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Borrowings Under Revolving Credit Facility (Details) - Revolving Credit Facility
$ in Millions
Oct. 19, 2017
USD ($)
Jun. 28, 2020
USD ($)
Mar. 29, 2020
USD ($)
Oct. 18, 2017
USD ($)
Credit Facility        
Maximum borrowing capacity $ 75.0     $ 35.0
Maximum aggregate commitment amount $ 125.0      
Borrowing base as a percent of eligible receivables 85.00%      
Interest rate (as a percent)   1.68%    
Increase of applicable rate upon event of default (as a percent) 2.00%      
Fee commitment (as a percent) 0.25%      
Outstanding principal balance   $ 25.3 $ 25.6  
Available borrowing capacity   $ 49.7 $ 49.4  
Minimum        
Credit Facility        
Inventory age 181 days      
Maximum        
Credit Facility        
Maximum borrowing availability amount required $ 10.0      
Inventory age 181 days      
Amount included in formula to determine borrowing base $ 4.0      
Base rate        
Credit Facility        
Interest rate spread on variable rate basis upon event of default (as a percent) 0.50%      
Eurodollar rate        
Credit Facility        
Value from which Eurodollar Reserve Percentage is subtracted 1.00      
Interest rate spread on variable rate when average availability is greater or equal to $15 million 1.50%      
Average availability threshold $ 15.0      
Interest rate spread on variable rate when average availability otherwise 1.75%      
Interest rate spread on variable rate basis upon event of default (as a percent) 1.75%      
Standby letters of credit        
Credit Facility        
Maximum borrowing capacity $ 5.0      
Swingline loan        
Credit Facility        
Maximum borrowing capacity $ 12.5