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Shareholders' Equity - Restricted Stock Awards and Restricted Stock Units - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Aug. 02, 2014
Aug. 03, 2013
Aug. 02, 2014
Aug. 03, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense     $ 837,000 $ 1,716,000
Compensation cost related to nonvested stock options, restricted stock awards and restricted stock units not yet recognized 1,800,000   1,800,000  
Stock based compensation expense, weighted average period 1 year 10 months 7 days      
Restricted Stock [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant-date fair Value granted (in dollars per share)     $ 2.86 $ 1.77
Fair value of awards vested     1,200,000 1,100,000
Granted, Shares     60,000  
Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant-date fair Value granted (in dollars per share)     $ 2.25 $ 3.47
Fair value of awards vested     300,000 400,000
Granted, Shares     150,000  
Performance Plan [Member] | Restricted Stock [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period of restricted stock     4 years  
Restricted stock award vesting percentage per year     25.00%  
Performance Plan [Member] | Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock award vesting percentage per year     100.00%  
Stock-based compensation expense $ 300,000 $ 700,000 $ 800,000 $ 1,700,000
Performance -based restricted stock awards [Member] | Performance Shares [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted, Shares       675,000
Performance -based restricted stock awards [Member] | Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant-date fair Value granted (in dollars per share)     $ 2.86 $ 2.51