Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Feb. 01, 2014	Feb. 02, 2013	Jan. 28, 2012
Accounting Policies [Line Items]
Shipping and handling cost	$ 6,600,000	$ 5,600,000	$ 5,100,000
Inventory markdowns	35,700,000	32,200,000	23,200,000
Reserve for unexecuted markdowns	900,000	500,000
Asset impairment	1,840,000		554,000
Capitalized, offering cost	0	0	1,500,000
Liability for unredeemed gift cards	6,200,000	5,500,000
Breakage revenue for gift cards	600,000	400,000	500,000
Advertising expense	9,100,000	8,400,000	6,600,000
Incremental common shares used in calculating diluted EPS	294,000	420,000	500,000
FDIC insured amount	250,000	250,000
Selling, General and Administrative Expenses
Accounting Policies [Line Items]
Asset impairment	$ 1,840,000		$ 554,000
Furniture and Fixtures
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Computer Software
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum | Cash and Cash Equivalents
Accounting Policies [Line Items]
Short term investment maturity period	90 days
Maximum | Equipment
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Minimum | Equipment
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years