Condensed Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Warrant [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss) [Member]
Total Shareholders' Equity period beginning at Jan. 31, 2009	$ 99,472,000	$ 337,000	$ 138,000	$ 286,380,000	$ (187,383,000)
Common Stock, Shares, Outstanding period beginning at Jan. 31, 2009		33,690,266
Net loss	(41,998,000)				(41,998,000)	(41,998,000)
Net loss	(14,698,000)
Issuance of Stock and Warrants for Services or Claims	533,000		533,000
Common stock issuances pursuant to equity compensation plans, Shares		604,637
Common stock issuances pursuant to equity compensation plans, Value	729,000	6,000	0	723,000	0
stock purchase warrants forfeited			(34,000)	34,000
Share-based compensation		0
Share-based compensation	3,205,000	0	0	3,205,000	0
Stock Repurchased During Period, Shares		(1,622,168)
Stock Repurchased During Period, Value	(937,000)	(16,000)	0	(921,000)	0
Preferred Stock Redemption Discount	27,362,000			27,362,000
Preferred Stock, Accretion of Redemption Discount	(62,000)			(62,000)
Total Shareholders' Equity period end at Jan. 30, 2010	88,304,000	327,000	637,000	316,721,000	(229,381,000)
Common Stock, Shares, Outstanding period end at Jan. 30, 2010		32,672,735
Net loss	(25,868,000)
Net loss	(25,868,000)				(25,868,000)	(25,868,000)
Common stock issuances pursuant to equity compensation plans, Shares		208,953
Common stock issuances pursuant to equity compensation plans, Value	357,000	2,000	0	355,000	0
stock purchase warrants forfeited			(35,000)	35,000
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited		0
Share-based compensation		0
Share-based compensation	3,350,000	0	0	3,350,000	0
Common stock issuances - equity offerings, Shares		4,900,000
Common stock issuances - equity offerings, Value	17,009,000	49,000	0	16,960,000	0
Preferred Stock Redemption Discount	0
Preferred Stock, Accretion of Redemption Discount	0
Total Shareholders' Equity period end at Jan. 29, 2011	83,152,000	378,000	602,000	337,421,000	(255,249,000)
Common Stock, Shares, Outstanding period end at Jan. 29, 2011	37,781,688	37,781,688
Net loss	(48,064,000)
Net loss	(48,064,000)					(48,064)
Common stock issuances pursuant to equity compensation plans, Shares		601,362
Common stock issuances pursuant to equity compensation plans, Value	1,828,000	6,000	0	1,822,000	0
stock purchase warrants forfeited			(35,000)	35,000
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited		0
Share-based compensation		0
Share-based compensation	5,007,000	0	0	5,007,000	0
Common stock issuances - equity offerings, Shares		9,487,500
Common stock issuances - equity offerings, Value	55,500,000	95,000	0	55,405,000	0
Common stock issuances - NBCU, Shares		689,655
Common stock issuances - NBCU, Value	4,166,000	7,000	0	4,159,000	0
Preferred Stock Redemption Discount	0
Preferred Stock, Accretion of Redemption Discount	0
Total Shareholders' Equity period end at Jan. 28, 2012	$ 101,589,000	$ 486,000	$ 567,000	$ 403,849,000	$ (303,313,000)
Common Stock, Shares, Outstanding period end at Jan. 28, 2012	48,560,205	48,560,205