Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Treasury Stock [Member]	Accumulated Net Unrealized Investment Gain (Loss) [Member]	Accumulated Translation Adjustment [Member]	Retained Earnings [Member]	Total
Balance at Jan. 28, 2012	$ 460,246	$ (85,941)	$ 161	$ 442	$ (126,433)	$ 248,475
Balance (in Shares) at Jan. 28, 2012	37,070,578	(4,192,312)
Unrealized gain (loss) on marketable securities			240			240
Currency translation adjustments				247		247
Stock-based compensation expense	10,595					10,595
Grants of restricted stock awards (in Shares)	10,980
Tax effect related to share awards	(345)					(345)
Net proceeds from common stock issued under share plans	4,574					4,574
Net proceeds from common stock issued under share plans (in Shares)	1,152,799
Net loss					(101,768)	(101,768)
Balance at Feb. 02, 2013	475,070	(85,941)	401	689	(228,201)	162,018
Balance (in Shares) at Feb. 02, 2013	38,234,357	(4,192,312)
Unrealized gain (loss) on marketable securities			(252)			(252)
Currency translation adjustments				(187)		(187)
Stock-based compensation expense	6,814					6,814
Tax effect related to share awards	682					682
Net proceeds from common stock issued under share plans	2,622					2,622
Net proceeds from common stock issued under share plans (in Shares)	849,604
Repurchase of common stock		(2,257)				(2,257)
Repurchase of common stock (in Shares)		(466,831)
Net loss					(11,049)	(11,049)
Balance at Feb. 01, 2014	485,188	(88,198)	149	502	(239,250)	158,391
Balance (in Shares) at Feb. 01, 2014	39,083,961	(4,659,143)
Unrealized gain (loss) on marketable securities			(176)			(176)
Currency translation adjustments				(1,586)		(1,586)
Stock-based compensation expense	6,279					6,279
Tax effect related to share awards	(231)					(231)
Net proceeds from common stock issued under share plans	2,314					2,314
Net proceeds from common stock issued under share plans (in Shares)	889,728
Net loss					(21,701)	(21,701)
Balance at Jan. 31, 2015	$ 493,550	$ (88,198)	$ (27)	$ (1,084)	$ (260,951)	$ 143,290
Balance (in Shares) at Jan. 31, 2015	39,973,689	(4,659,143)