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Capitalization - Activity In Unvested Common Shares (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Feb. 01, 2014
Apr. 05, 2016
Stock-Based Compensation          
Closing share price (in dollars per share)         $ 16.89
Performance-Based Equity Awards          
Stock-Based Compensation          
Target growth rate (as a percent) 10.00%        
Target share price for fiscal year 2017 (in dollars per share) $ 18.58        
Target share price for fiscal year 2018 (in dollars per share) 20.44        
Target share price for fiscal year ending in 2019 (in dollars per share) $ 22.48        
Award vesting percentage 33.00%        
Restricted Stock and Performance Stock Units          
Stock-Based Compensation          
Vesting period 3 years        
Compensation expense (in dollars) $ 1,350 $ 1,100 $ 400    
Number of Shares          
Unvested stock at the beginning of the period (in shares) 196,500 76,936 87,000    
Granted (in shares) 31,500 166,000 51,576    
Vested (in shares) (65,831) (27,435)   (44,640)  
Forfeited (in shares) (5,000) (19,001) (17,000)    
Unvested stock at the end of the period (in shares) 157,169 196,500 76,936 87,000  
Weighted Average Grant-Date Fair Value          
Unvested stock at the beginning of the period (in dollars per share) $ 21.67 $ 13.02 $ 5.70    
Granted (in dollars per share) 10.08 22.71 17.22    
Vested (in dollars per share) 21.10 15.74   $ 5.55  
Forfeited (in dollars per share) 17.81 4.27 7.92    
Unvested stock at the end of the period (in dollars per share) $ 19.71 $ 21.67 $ 13.02 $ 5.70  
Unrecognized stock-based compensation          
Unrecognized stock-based compensation expense (in dollars) $ 1,900        
Weighted average period for recognition of unrecognized stock-based compensation expense 1 year 5 months 19 days