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NOTES PAYABLE AND LONG-TERM DEBT - Narrative (Details) - USD ($)
9 Months Ended
Jan. 21, 2021
Apr. 20, 2020
Aug. 21, 2019
Jun. 29, 2018
Mar. 31, 2021
Jan. 22, 2021
Dec. 28, 2020
Letter of Credit              
Line of Credit Facility [Line Items]              
Amount outstanding         $ 100,000    
Credit Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity       $ 14,000,000.0      
Percentage of eligible accounts receivable considered for borrowing base       80.00%      
Percentage of eligible inventory considered for borrowing base       50.00%      
Borrowing base, monetary benchmark       $ 3,000,000.0      
Basis spread of variable rate       50.00%      
Interest rate         3.00%    
Unused capacity, commitment fee percentage         0.25%    
Remaining borrowing capacity         $ 13,900,000    
Maximum borrowing capacity, option         17,900,000    
Credit Agreement | Working Capital              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity       $ 6,000,000.0      
Remaining borrowing capacity   $ 6,000,000.0     5,900,000    
Credit Agreement | Business Acquisitions              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity       $ 8,000,000.0      
Percentage of portion allocated to acquisition purchase price       75.00%      
Remaining borrowing capacity   8,000,000.0     $ 8,000,000.0    
Credit Agreement | Additional Working Capital              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity       $ 4,000,000      
Credit Agreement | Maximum              
Line of Credit Facility [Line Items]              
Debt cash flow leverage ratio         3.0    
Credit Agreement | Minimum              
Line of Credit Facility [Line Items]              
Debt service coverage ratio         1.15    
Credit Agreement | Term Loan              
Line of Credit Facility [Line Items]              
Maturity period       5 years      
Credit Agreement | Letter of Credit              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity       $ 2,000,000.0      
Credit Agreement | LIBOR              
Line of Credit Facility [Line Items]              
Basis spread of variable rate       2.50%      
Debt instrument, term of variable rate       1 month      
Credit Agreement | LIBOR | Maximum              
Line of Credit Facility [Line Items]              
Basis spread of variable rate       3.00%      
Credit Agreement Amendment              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             $ 18,000,000
Loan Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity     $ 3,200,000        
Interest rate         2.74%    
Interest rate at expiration of advancing period         4.15%    
Loan Agreement | Real Estate              
Line of Credit Facility [Line Items]              
Remaining borrowing capacity     2,000,000.0        
Loan Agreement | Equipment              
Line of Credit Facility [Line Items]              
Remaining borrowing capacity     $ 1,200,000        
Loan Agreement | Term Loan              
Line of Credit Facility [Line Items]              
Maturity period     5 years        
Loan Agreement | LIBOR              
Line of Credit Facility [Line Items]              
Basis spread of variable rate       2.50%      
Debt instrument, term of variable rate       1 month      
Real Estate Loan Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity           $ 900,000  
Maturity period 5 years            
Amortization period 20 years            
Interest rate           4.00%  
Payment Protection Program loan              
Line of Credit Facility [Line Items]              
Debt instrument, face amount   $ 2,200,000          
Payment Protection Program loan | Term Loan              
Line of Credit Facility [Line Items]              
Maturity period   2 years