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LONG-TERM DEBT (Details)
$ in Thousands
6 Months Ended
Oct. 30, 2017
USD ($)
Sep. 23, 2017
USD ($)
Mar. 25, 2017
USD ($)
Debt Instrument [Line Items]      
Current portion of loan outstanding   $ 1,429 $ 1,429
Allowable leverage ratio   3.00 2.75
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity   $ 30,000  
Debt Instrument, Interest Rate, Stated Percentage   1.20%  
Amount outstanding   $ 21,700  
Revolving Credit Facility [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Interest rate for period   3.20%  
Revolving Credit Facility [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Interest rate for period   3.30%  
Subsequent Event [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 30,000    
Principal amount of loan $ 15,000    
Allowable leverage ratio 3.0    
Loans Payable [Member]      
Debt Instrument [Line Items]      
Principal amount of loan   $ 10,000  
Loan outstanding   8,000  
Current portion of loan outstanding   1,400  
Monthly principal payments   100  
Annual payments   1,400  
Amount due in 2022   3,000  
Loans Payable [Member] | Subsequent Event [Member]      
Debt Instrument [Line Items]      
Maturity date Oct. 29, 2021    
Amount due in 2022 $ 4,300    
Term loan repayment per month 200    
Borrowings for Business Acquisitions [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity   $ 30,000 $ 15,000
Borrowings for Business Acquisitions [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 20,000