The Company - Additional Information (Detail)	Apr. 30, 2016 Store State
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of retail stores	69
Number of outlet stores	19
Number of states \| State	29

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant