$AMBA
AMBARELLA INC Stock $amba

$amba Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-K Financial Statement

#000119312513141693 Filed on April 04, 2013

Income Statement

Concept	2013 Q1	2013	2012 Q1
Revenue	$31.50M	$121.1M	$24.60M
YoY Change	28.05%	24.48%
Cost Of Revenue	$11.60M	$40.41M	$7.800M
YoY Change	48.72%	24.48%
Gross Profit	$19.90M	$80.66M	$16.80M
YoY Change	18.45%	24.48%
Gross Profit Margin	63.17%	66.63%	68.29%
Selling, General & Admin	$5.100M	$17.93M	$4.700M
YoY Change	8.51%	12.56%
% of Gross Profit	25.63%	22.22%	27.98%
Research & Development	$11.20M	$42.83M	$10.00M
YoY Change	12.0%	13.85%
% of Gross Profit	56.28%	53.1%	59.52%
Depreciation & Amortization	$200.0K	$737.0K	$200.0K
YoY Change	0.0%	23.66%
% of Gross Profit	1.01%	0.91%	1.19%
Operating Expenses	$16.30M	$60.76M	$14.70M
YoY Change	10.88%	13.47%
Operating Profit	$3.600M	$19.91M	$2.100M
YoY Change	71.43%	76.86%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$0.00	$136.0K	-$100.0K
YoY Change	-100.0%	-251.11%
Pretax Income	$3.600M	$20.04M	$2.000M
YoY Change	80.0%	79.51%
Income Tax	$0.00	$1.854M	$300.0K
% Of Pretax Income	0.0%	9.25%	15.0%
Net Earnings	$3.600M	$18.19M	$1.800M
YoY Change	100.0%	85.19%
Net Earnings / Revenue	11.43%	15.02%	7.32%
Basic Earnings Per Share		$0.64
Diluted Earnings Per Share	$126.3K	$0.60	$181.8K
COMMON SHARES
Basic Shares Outstanding	27.04M shares	13.51M
Diluted Shares Outstanding		15.02M

Balance Sheet

Concept	2013 Q1	2013	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$100.5M	$100.5M	$58.90M
YoY Change	70.63%	70.63%
Cash & Equivalents	$100.5M	$100.5M	$58.94M
Short-Term Investments
Other Short-Term Assets	$3.600M	$3.600M	$2.600M
YoY Change	38.46%	38.46%
Inventory	$8.918M	$8.900M	$6.786M
Prepaid Expenses
Receivables	$20.15M	$20.20M	$9.485M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$133.1M	$133.1M	$77.82M
YoY Change	71.1%	71.08%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.536M	$2.500M	$1.686M
YoY Change	50.42%	47.06%
Goodwill
YoY Change
Intangibles	$0.00		$270.0K
YoY Change	-100.0%
Long-Term Investments
YoY Change
Other Assets	$1.981M	$2.900M	$1.538M
YoY Change	28.8%	45.0%
Total Long-Term Assets	$5.455M	$5.500M	$3.920M
YoY Change	39.16%	41.03%
TOTAL ASSETS
Total Short-Term Assets	$133.1M	$133.1M	$77.82M
Total Long-Term Assets	$5.455M	$5.500M	$3.920M
Total Assets	$138.6M	$138.6M	$81.74M
YoY Change	69.57%	69.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$7.051M	$7.100M	$6.481M
YoY Change	8.79%	9.23%
Accrued Expenses	$14.04M	$14.00M	$7.931M
YoY Change	77.05%	77.22%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$24.83M	$24.80M	$22.94M
YoY Change	8.22%	8.3%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$1.441M	$1.400M	$1.246M
YoY Change	15.65%	0.0%
Total Long-Term Liabilities	$1.441M	$1.400M	$1.246M
YoY Change	15.65%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$24.83M	$24.80M	$22.94M
Total Long-Term Liabilities	$1.441M	$1.400M	$1.246M
Total Liabilities	$26.27M	$26.30M	$24.39M
YoY Change	7.71%	7.79%
SHAREHOLDERS EQUITY
Retained Earnings	$20.41M		$2.221M
YoY Change	818.91%
Common Stock	$12.00K		$3.000K
YoY Change	300.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$112.3M	$112.3M	$6.449M
YoY Change
Total Liabilities & Shareholders Equity	$138.6M	$138.6M	$81.70M
YoY Change	69.65%	69.65%

Cashflow Statement

Concept	2013 Q1	2013	2012 Q1
OPERATING ACTIVITIES
Net Income	$3.600M	$18.19M	$1.800M
YoY Change	100.0%	85.19%
Depreciation, Depletion And Amortization	$200.0K	$737.0K	$200.0K
YoY Change	0.0%	23.66%
Cash From Operating Activities	$1.400M	$10.51M	$7.000M
YoY Change	-80.0%	-17.12%
INVESTING ACTIVITIES
Capital Expenditures	-$500.0K	$1.528M	-$200.0K
YoY Change	150.0%	124.05%
Acquisitions
YoY Change
Other Investing Activities	$300.0K	$500.0K	$0.00
YoY Change		-350.0%
Cash From Investing Activities	-$200.0K	-$1.014M	-$300.0K
YoY Change	-33.33%	-31.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00	$7.228M
YoY Change		-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	4.500M	32.05M	4.600M
YoY Change	-2.17%	448.24%
NET CHANGE
Cash From Operating Activities	1.400M	10.51M	7.000M
Cash From Investing Activities	-200.0K	-1.014M	-300.0K
Cash From Financing Activities	4.500M	32.05M	4.600M
Net Change In Cash	5.700M	41.55M	11.30M
YoY Change	-49.56%	143.72%
FREE CASH FLOW
Cash From Operating Activities	$1.400M	$10.51M	$7.000M
Capital Expenditures	-$500.0K	$1.528M	-$200.0K
Free Cash Flow	$1.900M	$8.986M	$7.200M
YoY Change	-73.61%	-25.14%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2013Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.00045
CY2013Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	14419000
CY2013Q1	us-gaap	Temporary Equity Redemption Value TemporaryEquityRedemptionValue	0
CY2013Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q1	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2013Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights	3.582
CY2013Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2536000
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	3085000
CY2013Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2013Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27035074	shares
CY2013Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2100000
CY2013Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1243000
CY2013Q1	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1243000
CY2013Q1	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	0
CY2013Q1	us-gaap	Assets Current AssetsCurrent	133148000
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	4110000
CY2013Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	91911000
CY2013Q1	us-gaap	Construction In Progress Gross ConstructionInProgressGross	827000
CY2013Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2111000
CY2013Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.00045
CY2013Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4190000
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	6.02
CY2013Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	116000
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	112332000
CY2013Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	0
CY2013Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	14774000
CY2013Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1441000
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	10000
CY2013Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	6674000
CY2013Q1	amba	Accounts Receivable From Major Customers AccountsReceivableFromMajorCustomers	17600000
CY2013Q1	amba	Computer Equipment And Software ComputerEquipmentAndSoftware	2810000
CY2013Q1	amba	Foreign Deferred Tax Assets ForeignDeferredTaxAssets	60000
CY2013Q1	amba	Accrued Development Cost Liabilities AccruedDevelopmentCostLiabilities	2875000
CY2013Q1	amba	Accrued Rebates AccruedRebates	272000
CY2013Q1	amba	Deferred Income Net DeferredIncomeNet	3451000
CY2013Q1	amba	Voting Power Ownership Percentage VotingPowerOwnershipPercentage	0.10	pure
CY2013Q1	amba	Property And Equipment PropertyAndEquipment	2050000
CY2013Q1	amba	Deferred Income Taxes And Taxes Payable Noncurrent DeferredIncomeTaxesAndTaxesPayableNoncurrent	1400000
CY2013Q1	amba	Ordinary Shares Reserved For Future Issuance Of Stock Option And Restricted Stock Units OrdinarySharesReservedForFutureIssuanceOfStockOptionAndRestrictedStockUnits	5818126	shares
CY2013Q1	amba	Deferred Revenue From Product Shipments DeferredRevenueFromProductShipments	3827000
CY2013Q1	amba	Deferred Revenue From Licenses DeferredRevenueFromLicenses	485000
CY2013Q1	amba	Deferred Cost Of Revenue From Product Shipments DeferredCostOfRevenueFromProductShipments	861000
CY2013Q1	amba	Manufacturing Purchase Commitment Current ManufacturingPurchaseCommitmentCurrent	15100000
CY2013Q1	amba	Liabilities Redeemable Convertible Preference Shares And Shareholders Equity LiabilitiesRedeemableConvertiblePreferenceSharesAndShareholdersEquity	138603000
CY2013Q1	amba	Aggregate Intrinsic Value Of Unvested Restricted Stock Units AggregateIntrinsicValueOfUnvestedRestrictedStockUnits	3400000
CY2013Q1	amba	Unvested Stock Options Exercised UnvestedStockOptionsExercised	210000
CY2013Q1	amba	Ordinary Shares Reserved For Future Preference Shares Conversion OrdinarySharesReservedForFuturePreferenceSharesConversion	0	shares
CY2013Q1	amba	Ordinary Shares Reserved For Employee Stock Purchase Plan OrdinarySharesReservedForEmployeeStockPurchasePlan	460445	shares
CY2013Q1	amba	Ordinary Shares Reserved For Future Exercise Of Warrants OrdinarySharesReservedForFutureExerciseOfWarrants	36292	shares
CY2013Q1	amba	Closing Market Price Of Ordinary Shares On Nasdaq On Last Day Of Reporting Period ClosingMarketPriceOfOrdinarySharesOnNasdaqOnLastDayOfReportingPeriod	9.96
CY2013Q1	amba	Incremental Ordinary Shares Attributable To Over Allotment Shares IncrementalOrdinarySharesAttributableToOverAllotmentShares	10634	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.99
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	344671	shares
	amba	Vesting Period For Restricted Stock Units VestingPeriodForRestrictedStockUnits	1/16th of the RSUs shall vest each 3 months, 100% vest on the fourth anniversary date
CY2012Q4	us-gaap	Convertible Preferred Stock Terms Of Conversion ConvertiblePreferredStockTermsOfConversion	Converted into ordinary shares on a one-to-one basis
CY2012Q4	amba	Proceeds From Initial Public Offering ProceedsFromInitialPublicOffering	25400000
CY2012Q4	amba	Shares Issued During Period Shares Sold By Selling Shareholders SharesIssuedDuringPeriodSharesSoldBySellingShareholders	1095349	shares
CY2012Q4	amba	Share Issued During Period Shares Initial Public Offering ShareIssuedDuringPeriodSharesInitialPublicOffering	6000000	shares
CY2012Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7200000
CY2012Q1	amba	Ordinary Shares Repurchased By Entity OrdinarySharesRepurchasedByEntity	698424	shares
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	100779	shares
CY2011	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	172000
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10000
CY2011	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	9749000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12672000
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	227000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	2059000
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	657000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.11
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	1024629	shares
CY2011	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0
CY2011	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	34449000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2758000
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7458627	shares
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	28000
CY2011	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-5000000
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Research And Development IncomeTaxReconciliationNondeductibleExpenseResearchAndDevelopment	-571000
CY2011	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-536000
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-260000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	670000
CY2011	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	4302000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	1856000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	8.77
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1648446	shares
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	15297000
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	366000
CY2011	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	830000
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	15477000
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9107073	shares
CY2011	us-gaap	Weighted Average Number Of Shares Common Stock Subject To Repurchase Or Cancellation WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation	-320997	shares
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	213000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34	pure
CY2011	us-gaap	Gross Profit GrossProfit	60239000
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	244000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	306000
CY2011	us-gaap	Proceeds From Issuance Of Convertible Preferred Stock ProceedsFromIssuanceOfConvertiblePreferredStock	0
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	27000
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	111000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1856000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	4.04
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5731000
CY2011	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	487000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	13929000
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-47000
CY2011	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.91	pure
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	258000
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2011	us-gaap	Operating Expenses OperatingExpenses	44762000
CY2011	us-gaap	Revenues Revenues	94739000
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	138000
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	10313000
CY2011	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P3Y
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1501000
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	243000
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	896000
CY2011	us-gaap	Share Based Goods And Nonemployee Services Transaction Expense ShareBasedGoodsAndNonemployeeServicesTransactionExpense
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1040000
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	125000
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1014000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	61151	shares
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	708000
CY2011	us-gaap	Depreciation Depreciation	563000
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-4000
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1856000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	15430000
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	13262510	shares
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	4000
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2600000
CY2011	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3577000
CY2011	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	22000
CY2011	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0
CY2011	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-322000
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4522000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.12
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	155000
CY2011	us-gaap	Property Plant And Equipment Useful Life PropertyPlantAndEquipmentUsefulLife	P3Y
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	9000
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1575000
CY2011	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	46000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00	pure
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5246000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	473000
CY2011	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13025000
CY2011	us-gaap	Cost Of Revenue CostOfRevenue	34500000
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0
CY2011	amba	Vesting Of Early Exercised Stock Options VestingOfEarlyExercisedStockOptions	404000
CY2011	amba	Change In Deferred Tax Assets ChangeInDeferredTaxAssets	486000
CY2011	amba	Percentage Of License Revenue To Revenue PercentageOfLicenseRevenueToRevenue	0.02	pure
CY2011	amba	Vesting Period Of Stock Options VestingPeriodOfStockOptions	Vest 25% on the first anniversary date of the grant and the remainder ratably over the following 36 months
CY2011	amba	Maximum Period That Stock Option Can Be Exercised MaximumPeriodThatStockOptionCanBeExercised	P10Y
CY2011	amba	Value Of Stock Issued Net Of Early Exercised Stock Options ValueOfStockIssuedNetOfEarlyExercisedStockOptions	140000
CY2011	amba	Proceeds From Exercise Of Stock Options And Employee Stock Purchase Plan Withholding Net Of Repurchase Of Stock Options ProceedsFromExerciseOfStockOptionsAndEmployeeStockPurchasePlanWithholdingNetOfRepurchaseOfStockOptions	213000
CY2011	amba	Net Income Available To Ordinary Shareholders Basic NetIncomeAvailableToOrdinaryShareholdersBasic	4008000
CY2011	amba	Additional Undistributed Earnings Allocated To Ordinary Shareholders AdditionalUndistributedEarningsAllocatedToOrdinaryShareholders	514000
CY2011	amba	Weighted Average Number Of Ordinary Shares Outstanding WeightedAverageNumberOfOrdinarySharesOutstanding	7779624	shares
CY2011	amba	Conversion Of Preference Share Warrants To Ordinary Share Warrants ConversionOfPreferenceShareWarrantsToOrdinaryShareWarrants	0
CY2011	amba	Change In Fair Value Of Convertible Preference Share Warrant Liability ChangeInFairValueOfConvertiblePreferenceShareWarrantLiability	0
CY2011	amba	Investment Under Cost Method Accounting InvestmentUnderCostMethodAccounting	-972000
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	454053	shares
CY2012	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	51000
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-36000
CY2012	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	7204000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	8242000
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	113000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1484000
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	854000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.91
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	1207564	shares
CY2012	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0
CY2012	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	37618000
CY2012	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	125000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2923000
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7961944	shares
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-47000
CY2012	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	0
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Research And Development IncomeTaxReconciliationNondeductibleExpenseResearchAndDevelopment	-623000
CY2012	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-2419000
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	656000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2682000
CY2012	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	132000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	3616000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	8.82
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1507876	shares
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	17048000
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	537000
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26000
CY2012	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	630000
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	11255000
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	473000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3616000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	6.78
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-624000
CY2012	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-146000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	9821000
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-90000
CY2012	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.80	pure
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	206000
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	139000
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7228000
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9469820	shares
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5846000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34	pure
CY2012	us-gaap	Gross Profit GrossProfit	64799000
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	311000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	962000
CY2012	us-gaap	Weighted Average Number Of Shares Common Stock Subject To Repurchase Or Cancellation WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation	-156890	shares
CY2012	us-gaap	Proceeds From Issuance Of Convertible Preferred Stock ProceedsFromIssuanceOfConvertiblePreferredStock	11627000
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	511000
CY2012	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0
CY2012	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1336000
CY2012	us-gaap	Operating Expenses OperatingExpenses	53544000
CY2012	us-gaap	Revenues Revenues	97257000
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	34000
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	15926000
CY2012	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P3Y
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1344000
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	274000
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	682000
CY2012	us-gaap	Share Based Goods And Nonemployee Services Transaction Expense ShareBasedGoodsAndNonemployeeServicesTransactionExpense
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	125000
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	540000
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	59000
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1490000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	192387	shares
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	502000
CY2012	us-gaap	Depreciation Depreciation	596000
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-23000
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3616000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11165000
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14236680	shares
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-37000
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3900000
CY2012	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2306000
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	37000
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	2843000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.24
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	244000
CY2012	us-gaap	Property Plant And Equipment Useful Life PropertyPlantAndEquipmentUsefulLife	P3Y
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-13000
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-244000
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	280000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00	pure
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3796000
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-73000
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12686000
CY2012	us-gaap	Cost Of Revenue CostOfRevenue	32458000
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	125000
CY2012	amba	Vesting Of Early Exercised Stock Options VestingOfEarlyExercisedStockOptions	394000
CY2012	amba	Unvested Stock Option Subject To Repurchase UnvestedStockOptionSubjectToRepurchase	122064	shares
CY2012	amba	Change In Deferred Tax Assets ChangeInDeferredTaxAssets	-149000
CY2013	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	30440000
CY2012	amba	Percentage Of License Revenue To Revenue PercentageOfLicenseRevenueToRevenue	0.03	pure
CY2012	amba	Accelerated Unvested Stock Options AcceleratedUnvestedStockOptions	22222	shares
CY2012	amba	Exercised But Unvested Stock Options Repurchased During Reporting Period ExercisedButUnvestedStockOptionsRepurchasedDuringReportingPeriod	76982	shares
CY2012	amba	Vesting Period Of Stock Options VestingPeriodOfStockOptions	Vest 25% on the first anniversary date of the grant and the remainder ratably over the following 36 months
CY2012	amba	Maximum Period That Stock Option Can Be Exercised MaximumPeriodThatStockOptionCanBeExercised	P10Y
CY2012	amba	Value Of Stock Issued Net Of Early Exercised Stock Options ValueOfStockIssuedNetOfEarlyExercisedStockOptions	824000
CY2012	amba	Proceeds From Exercise Of Stock Options And Employee Stock Purchase Plan Withholding Net Of Repurchase Of Stock Options ProceedsFromExerciseOfStockOptionsAndEmployeeStockPurchasePlanWithholdingNetOfRepurchaseOfStockOptions	1322000
CY2012	amba	Stock Repurchased During Period Amount StockRepurchasedDuringPeriodAmount	7227000
CY2012	amba	Net Income Available To Ordinary Shareholders Basic NetIncomeAvailableToOrdinaryShareholdersBasic	2566000
CY2012	amba	Additional Undistributed Earnings Allocated To Ordinary Shareholders AdditionalUndistributedEarningsAllocatedToOrdinaryShareholders	277000
CY2012	amba	Weighted Average Number Of Ordinary Shares Outstanding WeightedAverageNumberOfOrdinarySharesOutstanding	8118834	shares
CY2012	amba	Conversion Of Preference Share Warrants To Ordinary Share Warrants ConversionOfPreferenceShareWarrantsToOrdinaryShareWarrants	0
CY2012	amba	Change In Fair Value Of Convertible Preference Share Warrant Liability ChangeInFairValueOfConvertiblePreferenceShareWarrantLiability	103000
CY2012	amba	Ordinary Shares Repurchased By Entity OrdinarySharesRepurchasedByEntity	698424	shares
CY2012	amba	Investment Under Cost Method Accounting InvestmentUnderCostMethodAccounting	102000
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-01-31
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0001280263
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--01-31
CY2013	dei	Trading Symbol TradingSymbol	AMBA
CY2013	dei	Entity Registrant Name EntityRegistrantName	Ambarella Inc
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y9M11D
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	313827	shares
CY2013	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	61000
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-109000
CY2013	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	9517000
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	16778000
CY2013	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	443000
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1014000
CY2013	us-gaap	Income Taxes Paid IncomeTaxesPaid	3402000
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	3.21
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	451071	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.99
CY2013	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	42829000
CY2013	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	7000
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	3264000
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13511646	shares
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-132000
CY2013	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	0
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y2M1D
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Research And Development IncomeTaxReconciliationNondeductibleExpenseResearchAndDevelopment	-890000
CY2013	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-4751000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
CY2013	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	10668000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2087000
CY2013	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	58000
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	4999000
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	8.79
CY2013	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1443809	shares
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	41550000
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	682000
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000
CY2013	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	19906000
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	507000
CY2013	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4999000
CY2013	us-gaap	Stockholders Equity Reverse Stock Split StockholdersEquityReverseStockSplit	One (1) ordinary share for every four and one half (4.5) authorized, issued and outstanding ordinary shares and one (1) preference share for every four and one half (4.5) authorized, issued and outstanding preference shares (the "Stock Split").
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	7.22
CY2013	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	50900000
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2132000
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y9M22D
CY2013	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	50900000
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-874000
CY2013	us-gaap	Net Income Loss NetIncomeLoss	18188000
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	136000
CY2013	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.80	pure
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	210000
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15016986	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	6737	shares
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	32050000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	9.99
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.34	pure
CY2013	us-gaap	Gross Profit GrossProfit	80661000
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	325000
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2022000
CY2013	us-gaap	Weighted Average Number Of Shares Common Stock Subject To Repurchase Or Cancellation WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation	-87627	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod		shares
CY2013	us-gaap	Proceeds From Issuance Of Convertible Preferred Stock ProceedsFromIssuanceOfConvertiblePreferredStock	0
CY2013	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1134000
CY2013	us-gaap	Operating Expenses OperatingExpenses	60755000
CY2013	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	16930	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	27230	shares
CY2013	us-gaap	Revenues Revenues	121066000
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	690000
CY2013	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	17926000
CY2013	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P3Y
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1854000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	5954	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	345171	shares
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-514000
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	30415000
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1528000
CY2013	us-gaap	Share Based Goods And Nonemployee Services Transaction Expense ShareBasedGoodsAndNonemployeeServicesTransactionExpense
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0
CY2013	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	270000
CY2013	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	122000
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2728000
CY2013	us-gaap	Deferred Tax Liability Not Recognized Description Of Temporary Difference DeferredTaxLiabilityNotRecognizedDescriptionOfTemporaryDifference	2.9
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	168615	shares
CY2013	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	701000
CY2013	us-gaap	Depreciation Depreciation	737000
CY2013	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-4000
CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4999000
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	20042000
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11378720	shares
CY2013	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-22000
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	4300000
CY2013	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-4513000
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px; MARGIN-LEFT: 4%"> <font style="FONT-FAMILY: Times New Roman" size="2"><b><i>Use of Estimates</i></b></font></p> <p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">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, and 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.</font></p> <p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">On an ongoing basis, management evaluates its estimates and assumptions, including those related to (i) the collectability of accounts receivable; (ii) write downs for excess and obsolete inventories; (iii) the estimated useful lives of long-lived assets; (iv) impairment of long-lived assets and financial instruments; (v) warranty obligations; (vi) the valuation of equity instruments; (vii) the realization of tax assets and estimates of tax liabilities, including reserves for uncertain tax positions; and (viii) 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 and assets associated with various contractual arrangements, and the valuation of preference and ordinary shares. 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.</font></p> </div>
CY2013	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	23000
CY2013	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	25000
CY2013	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	6508000
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	9042000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.23
CY2013	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-244000
CY2013	us-gaap	Property Plant And Equipment Useful Life PropertyPlantAndEquipmentUsefulLife	P3Y
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-107000
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	193000
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10514000
CY2013	us-gaap	Cost Of Revenue CostOfRevenue	40405000
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-7000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00	pure
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6814000
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-743000
CY2013	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts
CY2013	amba	Unvested Stock Option Subject To Repurchase UnvestedStockOptionSubjectToRepurchase	53151	shares
CY2013	amba	Change In Deferred Tax Assets ChangeInDeferredTaxAssets	-871000
CY2013	amba	Effective Date Of Stock Split EffectiveDateOfStockSplit	2012-08-24
CY2013	amba	Percentage Of Purchase Plan Price Per Share Equal To Fair Market Value PercentageOfPurchasePlanPricePerShareEqualToFairMarketValue	0.85	pure
CY2013	amba	Vesting Period For Restricted Stock Units VestingPeriodForRestrictedStockUnits	1/16th of the RSUs shall vest each 3 months, 100% vest on the fourth anniversary date
CY2013	amba	Vesting Of Early Exercised Stock Options VestingOfEarlyExercisedStockOptions	314000
CY2013	amba	Percentage Of License Revenue To Revenue PercentageOfLicenseRevenueToRevenue	0.02	pure
CY2013	amba	Exercised But Unvested Stock Options Repurchased During Reporting Period ExercisedButUnvestedStockOptionsRepurchasedDuringReportingPeriod	84377	shares
CY2013	amba	Vesting Period Of Stock Options VestingPeriodOfStockOptions	Vest 25% on the first anniversary date of the grant and the remainder ratably over the following 36 months
CY2013	amba	Maximum Period That Stock Option Can Be Exercised MaximumPeriodThatStockOptionCanBeExercised	P10Y
CY2013	amba	Ordinary Share Warrants OrdinaryShareWarrants	36292	shares
CY2013	amba	Minimum Percentage Of Voting Stock Used To Define Related Party MinimumPercentageOfVotingStockUsedToDefineRelatedParty	0.10	pure
CY2013	amba	Contribution To Employee Stock Purchase Plan As Percentage Of Employee Salary ContributionToEmployeeStockPurchasePlanAsPercentageOfEmployeeSalary	0.10	pure
CY2013	amba	Value Of Stock Issued Net Of Early Exercised Stock Options ValueOfStockIssuedNetOfEarlyExercisedStockOptions	950000
CY2013	amba	Proceeds From Exercise Of Stock Options And Employee Stock Purchase Plan Withholding Net Of Repurchase Of Stock Options ProceedsFromExerciseOfStockOptionsAndEmployeeStockPurchasePlanWithholdingNetOfRepurchaseOfStockOptions	1610000
CY2013	amba	Conversion Of Preference Share Warrants To Ordinary Share Warrants Value ConversionOfPreferenceShareWarrantsToOrdinaryShareWarrantsValue	110000
CY2013	amba	Net Income Available To Ordinary Shareholders Basic NetIncomeAvailableToOrdinaryShareholdersBasic	8610000
CY2013	amba	Additional Undistributed Earnings Allocated To Ordinary Shareholders AdditionalUndistributedEarningsAllocatedToOrdinaryShareholders	432000
CY2013	amba	Weighted Average Number Of Ordinary Shares Outstanding WeightedAverageNumberOfOrdinarySharesOutstanding	13599273	shares
CY2013	amba	Conversion Of Preference Share Warrants To Ordinary Share Warrants ConversionOfPreferenceShareWarrantsToOrdinaryShareWarrants	110000
CY2013	amba	Change In Fair Value Of Convertible Preference Share Warrant Liability ChangeInFairValueOfConvertiblePreferenceShareWarrantLiability	-149000
CY2013	amba	Investment Under Cost Method Accounting InvestmentUnderCostMethodAccounting	0
CY2012Q4	amba	Proceeds From Overallotment Options Exercised ProceedsFromOverallotmentOptionsExercised	5000000

Files In Submission

Name	View Source	Status
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$AMBA
AMBARELLA INC Stock $amba

2013 Q1 Form 10-K Financial Statement

#000119312513141693 Filed on April 04, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBA AMBARELLA INC Stock $amba

2013 Q1 Form 10-K Financial Statement

#000119312513141693 Filed on April 04, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBA
AMBARELLA INC Stock $amba