Shareholders' Equity - Employee Stock Purchase Plan - Additional Information (Detail)	3 Months Ended
	May 02, 2015	May 03, 2014	Mar. 20, 2014	Mar. 19, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
Employee Stock Purchase Plan (“ESPP”) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of discount in purchasing common stock from fair market value under ESPP		10.00%
Period of service for eligibility in the ESPP		3 months
Number of authorized shares			2,500,000	2,100,000