Senior Revolving Credit Facility, Secured Convertible Notes, Convertible Preferred Stock, and Common Stock Warrants (Details 1) (USD $)	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Debt Instrument [Line Items]
Debt conversion, common stock issued			3,111,111
Debt conversion, write-off of unamortized debt discount and deferred financing costs	$ 0	$ 0	$ 2,083,000
Debt conversion, write-off of accrued interest forfeited by the holder			1,000,000
Debt converstion, converstion inducement	0	0	700,000
Conversions of convertible preferred stock into common stock	0	0	1,611,000
Shares issued due to exercise of warrants			1,160,715
Proceeds from warrants exercised			4,300,000
Warrant, shares expired unredeemed			4,931,401
Convertible Debt [Member] | Secured Convertible Notes [Member]
Debt Instrument [Line Items]
Convertible debt			4,700,000
Debt conversion, write-off of unamortized debt discount and deferred financing costs			2,083,000
Discount amortization period			7 years
Yield to maturity			27.10%
Interest Expense [Member]
Debt Instrument [Line Items]
Debt conversion, write-off of unamortized debt discount and deferred financing costs			2,083,000
Debt converstion, loss on embedded derivative			100,000
Interest Expense [Member] | Convertible Debt [Member] | Secured Convertible Notes [Member]
Debt Instrument [Line Items]
Amortization of debt discount			$ 100,000
Common Stock Class A [Member]
Debt Instrument [Line Items]
Conversions of convertible preferred stock into common stock (in shares)			537,000