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Share-Based Compensation - Stock Option Activity Under Stock Option Plan (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 01, 2020
Feb. 03, 2018
Stock options    
Beginning balance (in shares) 1,736,250  
Granted (in shares) 733,500  
Exercised (in shares) (181,001)  
Forfeited (in shares) (120,967)  
Expired (in shares) (174,595)  
Ending balance (in shares) 1,993,187  
Exercisable ending balance (in shares) 974,670  
Grant date weighted average exercise price    
Grant date weighted average exercise price, Beginning balance (in dollars per share) $ 9.47  
Grant date weighted average exercise price, Granted (in dollars per share) 10.60  
Grant date weighted average exercise price, Exercised (in dollars per share) 8.78  
Grant date weighted average exercise price, Forfeited (in dollars per share) 10.11  
Grant date weighted average exercise price, Expired (in dollars per share) 14.19  
Grant date weighted average exercise price, Ending balance (in dollars per share) 9.50  
Grant date weighted average exercise price, Exercisable ending balance (in dollars per share) $ 8.85  
Average remaining contractual life    
Outstanding at end of period (in years) 7 years 2 months  
Exercisable ending balance (in years) 5 years 5 months  
Aggregate intrinsic value    
Outstanding at end of period $ 1,463  
Exercisable ending balance $ 1,361  
Class A Common Stock    
Stock options    
Exercised (in shares)   (308,000)
Aggregate intrinsic value    
Market value per share (in dollars per share) $ 8.50