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Bank Loan (Details) - USD ($)
12 Months Ended
Aug. 25, 2017
Mar. 02, 2015
Feb. 28, 2014
Jun. 30, 2017
Jun. 30, 2016
Line of Credit Facility          
Line of Credit Facility, Revolving Loan Commitment, Accordion Feature   $ 50,000,000      
Line of credit, expiration date   Mar. 02, 2020      
Short-term borrowings under revolving credit facility       $ 27,621,000 $ 109,000
Revolving Credit Facility          
Line of Credit Facility          
Line of credit, current borrowing capacity       55,600,000  
Short-term borrowings under revolving credit facility       27,621,000  
Line of credit, remaining borrowing capacity       $ 27,900,000  
Debt, weighted average interest rate       3.02%  
Letter of Credit          
Line of Credit Facility          
Long-term borrowings under revolving credit facility       $ 100,000  
Loan and Security Agreement [Member] | Revolving Credit Facility | Minimum          
Line of Credit Facility          
Line of Credit Facility, Commitment Fee Percentage       0.25%  
Loan and Security Agreement [Member] | Revolving Credit Facility | Maximum          
Line of Credit Facility          
Line of Credit Facility, Commitment Fee Percentage       0.375%  
Loan and Security Agreement [Member] | Option One | Revolving Credit Facility          
Line of Credit Facility          
Description of variable rate basis   Prime Rate      
Loan and Security Agreement [Member] | Option One | Revolving Credit Facility | Minimum          
Line of Credit Facility          
Basis spread on variable rate   (0.25%)      
Loan and Security Agreement [Member] | Option One | Revolving Credit Facility | Maximum          
Line of Credit Facility          
Basis spread on variable rate   0.50%      
Loan and Security Agreement [Member] | Option Two | Revolving Credit Facility          
Line of Credit Facility          
Description of variable rate basis     LIBOR Rate    
Loan and Security Agreement [Member] | Option Two | Revolving Credit Facility | Minimum          
Line of Credit Facility          
Basis spread on variable rate   1.25%      
Loan and Security Agreement [Member] | Option Two | Revolving Credit Facility | Maximum          
Line of Credit Facility          
Basis spread on variable rate   2.00%      
JP Morgan and SunTrust [Member] | Loan and Security Agreement [Member] | Revolving Credit Facility          
Line of Credit Facility          
Line of credit, maximum borrowing capacity       $ 75,000,000.0  
JP Morgan and SunTrust [Member] | Loan and Security Agreement [Member] | Letter of Credit          
Line of Credit Facility          
Line of credit, maximum borrowing capacity   $ 30,000,000      
JP Morgan Chase [Member] | Loan and Security Agreement [Member] | Swing Line Loans          
Line of Credit Facility          
Line of credit, maximum borrowing capacity   $ 15,000,000      
Subsequent Event | Prime Rate | Loan and Security Agreement [Member] | Minimum          
Line of Credit Facility          
Line of credit, description of interest rate PRIME - 0.25%        
Subsequent Event | Prime Rate | Loan and Security Agreement [Member] | Maximum          
Line of Credit Facility          
Line of credit, description of interest rate PRIME + 0.50%        
Subsequent Event | London Interbank Offered Rate (LIBOR) | Loan and Security Agreement [Member] | Minimum          
Line of Credit Facility          
Line of credit, description of interest rate Adjusted LIBO Rate + 1.25%        
Subsequent Event | London Interbank Offered Rate (LIBOR) | Loan and Security Agreement [Member] | Maximum          
Line of Credit Facility          
Line of credit, description of interest rate Adjusted LIBO Rate + 2.00%