$AMBA
AMBARELLA INC Stock $amba

$amba Overview Financials Valuation SEC Filings Company Website

2020 Form 10-K Financial Statement

#000156459020013513 Filed on March 27, 2020

Income Statement

Concept	2020	2019 Q1	2019
Revenue	$228.7M	$51.10M	$227.8M
YoY Change	0.42%	-27.62%	-22.9%
Cost Of Revenue	$96.02M	$20.40M	$89.62M
YoY Change	7.14%	-19.05%	-16.76%
Gross Profit	$132.7M	$30.70M	$138.1M
YoY Change	-3.93%	-32.38%	-26.41%
Gross Profit Margin	58.02%	60.08%	60.65%
Selling, General & Admin	$52.63M	$12.40M	$50.50M
YoY Change	4.23%	0.0%	5.65%
% of Gross Profit	39.66%	40.39%	36.56%
Research & Development	$129.7M	$32.60M	$128.1M
YoY Change	1.27%	3.16%	10.91%
% of Gross Profit	97.75%	106.19%	92.73%
Depreciation & Amortization	$2.800M	$1.900M	$2.600M
YoY Change	7.69%	26.67%	44.44%
% of Gross Profit	2.11%	6.19%	1.88%
Operating Expenses	$182.4M	$45.00M	$178.6M
YoY Change	2.12%	2.27%	9.35%
Operating Profit	-$49.65M	-$14.30M	-$40.42M
YoY Change	22.83%	-1121.43%	-265.45%
Interest Expense	$3.400M		$2.700M
YoY Change	25.93%
% of Operating Profit
Other Income/Expense, Net	$8.021M	$3.400M	$5.868M
YoY Change	36.69%	466.67%	352.08%
Pretax Income	-$41.63M	-$11.00M	-$34.55M
YoY Change	20.48%	-650.0%	-234.29%
Income Tax	$3.164M	-$6.500M	-$4.105M
% Of Pretax Income
Net Earnings	-$44.79M	-$4.500M	-$30.45M
YoY Change	47.11%	-446.15%	-261.51%
Net Earnings / Revenue	-19.58%	-8.81%	-13.37%
Basic Earnings Per Share	-$1.35		-$0.93
Diluted Earnings Per Share	-$1.35	-$140.2K	-$0.93
COMMON SHARES
Basic Shares Outstanding	33.08M	32.72M	32.71M
Diluted Shares Outstanding	33.08M		32.71M

Balance Sheet

Concept	2020	2019 Q1	2019
SHORT-TERM ASSETS
Cash & Short-Term Investments	$404.7M	$358.9M	$358.9M
YoY Change	12.76%	-17.41%	-17.42%
Cash & Equivalents	$231.4M	$194.0M	$194.0M
Short-Term Investments	$173.3M	$164.9M	$164.9M
Other Short-Term Assets	$5.000M	$6.200M	$6.200M
YoY Change	-19.35%	55.0%	55.0%
Inventory	$23.00M	$18.25M	$18.30M
Prepaid Expenses
Receivables	$18.50M	$26.21M	$26.20M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$451.2M	$409.6M	$409.6M
YoY Change	10.16%	-16.97%	-16.97%
LONG-TERM ASSETS
Property, Plant & Equipment	$15.50M	$5.614M	$6.700M
YoY Change	131.34%	-12.95%	4.69%
Goodwill		$26.60M
YoY Change		0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$16.10M	$2.412M	$13.00M
YoY Change	23.85%	6.87%	120.34%
Total Long-Term Assets	$76.10M	$57.26M	$57.30M
YoY Change	32.81%	7.3%	7.5%
TOTAL ASSETS
Total Short-Term Assets	$451.2M	$409.6M	$409.6M
Total Long-Term Assets	$76.10M	$57.26M	$57.30M
Total Assets	$527.3M	$466.9M	$466.9M
YoY Change	12.94%	-14.6%	-14.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$14.90M	$12.80M	$12.80M
YoY Change	16.41%	-35.4%	-35.35%
Accrued Expenses	$37.20M	$24.70M	$24.70M
YoY Change	50.61%	-23.29%	-23.29%
Deferred Revenue		$529.0K
YoY Change		72.31%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$53.50M	$39.02M	$39.00M
YoY Change	37.18%	-26.65%	-26.69%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$24.50M	$8.341M	$7.000M
YoY Change	250.0%	-25.7%	-29.29%
Total Long-Term Liabilities	$24.50M	$8.341M	$7.000M
YoY Change	250.0%	-25.7%	-29.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.50M	$39.02M	$39.00M
Total Long-Term Liabilities	$24.50M	$8.341M	$7.000M
Total Liabilities	$79.20M	$47.36M	$47.40M
YoY Change	67.09%	-26.52%	-26.51%
SHAREHOLDERS EQUITY
Retained Earnings		$230.9M
YoY Change		-11.64%
Common Stock		$188.5M
YoY Change		1256773.33%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$448.1M	$419.5M	$419.5M
YoY Change
Total Liabilities & Shareholders Equity	$527.3M	$466.9M	$466.9M
YoY Change	12.94%	-14.6%	-14.58%

Cashflow Statement

Concept	2020	2019 Q1	2019
OPERATING ACTIVITIES
Net Income	-$44.79M	-$4.500M	-$30.45M
YoY Change	47.11%	-446.15%	-261.51%
Depreciation, Depletion And Amortization	$2.800M	$1.900M	$2.600M
YoY Change	7.69%	26.67%	44.44%
Cash From Operating Activities	$39.41M	$14.00M	$24.47M
YoY Change	61.06%	-44.22%	-71.35%
INVESTING ACTIVITIES
Capital Expenditures	$1.821M	-$500.0K	$2.940M
YoY Change	-38.06%	-61.54%	-20.26%
Acquisitions	$0.00
YoY Change
Other Investing Activities	-$6.800M	-$27.90M	-$76.20M
YoY Change	-91.08%	-669.39%	1191.53%
Cash From Investing Activities	-$8.576M	-$28.40M	-$79.14M
YoY Change	-89.16%	-888.89%	724.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00		$99.90M
YoY Change	-100.0%		82.35%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	6.516M	-3.800M	-97.95M
YoY Change	-106.65%	26.67%	88.36%
NET CHANGE
Cash From Operating Activities	39.41M	14.00M	24.47M
Cash From Investing Activities	-8.576M	-28.40M	-79.14M
Cash From Financing Activities	6.516M	-3.800M	-97.95M
Net Change In Cash	37.35M	-18.20M	-152.6M
YoY Change	-124.47%	-170.82%	-741.25%
FREE CASH FLOW
Cash From Operating Activities	$39.41M	$14.00M	$24.47M
Capital Expenditures	$1.821M	-$500.0K	$2.940M
Free Cash Flow	$37.59M	$14.50M	$21.53M
YoY Change	74.59%	-45.08%	-73.65%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2020	dei	Entity File Number EntityFileNumber	001-35667
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	E9
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0459628
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3101 Jay Street
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Santa Clara
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95054
CY2020	dei	City Area Code CityAreaCode	408
CY2020	dei	Local Phone Number LocalPhoneNumber	734-8888
CY2020	dei	Security12b Title Security12bTitle	Ordinary Shares, $0.00045 Par Value Per Share
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CY2020	us-gaap	Operating Expenses OperatingExpenses	182358000
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-49649000
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	8021000
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1298000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-41628000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3164000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-44792000
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.35
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.35
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33083562
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33083562
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-44792000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	671000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	671000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-44121000
CY2017Q1	us-gaap	Stockholders Equity StockholdersEquity	454634000
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2191000
CY2018	amba	Stock Issued During Period Value Restricted Stock Units StockIssuedDuringPeriodValueRestrictedStockUnits	0
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4646000
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	54788000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	56861000
CY2020Q1	us-gaap	Assets Assets	527276000
CY2020Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	14910000
CY2020Q1	amba	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	34970000
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2181000
CY2020Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	691000
CY2020Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	701000
CY2019Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	529000
CY2020Q1	us-gaap	Liabilities Current LiabilitiesCurrent	53453000
CY2019Q1	us-gaap	Liabilities Current LiabilitiesCurrent	39023000
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	7975000
CY2017Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1703524
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	132250
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	175187
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	27721
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	21522
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1611344
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	0
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	482187000
CY2019	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	43000
CY2019	amba	Stock Issued During Period Value Restricted Stock Units StockIssuedDuringPeriodValueRestrictedStockUnits	0
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	99903000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	60812000
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	376000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-30447000
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	419489000
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5695000
CY2020	amba	Stock Issued During Period Value Restricted Stock Units StockIssuedDuringPeriodValueRestrictedStockUnits	0
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	5967000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	61042000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	671000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-44792000
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	448072000
CY2020	us-gaap	Profit Loss ProfitLoss	-44792000
CY2019	us-gaap	Profit Loss ProfitLoss	-30447000
CY2018	us-gaap	Profit Loss ProfitLoss	18852000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	11631000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7221000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	4770000
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	969000
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	670000
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-172000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	66871000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	60812000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	56861000
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	187000
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-6945000
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	2092000
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	71000
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-350000
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-165000
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7725000
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5082000
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7302000
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4719000
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-5131000
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3238000
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1057000
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2202000
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-379000
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	3298000
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	155000
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2109000
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5079000
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-8302000
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1430000
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	57000
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	368000
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	172000
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	265000
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-7026000
CY2020	amba	Proceeds From Issuance Of Shares Under Incentive Equity Plan And Employee Stock Purchase Plan ProceedsFromIssuanceOfSharesUnderIncentiveEquityPlanAndEmployeeStockPurchasePlan	11960000
CY2019	amba	Proceeds From Issuance Of Shares Under Incentive Equity Plan And Employee Stock Purchase Plan ProceedsFromIssuanceOfSharesUnderIncentiveEquityPlanAndEmployeeStockPurchasePlan	6686000
CY2018	amba	Proceeds From Issuance Of Shares Under Incentive Equity Plan And Employee Stock Purchase Plan ProceedsFromIssuanceOfSharesUnderIncentiveEquityPlanAndEmployeeStockPurchasePlan	7091000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2020	amba	Increase Decrease In Lease Liabilities IncreaseDecreaseInLeaseLiabilities	-2851000
CY2019	amba	Increase Decrease In Lease Liabilities IncreaseDecreaseInLeaseLiabilities	0
CY2018	amba	Increase Decrease In Lease Liabilities IncreaseDecreaseInLeaseLiabilities	0
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	1585000
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	1289000
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	3450000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39414000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	24472000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	85404000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1821000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2940000
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="margin-bottom:0pt;margin-top:18pt;text-indent:4.54%;font-weight:bold;font-style:italic;font-family:Times New Roman;font-size:10pt;text-transform:none;font-variant: normal;">Use of Estimates </p> <p style="margin-top:6pt;margin-bottom:0pt;text-indent:4.54%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reported periods. Actual results could differ from those estimates.</p> <p style="margin-top:12pt;margin-bottom:0pt;text-indent:4.54%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">On an ongoing basis, management evaluates its estimates and assumptions, including those related to (i) the collectability of accounts receivable; (ii) write down of excess and obsolete inventories; (iii) intangible assets and goodwill; (iv) the estimated useful lives of long-lived assets; (v) impairment of long-lived assets and financial instruments; (vi) warranty obligations; (vii) the valuation of stock-based compensation awards and financial instruments; (viii) the probability of performance objectives achievement; (ix) the realization of tax assets and estimates of tax liabilities, including reserves for uncertain tax positions; and (x) the recognition and disclosure of contingent liabilities. These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of financial instruments, assets and stock awards associated with various contractual arrangements. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material. </p>
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	231403000
CY2019Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	194047000
CY2018Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	346672000
CY2020Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	9000
CY2019Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	11000
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	231412000
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	194058000
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0
CY2018	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	0
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	0
CY2020Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Current LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueCurrent	4388000
CY2020Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2769000
CY2020Q1	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	0
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2020Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	16874000
CY2019Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	10645000
CY2020Q1	amba	Accrued Rebates AccruedRebates	54000
CY2020Q1	amba	Accrued Development Cost Liabilities AccruedDevelopmentCostLiabilities	10885000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32713606
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.35
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.93
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.57
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.35
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.93
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	770000
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2000
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	211081000
CY2019Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	205009000
CY2019Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	176000
CY2019Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	79000
CY2019Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205106000
CY2020Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	210313000
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	211081000
CY2019Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205106000
CY2020Q1	amba	Available For Sale Securities Debt Maturities Within One Year AvailableForSaleSecuritiesDebtMaturitiesWithinOneYear	146267000
CY2019Q1	amba	Available For Sale Securities Debt Maturities Within One Year AvailableForSaleSecuritiesDebtMaturitiesWithinOneYear	151991000
CY2020Q1	amba	Available For Sale Securities Debt Maturities Within One To Three Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneToThreeYearsFairValue	64814000
CY2019Q1	amba	Available For Sale Securities Debt Maturities Within One To Three Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneToThreeYearsFairValue	53115000
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	211081000
CY2019Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205106000
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	211081000
CY2019Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205106000
CY2019Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	18548000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-41628000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-34552000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25729000
CY2020Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	10133000
CY2019Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	9430000
CY2020Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	12838000
CY2019Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	8822000
CY2020Q1	us-gaap	Inventory Net InventoryNet	22971000
CY2019Q1	us-gaap	Inventory Net InventoryNet	18252000
CY2020	us-gaap	Depreciation Depreciation	2800000
CY2019	us-gaap	Depreciation Depreciation	2600000
CY2018	us-gaap	Depreciation Depreciation	1800000
CY2020Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	19987000
CY2019Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	18387000
CY2020Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	14373000
CY2019Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11659000
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5614000
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6728000
CY2020Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Current LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueCurrent	4400000
CY2020Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Noncurrent LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueNoncurrent	8200000
CY2020Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	31303000
CY2020Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	13477000
CY2020Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17826000
CY2019Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	7612000
CY2019Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	10936000
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2019Q1	amba	Accrued Rebates AccruedRebates	311000
CY2019Q1	amba	Accrued Development Cost Liabilities AccruedDevelopmentCostLiabilities	6393000
CY2019Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Current LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueCurrent	4879000
CY2019Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2472000
CY2020Q1	amba	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	34970000
CY2019Q1	amba	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	24700000
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	3000000.0
CY2019	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	4600000
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5300000
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0
CY2019Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	6206000
CY2019Q1	amba	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	24700000
CY2019Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	0
CY2019Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	2851000
CY2020	amba	Lease Liabilities Arising From Obtaining Right Of Use Assets For Operating Leases LeaseLiabilitiesArisingFromObtainingRightOfUseAssetsForOperatingLeases	299000
CY2020	amba	Leased Assets Obtained In Exchange For Operating Lease Liabilities Arising From Lease Modifications LeasedAssetsObtainedInExchangeForOperatingLeaseLiabilitiesArisingFromLeaseModifications	4021000
CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y7D
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0443
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2522000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2371000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1645000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1694000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1740000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1210000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	11182000
CY2020Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1026000
CY2020Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	10156000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2592000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1040000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	356000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	143000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	147000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	576000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	4854000
CY2019Q1	amba	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	6732000
CY2020Q1	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	1288000
CY2020Q1	amba	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	8261000
CY2019Q1	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	1293000
CY2020Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Noncurrent LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueNoncurrent	8159000
CY2019Q1	amba	Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Noncurrent LiabilitiesAssociatedWithNoncancelableInternalUseSoftwareLicenseAtNetPresentValueNoncurrent	310000
CY2020Q1	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	68000
CY2019Q1	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	6000
CY2020Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	17776000
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	8341000
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2019Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2020Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.00045
CY2019Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.00045
CY2020Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2019Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2016Q2	amba	Stock Repurchase Program Inception Month And Year StockRepurchaseProgramInceptionMonthAndYear	2016-06
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	275000000.0
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	3985876
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	30.24
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	174800000
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2020Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	50000000.0
CY2020	us-gaap	Stock Repurchase Program Expiration Date StockRepurchaseProgramExpirationDate	2020-06-30
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	66871000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	60812000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	56861000
CY2020Q1	amba	Accrued Share Based Compensation Expense AccruedShareBasedCompensationExpense	5800000
CY2017Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	21.66
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	54.66
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	28.28
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.50
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	7446000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	56.97
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	36.31
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	24.56
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	116600
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	42.73
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	21.75
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	232205
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	5.54
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	8867000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	20974
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	53.50
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	15701
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	54.35
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1459064
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	28.31
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	66850
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	50.56
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	25.35
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	366886
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.52
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13263000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	14931
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	46.29
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	19451
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	64.53
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1124646
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	32.93
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	31295000
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	29573000
CY2020Q1	amba	Closing Market Price Of Stock On Nasdaq On Last Day Of Reporting Period ClosingMarketPriceOfStockOnNASDAQOnLastDayOfReportingPeriod	59.14
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42700000
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	960567
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-44792000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-30447000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	18852000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33083562
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32713606
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33224803
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	961797
CY2020	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0
CY2019	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0
CY2018	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	390145
CY2020	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	0
CY2019	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	0
CY2018	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	6405
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33083562
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34583150
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2061477
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2740341
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1203621
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	845000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1381000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2683000
CY2020	amba	Income Loss From Continuing Operations Before Income Taxes From Non Us Entities IncomeLossFromContinuingOperationsBeforeIncomeTaxesFromNonUSEntities	-42473000
CY2019	amba	Income Loss From Continuing Operations Before Income Taxes From Non Us Entities IncomeLossFromContinuingOperationsBeforeIncomeTaxesFromNonUSEntities	-35933000
CY2018	amba	Income Loss From Continuing Operations Before Income Taxes From Non Us Entities IncomeLossFromContinuingOperationsBeforeIncomeTaxesFromNonUSEntities	23046000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1440000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1290000
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3321000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4000
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1540000
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1561000
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1435000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2983000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2853000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4760000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	182000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7077000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2185000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	119000
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-68000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	181000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6958000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2117000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3164000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4105000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6877000
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	0.338
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-8742000
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-7256000
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8699000
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2000
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2000
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	10458000
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	9226000
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-6424000
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	4172000
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	4715000
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	4645000
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	3109000
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2770000
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2408000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-7990000
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1000
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	2252000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	382000
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-32000
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	112000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3164000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4105000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6877000
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	21275000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	19426000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	593000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	575000
CY2020Q1	amba	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	2023000
CY2019Q1	amba	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	0
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3203000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3202000
CY2020Q1	amba	Foreign Deferred Tax Assets ForeignDeferredTaxAssets	132000
CY2019Q1	amba	Foreign Deferred Tax Assets ForeignDeferredTaxAssets	122000
CY2020Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	27226000
CY2019Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	23325000
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	14670000
CY2019Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12526000
CY2020Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	12556000
CY2019Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	10799000
CY2020Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1469000
CY2019Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1505000
CY2020Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1974000
CY2019Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	0
CY2020Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9113000
CY2019Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9294000
CY2020Q1	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	11900000
CY2020Q1	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	78500000
CY2020Q1	amba	Deferred Tax Assets Gross Net Of Deferred Tax Liabilities DeferredTaxAssetsGrossNetOfDeferredTaxLiabilities	23800000
CY2019Q1	amba	Deferred Tax Assets Gross Net Of Deferred Tax Liabilities DeferredTaxAssetsGrossNetOfDeferredTaxLiabilities	21800000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	14700000
CY2020Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	36200000
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37531000
CY2018Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34117000
CY2017Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37977000
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4964000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3922000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7892000
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	252000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	109000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	28000
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	552000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	11313000
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	52000
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	65000
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	467000
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42695000
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37531000
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	358000
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	263000
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	37000
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	760000
CY2019Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	403000
CY2020Q1	amba	Income Taxes Payable Including Interest And Penalties Noncurrent IncomeTaxesPayableIncludingInterestAndPenaltiesNoncurrent	8300000
CY2020Q1	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	35900000
CY2019Q1	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	28200000
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	228732000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	227768000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	295402000
CY2020Q1	amba	Minimum Percentage Of Voting Stock Used To Define Related Party MinimumPercentageOfVotingStockUsedToDefineRelatedParty	0.10

Files In Submission

Name	View Source	Status
0001564590-20-013513-index-headers.html	Edgar Link	pending
0001564590-20-013513-index.html	Edgar Link	pending
0001564590-20-013513.txt	Edgar Link	pending
0001564590-20-013513-xbrl.zip	Edgar Link	pending
amba-10k_20200131.htm	Edgar Link	pending
amba-10k_20200131_htm.xml	Edgar Link	completed
amba-20200131.xsd	Edgar Link	pending
amba-20200131_cal.xml	Edgar Link	unprocessable
amba-20200131_def.xml	Edgar Link	unprocessable
amba-20200131_lab.xml	Edgar Link	unprocessable
amba-20200131_pre.xml	Edgar Link	unprocessable
amba-ex211_213.htm	Edgar Link	pending
amba-ex231_7.htm	Edgar Link	pending
amba-ex311_6.htm	Edgar Link	pending
amba-ex312_8.htm	Edgar Link	pending
amba-ex321_9.htm	Edgar Link	pending
amba-ex41_146.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
gj2yjkps0uw5000001.jpg	Edgar Link	pending
gj2yjkps0uw5000002.jpg	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$AMBA
AMBARELLA INC Stock $amba

2020 Form 10-K Financial Statement

#000156459020013513 Filed on March 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBA AMBARELLA INC Stock $amba

2020 Form 10-K Financial Statement

#000156459020013513 Filed on March 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBA
AMBARELLA INC Stock $amba