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Summary of Significant Accounting Policies (Property and Equipment) - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	May 04, 2013	Apr. 28, 2012	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Significant Accounting Policies [Line Items]
Depreciation and amortization expense	$ 2,933	$ 2,107	$ 9,599	$ 7,071	$ 4,805
Leasehold improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives			10 years
Minimum [Member] \| Furniture and fixtures [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives			3 years
Maximum [Member] \| Furniture and fixtures [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives			10 years

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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