020	dei	Local Phone Number LocalPhoneNumber	755-4100
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $.001 par value
CY2020	dei	Trading Symbol TradingSymbol	ATRC
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	1960600000
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CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1096000
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CY2019Q4	us-gaap	Assets Current AssetsCurrent	143160000
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CY2019Q4	us-gaap	Common Stock Value CommonStockValue	40000
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CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-233000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-21137000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	249381000
CY2019	atrc	Stock Issued During Period Value Settlement Of Contingent Consideration StockIssuedDuringPeriodValueSettlementOfContingentConsideration	20307000
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-7831000
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2662000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	17977000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	41000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-35194000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	247343000
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	188958000
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-2194000
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3330000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22642000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	470000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-48155000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	412394000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-48155000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-35194000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-21137000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	22642000
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	73249000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1943000
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1510000
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	509000
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	375000
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	515000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	16495000
CY2020	us-gaap	Depreciation Depreciation	7866000
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-277000
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-604000
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-323000
CY2019	us-gaap	Depreciation Depreciation	7423000
CY2018	us-gaap	Depreciation Depreciation	7244000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1682000
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1236000
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	922000
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	362000
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-357000
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-4916000
CY2018	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-10825000
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1070000
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1514000
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	763000
CY2018	us-gaap	Payment For Contingent Consideration Liability Operating Activities PaymentForContingentConsiderationLiabilityOperatingActivities	96000
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5087000
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3201000
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2837000
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5265000
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5151000
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	146000
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	477000
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	1199000
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	367000
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1560000
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2790000
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2398000
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-4908000
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3108000
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7016000
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-484000
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	962000
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-131000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-19869000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-15811000
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	27389000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5259000
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	106588000
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	75306000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2147000
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	100485000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-85404000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-4171000
CY2020	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	227045000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12182000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6211000
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	39000
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	6000
CY2020	atrc	Proceeds From Capital Grant ProceedsFromCapitalGrant	800000
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	17240000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-156198000
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	218000
CY2019	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0
CY2018	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	229000
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	188958000
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	82873000
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	20000000
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	17381000
CY2020	atrc	Repayments Of Debt And Finance Lease Obligation RepaymentsOfDebtAndFinanceLeaseObligation	667000
CY2019	atrc	Repayments Of Debt And Finance Lease Obligation RepaymentsOfDebtAndFinanceLeaseObligation	629000
CY2018	atrc	Repayments Of Debt And Finance Lease Obligation RepaymentsOfDebtAndFinanceLeaseObligation	1755000
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	35000
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	329000
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1136000
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	10835000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1202000
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6012000
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	13029000
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	9033000
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4457000
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	3330000
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	2662000
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	2383000
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	1125000
CY2019	atrc	Proceeds From Economic Incentive Loan ProceedsFromEconomicIncentiveLoan	500000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	189392000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	14373000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	100176000
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	136000
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-163000
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-179000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	13461000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	18000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	10422000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28483000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32231000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	21809000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	41944000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28483000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32231000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	4366000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	3719000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	3870000
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	217000
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	259000
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	65000
CY2019	atrc	Business Acquisition Contingent Consideration BusinessAcquisitionContingentConsideration	171300000
CY2019	us-gaap	Stock Issued1 StockIssued1	20307000
CY2018	atrc	Share Settled Portion Of Contingent Consideration ShareSettledPortionOfContingentConsideration	6279000
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	298000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1053000
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	348000
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	22000
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	270000
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	24000
CY2018	atrc	Capital Lease Asset Early Termination CapitalLeaseAssetEarlyTermination	6000
CY2020	us-gaap	Nature Of Operations NatureOfOperations	<span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: italic;font-weight: bold;margin: 0;padding: 0;">Nature of the Business</span><span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: normal;font-weight: normal;margin: 0;padding: 0;">—The “Company” or “AtriCure” consists of AtriCure, Inc. and its wholly-owned subsidiaries. The Company is </span><span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: normal;font-weight: normal;margin: 0;padding: 0;">a </span><span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: normal;font-weight: normal;margin: 0;padding: 0;">leading innovator in treatments for atrial fibrillation (Afib) and left atrial appendage (LAA) management and sells its products to medical centers globally through its direct sales force and distributors.</span>
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-199000
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	34000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	155000
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2301000
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3623000
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3869000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-158000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-199000
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	312000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-158000
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	655000
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	635000
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	785000
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: italic;font-weight: bold;margin: 0;padding: 0;">Use of Estimates—</span><span style="white-space:pre-wrap; font-family: 'Times New Roman', 'serif';font-size: 10pt;font-style: normal;font-weight: normal;margin: 0;padding: 0;">The preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates.</span>
CY2019Q4	atrc	Change In Levels Or Methodology Of Measurement Of Financial Assets And Liabilities ChangeInLevelsOrMethodologyOfMeasurementOfFinancialAssetsAndLiabilities	0
CY2020Q4	atrc	Change In Levels Or Methodology Of Measurement Of Financial Assets And Liabilities ChangeInLevelsOrMethodologyOfMeasurementOfFinancialAssetsAndLiabilities	0
CY2020Q4	us-gaap	Investment Owned At Cost InvestmentOwnedAtCost	216398000
CY2020	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	54000
CY2020Q4	us-gaap	Investment Owned At Fair Value InvestmentOwnedAtFairValue	216452000
CY2019Q4	us-gaap	Investment Owned At Cost InvestmentOwnedAtCost	65893000
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	100000
CY2019Q4	us-gaap	Investment Owned At Fair Value InvestmentOwnedAtFairValue	65993000
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	0
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	0
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	0
CY2020Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	260000000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1878000
CY2020	us-gaap	Depreciation Depreciation	7866000
CY2019	us-gaap	Depreciation Depreciation	7423000
CY2020Q4	us-gaap	Goodwill Goodwill	234781000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	138012000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9813000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	138012000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8131000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1682000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1943000
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1510000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	951000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	718000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	18000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	18000
CY2018Q4	us-gaap	Goodwill Goodwill	105257000
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	129524000
CY2019Q4	us-gaap	Goodwill Goodwill	234781000
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	11966000
CY2019Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	11126000
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	2424000
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1260000
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	20636000
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	17028000
CY2020Q4	us-gaap	Inventory Net InventoryNet	35026000
CY2019Q4	us-gaap	Inventory Net InventoryNet	29414000
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	65133000
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	65708000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	36843000
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33062000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28290000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32646000
CY2018	us-gaap	Depreciation Depreciation	7244000
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	8576000
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	6748000
CY2020Q4	atrc	Accrued Settlement Current AccruedSettlementCurrent	6000000
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	4765000
CY2019Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	8734000
CY2020Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	4389000
CY2019Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	10840000
CY2020Q4	atrc	Sales Returns Allowance Trade SalesReturnsAllowanceTrade	1889000
CY2019Q4	atrc	Sales Returns Allowance Trade SalesReturnsAllowanceTrade	3979000
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	1256000
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	1658000
CY2020Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	703000
CY2019Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	732000
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	406000
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	59000
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	27984000
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	32750000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	6667000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	20000000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	20000000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	13333000
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	6667000
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	53333000
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	60000000
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0594
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0568
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P9Y8M12D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0691
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0705
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1237000
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	952000
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1050000
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	998000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	844000
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	872000
CY2020	us-gaap	Lease Cost LeaseCost	1894000
CY2019	us-gaap	Lease Cost LeaseCost	1870000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1236000
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	1026000
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	844000
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	872000
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	664000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	629000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1421000
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1884000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	22000
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	270000
CY2019Q4	atrc	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Operating Lease Right Of Use Asset BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset	2929000
CY2020	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	2743000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1914000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4032000
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1180000
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	2796000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2107000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	4261000
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	14659000
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	14733000
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	5247000
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	4197000
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	9412000
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	10536000
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	823000
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	753000
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	10969000
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	11774000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	11792000
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	12527000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	927000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1608000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	637000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1629000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	239000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1652000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	246000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1674000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	253000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1625000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	8172000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2302000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	16360000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	195000
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	4568000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2107000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	11792000
CY2020	us-gaap	Royalty Expense RoyaltyExpense	2596000
CY2019	us-gaap	Royalty Expense RoyaltyExpense	2892000
CY2018	us-gaap	Royalty Expense RoyaltyExpense	2715000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-26000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-26000
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-51000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	78000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	34000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	28000
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	74000
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	165000
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	198000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	126000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	173000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	175000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-10304000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7655000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3048000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1686000
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1368000
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	178000
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3071000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1690000
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	45000
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-15049000
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-10739000
CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-2876000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-12000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	26000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	51000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	114000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	199000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	226000
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	123556000
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	111000000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	9365000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	8193000
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1598000
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	909000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	8623000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	8233000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3739000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3513000
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1360000
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1007000
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	30773000
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	30996000
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1315000
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1482000
CY2020Q4	atrc	Deferred Tax Assets Finance And Operating Lease Liabilities DeferredTaxAssetsFinanceAndOperatingLeaseLiabilities	3164000
CY2019Q4	atrc	Deferred Tax Assets Finance And Operating Lease Liabilities DeferredTaxAssetsFinanceAndOperatingLeaseLiabilities	4016000
CY2020Q4	atrc	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	2547000
CY2019Q4	atrc	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	3476000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	293000
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	287000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	117063000
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	101204000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	117025000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	101178000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	38000
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	26000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-10088000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-6950000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-4391000
CY2020	atrc	Effective Income Tax Rate Reconciliation Federal And Foreign Income Tax Rate Differential Percent EffectiveIncomeTaxRateReconciliationFederalAndForeignIncomeTaxRateDifferentialPercent	0.0297
CY2020	atrc	Effective Income Tax Rate Reconciliation Federal Foreign Income Tax Rate Differential Amount EffectiveIncomeTaxRateReconciliationFederalForeignIncomeTaxRateDifferentialAmount	-1425000
CY2019	atrc	Effective Income Tax Rate Reconciliation Federal And Foreign Income Tax Rate Differential Percent EffectiveIncomeTaxRateReconciliationFederalAndForeignIncomeTaxRateDifferentialPercent	0.0140
CY2019	atrc	Effective Income Tax Rate Reconciliation Federal Foreign Income Tax Rate Differential Amount EffectiveIncomeTaxRateReconciliationFederalForeignIncomeTaxRateDifferentialAmount	-462000
CY2018	atrc	Effective Income Tax Rate Reconciliation Federal And Foreign Income Tax Rate Differential Percent EffectiveIncomeTaxRateReconciliationFederalAndForeignIncomeTaxRateDifferentialPercent	-0.0684
CY2018	atrc	Effective Income Tax Rate Reconciliation Federal Foreign Income Tax Rate Differential Amount EffectiveIncomeTaxRateReconciliationFederalForeignIncomeTaxRateDifferentialAmount	1430000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0205
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	985000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0253
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	837000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0439
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	918000
CY2020	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Percent EffectiveIncomeTaxRateReconciliationDeferredAdjustmentPercent	0.0277
CY2020	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Amount EffectiveIncomeTaxRateReconciliationDeferredAdjustmentAmount	-1328000
CY2019	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Percent EffectiveIncomeTaxRateReconciliationDeferredAdjustmentPercent	0.0328
CY2019	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Amount EffectiveIncomeTaxRateReconciliationDeferredAdjustmentAmount	-1085000
CY2018	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Percent EffectiveIncomeTaxRateReconciliationDeferredAdjustmentPercent	-0.1077
CY2018	atrc	Effective Income Tax Rate Reconciliation Deferred Adjustment Amount EffectiveIncomeTaxRateReconciliationDeferredAdjustmentAmount	2253000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.3133
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	15048000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.3245
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	10739000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.1375
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2876000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0335
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1607000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0402
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1334000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.0099
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	206000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Foreign EffectiveIncomeTaxRateReconciliationTaxContingenciesForeign	0.0092
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	-441000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Foreign EffectiveIncomeTaxRateReconciliationTaxContingenciesForeign	-0.0117
CY2019	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	388000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Foreign EffectiveIncomeTaxRateReconciliationTaxContingenciesForeign	-0.0122
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	256000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0057
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-274000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0038
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	126000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0060
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	125000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0253
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1214000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0117
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-386000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0770
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1611000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.0023
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	114000
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.0060
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	199000
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.0108
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	226000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-43218000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-4823000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-28002000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-6993000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-13443000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-7468000
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	235000
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1777000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1157000
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1157000
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	21000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	620000
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1798000
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1777000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1157000
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0
CY2020Q4	atrc	Unrecognized Tax Benefits That Would Result In Adjustment To Other Tax Accounts UnrecognizedTaxBenefitsThatWouldResultInAdjustmentToOtherTaxAccounts	1798000
CY2019Q4	atrc	Unrecognized Tax Benefits That Would Result In Adjustment To Other Tax Accounts UnrecognizedTaxBenefitsThatWouldResultInAdjustmentToOtherTaxAccounts	1777000
CY2020	atrc	Concentration Risk Number Of Major Customers ConcentrationRiskNumberOfMajorCustomers	10
CY2020Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	41694000
CY2018	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
CY2019	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2020	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2020	atrc	Defined Contribution Plan Employer Matching Contribution DefinedContributionPlanEmployerMatchingContribution	2237000
CY2019	atrc	Defined Contribution Plan Employer Matching Contribution DefinedContributionPlanEmployerMatchingContribution	1915000
CY2018	atrc	Defined Contribution Plan Employer Matching Contribution DefinedContributionPlanEmployerMatchingContribution	1560000
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	244000
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	248000
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	243000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	4162000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	569000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	29594000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1985000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5343000
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	10835000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1202000
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6012000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22642000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17977000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16495000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22642000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17977000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16495000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	206531000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	230807000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	201630000
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	53225000
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	53966000
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	40824000
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	58906000
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	54757000
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	56614000
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	57725000
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	61321000
CY2020Q1	us-gaap	Gross Profit GrossProfit	38884000
CY2019Q1	us-gaap	Gross Profit GrossProfit	39871000
CY2020Q2	us-gaap	Gross Profit GrossProfit	27654000
CY2019Q2	us-gaap	Gross Profit GrossProfit	43893000
CY2020Q3	us-gaap	Gross Profit GrossProfit	40334000
CY2019Q3	us-gaap	Gross Profit GrossProfit	41797000
CY2020Q4	us-gaap	Gross Profit GrossProfit	42437000
CY2019Q4	us-gaap	Gross Profit GrossProfit	44774000
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-15454000
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-5320000
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-7285000
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-3839000
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-3991000
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-8637000
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-17503000
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-15326000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-16408000
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-5635000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-8236000
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-4101000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-4949000
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-9362000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	-18562000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-16096000
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.42
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.15
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.20
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.11
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.11
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.25
CY2020Q4	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.42
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.42

Files In Submission

Name	View Source	Status
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0001323885-21-000011-index.html	Edgar Link	pending
0001323885-21-000011.txt	Edgar Link	pending
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$ATRC
AtriCure, Inc. Stock $atrc

2020 Q4 Form 10-K Financial Statement

#000132388521000011 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATRC AtriCure, Inc. Stock $atrc

2020 Q4 Form 10-K Financial Statement

#000132388521000011 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATRC
AtriCure, Inc. Stock $atrc