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Stockholders’ Equity - Stock Options And Related Valuation Assumptions (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Aug. 17, 2017
Apr. 05, 2016
Jul. 16, 2013
Stock-Based Compensation            
Per share purchase price       $ 4,000 $ 16.89  
Stock Options            
Stock-Based Compensation            
Vesting period 3 years          
Stock-based compensation expense recognized (in dollars) $ 1.2 $ 1.0 $ 1.1      
Assumptions            
Expected Volatility, Minimum (as a percent) 39.80% 39.40% 29.80%      
Expected Volatility, Maximum (as a percent) 58.90% 42.60% 29.90%      
Risk-Free Interest Rate, Minimum (as a percent) 1.90% 1.00% 1.30%      
Risk-Free Interest Rate, Maximum (as a percent) 2.30% 1.80% 1.60%      
Stock Options | Minimum            
Stock-Based Compensation            
Expiration period 7 years          
Assumptions            
Expected Life 4 years 9 months 18 days 3 years 6 months 4 years 7 months 6 days      
Stock Options | Maximum            
Stock-Based Compensation            
Expiration period 10 years          
Assumptions            
Expected Life 4 years 10 months 24 days 4 years 9 months 18 days 4 years 10 months 24 days      
Estimated Forfeiture Rate (as a percent) 10.00% 10.00% 10.00%      
2013 Plan            
Stock-Based Compensation            
Number of shares of common stock authorized that were previously reserved but unissued under 2006 Plan           1,200,000
Future grants of common stock authorized           447,487