Consolidated Statement of Shareholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit
Common Stock, Shares, Outstanding period beginning at Jan. 31, 2015		56,448,663
Total Shareholders' Equity period beginning at Jan. 31, 2015	$ 84,528,000	$ 564,000	$ 418,846,000	$ (334,882,000)
Net income (loss)	(12,284,000)	$ 0	0	(12,284,000)
Common stock issuances pursuant to equity compensation plans, Shares		721,582
Common stock issuances pursuant to equity compensation plans, Value	2,460,000	$ 7,000	2,453,000	0
Share-based payment compensation, Shares		0
Share-based payment compensation, Value	2,275,000	$ 0	2,275,000	0
Common Stock, Shares, Outstanding period end at Jan. 30, 2016		57,170,245
Total Shareholders' Equity period end at Jan. 30, 2016	76,979,000	$ 571,000	423,574,000	(347,166,000)
Net income (loss)	(8,745,000)	$ 0	0	(8,745,000)
Common stock issuances pursuant to equity compensation plans, Shares		423,338
Common stock issuances pursuant to equity compensation plans, Value	(46,000)	$ 5,000	(51,000)	0
Share-based payment compensation, Shares		0
Share-based payment compensation, Value	1,946,000	$ 0	1,946,000	0
Common stock and warrant issuance, Shares		7,598,731
Common stock and warrant issuance, Value	$ 11,569,000	$ 76,000	11,493,000	0
Common Stock, Shares, Outstanding period end at Jan. 28, 2017	65,192,314	65,192,314.000
Total Shareholders' Equity period end at Jan. 28, 2017	$ 81,703,000	$ 652,000	436,962,000	(355,911,000)
Net income (loss)	143,000	$ 0	0	143,000
Repurchases of common stock, Shares		(4,400,000)
Repurchases of common stock, Value	(5,055,000)	$ (44,000)	(5,011,000)	0
Common stock issuances pursuant to equity compensation plans, Shares		389,871
Common stock issuances pursuant to equity compensation plans, Value	34,000	$ 4,000	30,000	0
Share-based payment compensation, Shares		0
Share-based payment compensation, Value	2,888,000	$ 0	2,888,000	0
Common stock and warrant issuance, Shares		4,108,273
Common stock and warrant issuance, Value	$ 4,283,000	$ 41,000	4,242,000	0
Common Stock, Shares, Outstanding period end at Feb. 03, 2018	65,290,458	65,290,458.000
Total Shareholders' Equity period end at Feb. 03, 2018	$ 83,996,000	$ 653,000	$ 439,111,000	$ (355,768,000)