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Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
6 Months Ended 12 Months Ended
Aug. 03, 2019
Aug. 04, 2018
Feb. 02, 2019
Number of shares      
Options granted 0 153,888  
Employee Stock Plan, 2006 Plan and 2016 Plan      
Number of shares      
Outstanding options at beginning of year 957,400    
Options expired and canceled (92,592)    
Outstanding options at end of quarter 864,808   957,400
Options exercisable at end of quarter 854,808    
Weighted-average exercise price per option      
Outstanding options at beginning of year $ 4.50    
Options expired and canceled 2.50    
Outstanding options at end of quarter 4.71   $ 4.50
Options exercisable at end of quarter $ 4.74    
Weighted-average remaining contractual term      
Outstanding options 3 years 7 months 6 days   5 years 1 month 6 days
Options exercisable at end of quarter 3 years 7 months 6 days    
Aggregate Intrinsic Value      
Outstanding options at beginning of year $ 16,878    
Outstanding options at end of quarter     $ 16,878