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Income Taxes - Components of Deferred Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified |
Jan. 31, 2015
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Jan. 31, 2014
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| Deferred tax assets: | ||
| Accruals and reserves | $ 1,783us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | $ 2,009us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |
| Deferred revenue | 761us-gaap_DeferredTaxAssetsDeferredIncome | 1,881us-gaap_DeferredTaxAssetsDeferredIncome |
| Stock-based compensation expense | 3,005us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 2,775us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| U.S. federal, state and foreign tax credits | 7,670us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 6,616us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
| Loss carryforwards | 18,298us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 9,071us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Deferred tax assets | 31,517us-gaap_DeferredTaxAssetsGross | 22,352us-gaap_DeferredTaxAssetsGross |
| Less: Valuation allowance | (30,369)us-gaap_DeferredTaxAssetsValuationAllowance | (20,789)us-gaap_DeferredTaxAssetsValuationAllowance |
| Net deferred tax assets | 1,148us-gaap_DeferredTaxAssetsNet | 1,563us-gaap_DeferredTaxAssetsNet |
| Deferred tax liabilities: | ||
| Intangible assets | 1,267us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets | 2,823us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets |
| Other | 74us-gaap_DeferredTaxLiabilitiesOther | 74us-gaap_DeferredTaxLiabilitiesOther |
| Property and equipment | 869us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 283us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
| Total net deferred tax liabilities | $ (1,062)us-gaap_DeferredTaxAssetsLiabilitiesNet | $ (1,617)us-gaap_DeferredTaxAssetsLiabilitiesNet |
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- Details
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from intangible assets including goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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