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Nature of Business - Additional Information (Details) | Jan. 31, 2015 States Stores
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Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Number of stores | 55 us-gaap_NumberOfStores
Number of states | 18 us-gaap_NumberOfStatesInWhichEntityOperates

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the number of stores. + References No definition available. + Details
Name: | us-gaap_NumberOfStores
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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