Consolidated Statement of Shareholders' Equity - 3 months ended Apr. 30, 2016 - USD ($) $ in Thousands	Total	Common stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated deficit [Member]
Balance at Jan. 30, 2016	$ 244,481	$ 546		$ 306,522	$ (62,587)
Balance, common stock, shares at Jan. 30, 2016	54,590,641	54,590,641
Share-based compensation expense	$ 2,813			2,813	0
Issuance of unrestricted stock awards (in shares)		1,676
Issuance of unrestricted stock awards	$ 70	$ 0		70	0
Exercise of options to purchase common stock (in shares)	88,654	88,654
Exercise of options to purchase common stock	$ 1,127	$ 1		1,126	0
Vesting of restricted and performance-based stock units (in shares)		77,904
Common shares withheld for taxes (in shares)			(33,940)
Common shares withheld for taxes	(1,299)			(1,299)
Excess tax benefit related to exercises of stock options	367			367
Net income	6,758				6,758
Balance at Apr. 30, 2016	$ 254,317	$ 547		$ 309,599	$ (55,829)
Balance, common stock, shares at Apr. 30, 2016	54,724,935	54,724,935.000