Shareholders' Equity - Employee Stock Purchase Plan - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2013	Feb. 01, 2014	Feb. 01, 2014	Feb. 02, 2013	Jan. 28, 2012	Mar. 20, 2014 ESPP [Member] Subsequent Event [Member]	Mar. 19, 2014 ESPP [Member] Subsequent Event [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 in which stock option expires under condition			3 months
Purchasing period of stock under ESPP	6 months	1 year
Period of service for eligibility in the ESPP			3 months
Number of shares authorized						2,500,000	2,100,000
Compensation expenses related to ESPP			$ 0.1	$ 0.1	$ 0.1
Shares issued under ESPP			149,398	236,668	212,025
Average price at which shares issued under ESPP			$ 1.50	$ 1.50	$ 1.58