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Stock-Based Compensation - Narrative (Detail) - USD ($)
3 Months Ended
Oct. 01, 2018
Aug. 04, 2019
Jul. 29, 2018
Sep. 16, 2015
2015 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock authorized for issuance       1,200,000
Number of shares available for future equity based grants   913,648    
Performance Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Remaining unrecognized compensation cost   $ 1,400,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized   2 years 8 months 12 days    
Fair value of units expected to vest   $ 1,500,000    
Common Stock Awards [Member] | Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted 3,659      
Price Per Share $ 19.21      
Time Vested Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Remaining unrecognized compensation cost   $ 467,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized   3 years 3 months 18 days    
Fair value of units expected to vest   $ 435,000    
Selling, General and Administrative Expenses [Member] | Performance Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   68,000 $ (506,000)  
Selling, General and Administrative Expenses [Member] | Common Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   70,000    
Selling, General and Administrative Expenses [Member] | Time Vested Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   $ 16,000 $ 5,000