Stock-Based Compensation - Stock Option Activity under Two Thousand Six Plan (Details) - USD ($)		6 Months Ended
		Aug. 01, 2015	Aug. 02, 2014
Number of shares
Options granted		0	106,882
Employee Stock Plan, 2006 Plan
Number of shares
Outstanding options at beginning of year		2,747,802
Options canceled		(13,791)
Options exercised	[1]	(12,136)
Outstanding options at end of quarter		2,721,875
Options exercisable at end of quarter		636,446
Weighted-average exercise price per option
Outstanding options at beginning of year		$ 4.97
Options canceled		5.04
Options exercised	[1]	5.04
Outstanding options at end of quarter		4.97
Options exercisable at end of quarter		$ 4.74
Weighted-average remaining contractual term
Outstanding options at end of quarter		7 years 4 months 24 days
Options exercisable at end of quarter		5 years 10 months 24 days
Aggregate Intrinsic Value
Outstanding options at end of quarter		$ 305,537
Options exercisable at end of quarter		$ 276,036

[1] The intrinsic value of options exercised was immaterial.