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

X

- 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

X

- 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

X

- Details

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Namespace Prefix:	us-gaap_
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