Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]	Accumulated Foreign Currency Adjustment Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Feb. 01, 2014	39,083,961	(4,659,143)
Balance at Feb. 01, 2014	$ 485,188	$ (88,198)	$ 149	$ 502	$ (239,250)	$ 158,391
Unrealized loss on marketable securities			(176)			(176)
Currency translation adjustments				(1,586)		(1,586)
Stock-based compensation expense	6,279					6,279
Net share settlement of equity awards	$ (231)					(231)
Net proceeds from common stock issued under share plans (in shares)	889,728
Net proceeds from common stock issued under share plans	$ 2,314					2,314
Net loss					(21,701)	(21,701)
Balance (in shares) at Jan. 31, 2015	39,973,689	(4,659,143)
Balance at Jan. 31, 2015	$ 493,550	$ (88,198)	(27)	(1,084)	(260,951)	143,290
Net share settlement of equity awards	(231)					(231)
Unrealized loss on marketable securities			(181)			(181)
Currency translation adjustments				(583)		(583)
Stock-based compensation expense	6,559					6,559
Net share settlement of equity awards	$ (81)	$ (138)				(219)
Net proceeds from common stock issued under share plans (in shares)	1,450,688
Net proceeds from common stock issued under share plans	$ 3,781					3,781
Net loss					158	158
Balance (in shares) at Jan. 30, 2016	41,424,377	(4,675,749)
Balance at Jan. 30, 2016	$ 503,809	$ (88,336)	(208)	(1,667)	(260,793)	152,805
Net share settlement of equity awards (in shares)		(16,606)
Net share settlement of equity awards	$ (81)	$ (138)				(219)
Unrealized loss on marketable securities						33
Net loss						(18,315)
Balance (in shares) at Jan. 28, 2017	42,806,279	(4,675,749)
Balance at Jan. 28, 2017	$ 513,168	$ (88,336)	$ (175)	$ (2,003)	$ (279,108)	$ 143,546