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Shareholders' Equity - Summary of Service-Based Restricted Stock Awards and Units Activity (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
6 Months Ended
Aug. 03, 2013
Jul. 28, 2012
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Shares Outstanding at February 2, 2013 1,795,943  
Granted, Shares 170,000  
Vested, Shares (461,500)  
Forfeited or expired, Shares (53,416)  
Shares Outstanding at August 3, 2013 1,451,027  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Weighted-Average Grant-Date Fair Value, Outstanding at February 2, 2013 (in dollars per share) $ 2.16  
Weighted-Average Grant-Date Fair Value, Granted (in dollars per share)   $ 1.77
Weighted-Average Grant-Date Fair Value Vested (in dollars per share) $ 2.31  
Weighted-Average Grant-Date Fair Value, Forfeited (in dollars per share) $ 2.37  
Weighted-Average Grant-Date Fair Value, Outstanding at August 3, 2013 (in dollars per share) $ 2.15  
Fair value of awards vested $ 1.1 $ 0.5
Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Shares Outstanding at February 2, 2013 125,000  
Granted, Shares 122,480  
Vested, Shares (125,000)  
Forfeited or expired, Shares     
Shares Outstanding at August 3, 2013 122,480  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Weighted-Average Grant-Date Fair Value, Outstanding at February 2, 2013 (in dollars per share) $ 1.57  
Weighted-Average Grant-Date Fair Value, Granted (in dollars per share) $ 3.47 $ 1.57
Weighted-Average Grant-Date Fair Value Vested (in dollars per share) $ 1.57  
Weighted-Average Grant-Date Fair Value, Forfeited (in dollars per share)     
Weighted-Average Grant-Date Fair Value, Outstanding at August 3, 2013 (in dollars per share) $ 3.47  
Fair value of awards vested $ 0.4 $ 0.2