Capitalization (Details 3) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Shares
Outstanding at the beginning of the period (in shares)	1,185,767	1,156,834	1,075,000
Granted (in shares)	335,000	188,000	168,500
Exercised (in shares)	(261,097)	(125,065)	(3,332)
Expired/forfeited (in shares)	(146,667)	(34,002)	(83,334)
Outstanding at the end of the period (in shares)	1,113,003	1,185,767	1,156,834	1,075,000
Vested and Exercisable at the end of the period (in shares)	570,828
Weighted Average Price
Outstanding at the beginning of the period (in dollars per share)	$ 15.89	$ 16.02	$ 16.37
Granted (in dollars per share)	22.79	13.82	12.92
Exercised (in dollars per share)	17.06	14.83	10.92
Canceled/forfeited (in dollars per share)	17.33	12.58	14.57
Outstanding at the end of the period (in dollars per share)	17.50	$ 15.89	$ 16.02	$ 16.37
Vested and Exercisable at the end of the period (in dollars per share)	$ 15.38
Weighted Average Remaining Contractual Term (in years)
Outstanding	4 years 22 days	3 years 5 months 27 days	3 years 10 months 6 days	4 years 5 months 27 days
Vested and Exercisable at the end of the period	2 years 9 months
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 1,339	$ 2,910	$ 436	$ 425
Vested and Exercisable at the end of the period (in dollars)	$ 983
Fair value
Weighted average grant date fair value of options granted (in dollars per share)	$ 6.35	$ 3.49	$ 4.09
Intrinsic value of options exercised (in dollars)	$ 1,731	$ 411	$ 6
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense (in dollars)	$ 2,000
Weighted average period for recognition of unrecognized stock-based compensation expense	2 years 1 month 10 days
Total fair value of vested options (in dollars)	$ 700	$ 700	$ 800