Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) (Fair Value, Inputs, Level 3 [Member], USD $)
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3 Months Ended |
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Apr. 30, 2015
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Fair Value, Inputs, Level 3 [Member]
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
Liability, fair value adjustment |
$ 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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- Details
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- Definition
Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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