XML 40 R44.htm IDEA: XBRL DOCUMENT v2.4.1.9
Equity Award Plans - Additional Information (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Options granted to employees and consultants 4,262,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Total compensation expense related to unvested awards granted, not yet recognized $ 35,600,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Total compensation expense related to unvested awards granted, not yet recognized weighted-average period for recognition 2 years 8 months 26 days
2014 Employee Stock Option Plan  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares authorized 1,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Additional shares reserved for future issuance 3,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Percentage of outstanding shares of common stock 1.00%aten_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesReservedForFutureIssuanceIncreasePercentage
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Shares purchased by participants under the 2014 Purchase Plan 568,684us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Shares reserved for future issuance 1,031,316us-gaap_EmployeeStockOwnershipPlanESOPSharesInESOP
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Acquisition price at lower of fair market value, percentage 85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Percentage of eligible compensation through payroll deductions 15.00%aten_EmployeeCommonStockPurchasesThroughPayrollDeductionsUnderEmployeeStockPurchasePlanPriceAsPercentageOfFairMarketValue
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Employee maximum number of shares per purchase period 1,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Employee maximum number of Purchase value of stock per year 25,000aten_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumPurchasesPerYearValue
/ us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis
= aten_TwoThousandFourteenEmployeeStockOptionPlanMember
Description of automatic increase in shares reserved for future issuance On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the least of (i) 3,500,000 shares, (ii) 1% of the outstanding shares of our common stock on the last day of the immediately preceeding fiscal year, or (iii) such other amount as determined by our board of directors
Purchase limit of 2014 ESPP description Purchase limits of 1,500 shares during each six month purchase period or $25,000 worth of stock for each calendar year
Offering period description Each offering period will be approximately twenty-four months in duration, starting on the first trading day on or after May 21 and November 21 of each year, except for the first offering period, which commenced on March 21, 2014 and will end on the last trading day on or before May 20, 2016
Restricted Stock Units (RSUs) [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Granted (in dollars per share) $ 9.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
2014 Stock Incentive Plan  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares authorized 7,700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Number of shares available for future grant 1,343,743us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Options granted, exercisable term (in years) 5 years
2014 Stock Incentive Plan | Stock Options  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Additional shares reserved for future issuance 8,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Percentage of outstanding shares of common stock 5.00%aten_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesReservedForFutureIssuanceIncreasePercentage
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Options granted to employees and consultants 3,550,889us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Description of automatic increase in shares reserved for future issuance On the first day of each fiscal year, starting with January 1, 2015, the number of shares in the reserve will increase by the least of (i) 8,000,000 shares, (ii) 5% of the outstanding shares of common stock on the last day of our immediately preceding fiscal year, or (iii) such other amount as determined by our board of directors.
2014 Stock Incentive Plan | Restricted Stock Units (RSUs) [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Options granted to employees and consultants 3,080,090us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
2014 Stock Incentive Plan | Performance-based Restricted Stock Units Shares  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Options granted to employees and consultants 540,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested $ 2,400,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
Award vesting criteria - consecutive trading days required 20 days
Award vesting criteria - vesting period 4 years
2014 Stock Incentive Plan | Minimum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of exercise price of fair value per share on grant date 110.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
2014 Stock Incentive Plan | Minimum | Non Statutory Stock Option Award  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of exercise price of fair value per share on grant date 100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= aten_NonStatutoryStockOptionAwardMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
2014 Stock Incentive Plan | Minimum | Performance-based Restricted Stock Units Shares  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Granted (in dollars per share) $ 0.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
2014 Stock Incentive Plan | Maximum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Options granted, exercisable term (in years) 10 years
Total combined voting power of all classes of stock 10.00%aten_CombinedVotingPowerOfAllClassesOfStock
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
2014 Stock Incentive Plan | Maximum | Performance-based Restricted Stock Units Shares  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Granted (in dollars per share) $ 1.41us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= aten_TwoThousandFourteenStockIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember