Stock-Based Compensation - Stock Option Activity under Two Thousand Six Plan (Details) - Employee Stock Plan, 2006 Plan	6 Months Ended
	Jul. 30, 2016 USD ($) $ / shares shares
Number of Shares
Outstanding options at beginning of year | shares	2,728,621
Outstanding options at end of quarter | shares	2,728,621
Options exercisable at end of quarter | shares	1,057,084
Weighted-average exercise price per option
Outstanding options at beginning of year | $ / shares	$ 5.00
Outstanding options at end of quarter | $ / shares	5.00
Options exercisable at end of quarter | $ / shares	$ 4.85
Weighted-average remaining contractual term
Outstanding options at end of quarter	6 years 6 months
Options exercisable at end of quarter	5 years 9 months 18 days
Aggregate Intrinsic Value
Outstanding options at end of quarter | $	$ 637,298
Options exercisable at end of quarter | $	$ 454,935