Income Taxes - Summary of Changes in Total Gross Amount of Unrecognized Tax Benefits (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jan. 31, 2015
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Jan. 31, 2014
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Jan. 31, 2013
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Income Tax Disclosure [Abstract] | |||
Beginning balance | $ 2,439us-gaap_UnrecognizedTaxBenefits | $ 1,220us-gaap_UnrecognizedTaxBenefits | $ 644us-gaap_UnrecognizedTaxBenefits |
Increases related to tax positions taken during the prior period | 169us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 28us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | |
Increases related to tax positions taken during the current period | 869us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 1,191us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 576us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions |
Lapse of statute of limitations | (230)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | ||
Ending balance | $ 3,247us-gaap_UnrecognizedTaxBenefits | $ 2,439us-gaap_UnrecognizedTaxBenefits | $ 1,220us-gaap_UnrecognizedTaxBenefits |
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- Details
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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