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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, 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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Nov. 26, 2014
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| Commitments and Contingencies Disclosure [Abstract] | ||||
| Demand notes payable | $ 20.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity | |||
| Operating leases, rent expense | $ 2.9us-gaap_OperatingLeasesRentExpenseNet | $ 2.4us-gaap_OperatingLeasesRentExpenseNet | $ 2.7us-gaap_OperatingLeasesRentExpenseNet | |
| Operating lease expiration year | 2019 | |||
| X | ||||||||||
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- Definition
Operating lease expiration year. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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