Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Commitments And Contingencies Disclosure [Abstract]
Estimated costs associated with the replacement program					$ 672,000
Replacement costs charged against the reserve		256,000		256,000
Other Accrued Expenses		416,000		416,000
Non-refundable settlement from supplier for recovery	$ 450,000
Period of receiving lower product prices				3 years