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Stock-Based Compensation - Narrative (Detail) - USD ($)
6 Months Ended
Oct. 01, 2019
Jul. 01, 2019
Apr. 01, 2019
Oct. 01, 2018
Nov. 03, 2019
Oct. 28, 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         886,298    
Performance Based Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Remaining unrecognized compensation cost         $ 1,300,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized         2 years 4 months 24 days    
Fair value of units expected to vest         $ 1,300,000    
Common Stock Awards [Member] | Director [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares granted 4,519 3,659 2,948 3,600      
Price Per Share $ 15.49 $ 19.21 $ 19.18 $ 23.45      
Time Vested Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Remaining unrecognized compensation cost         $ 790,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized         2 years 9 months 18 days    
Fair value of units expected to vest         $ 682,000    
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         275,000 $ (216,000)  
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         140,000 84,000  
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         $ 52,000 $ 26,000