Shareholders' Equity (Details Textual) (USD $)	6 Months Ended		12 Months Ended	6 Months Ended										3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012	Jul. 28, 2012 Stock Options [Member]	Jul. 28, 2012 Restricted Stock [Member]	Jul. 30, 2011 Restricted Stock [Member]	Jul. 28, 2012 Restricted Stock Units (RSUs) [Member]	Jul. 28, 2012 Maximum [Member]	Jul. 28, 2012 Minimum [Member]	Jul. 28, 2012 Performance Plan [Member]	Jul. 28, 2012 Performance Plan [Member] Restricted Stock [Member]	Jul. 30, 2011 Performance Plan [Member] Restricted Stock [Member]	Jul. 28, 2012 Performance Plan [Member] Performance Shares [Member]	Jul. 28, 2012 Performance Plan [Member] Restricted Stock Units (RSUs) [Member]	Jul. 30, 2011 Performance Plan [Member] Restricted Stock Units (RSUs) [Member]	Jul. 28, 2012 Performance Plan [Member] Restricted Stock Units (RSUs) [Member]	Jul. 30, 2011 Performance Plan [Member] Restricted Stock Units (RSUs) [Member]	Jul. 28, 2012 Series B Preferred Stock [Member]
Shareholders' Equity (Textual) [Abstract]
Exercise price of series B preferred shares																		1.75
Period in which stock option expires under condition one								10 years	7 years
Maximum number of shares of the Company's common stock that was available for award grants under the Performance Plan										2,100,000
Termination date of the Performance Plan										Mar. 22, 2015
Vesting period of restricted stock								4 years	3 years		4 years
Stock option expiration conditions				Expire in seven to ten years or three months after termination of employment with the Company.
Time-based restriction as to vesting											Four years with 25% of the grant vesting each year on the anniversary of the grant date.					Awards generally vest 100% on the first anniversary of the grant date.
Restricted stock award vesting percentage per year											25.00%
Shares which only vest upon the achievement of certain performance-based financial targets							125,000				1,495,782		675,000
Weighted-average grant-date fair value granted							$ 1.57				$ 1.76	$ 3.53
Fair value of awards vested					$ 500,000	$ 900,000										$ 1,770,000	$ 0
Restricted stock units vesting percentage per year																100.00%
Stock-based compensation expense	1,466,000	1,736,000												600,000	700,000	1,400,000	1,700,000
Compensation cost related to nonvested stock options, restricted stock awards and restricted stock units not yet recognized														4,300,000		4,300,000
Stock-based compensation expense is expected to be recognized over a weighted-average period					3 years 6 months											2 years 7 months 6 days
Shareholders' Equity (Additional Textual) [Abstract]
Common Stock issued to landlords			900,000
Common Stock issued to landlords, fair value			1,600,000
Right to purchase common stock	13,500,000
Stock-based awards vesting period	1 year
Period in which stock option expires under condition	3 months
Weighted-average grant-date fair value per share of options granted	$ 1.71	$ 1.96
Intrinsic value of stock options exercised	$ 0	$ 100,000
Percentage of discount in purchasing common stock from fair market value under ESPP	10.00%
Purchasing period of stock under ESPP	6 months
Shares issued under ESPP	114,897	95,798
Average price at which shares issued under ESPP	$ 1.58	$ 2.35