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9. LONG-TERM DEBT (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2017
Dec. 01, 2014
Oct. 01, 2010
9. LONG-TERM DEBT (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)   $ 75.0 $ 70.0
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars) $ 70.2    
London Interbank Offered Rate (LIBOR) [Member]      
9. LONG-TERM DEBT (Details) [Line Items]      
Line of Credit Facility, Interest Rate at Period End 2.49%    
Debt Instrument, Basis Spread on Variable Rate 1.25%    
Prime Rate [Member]      
9. LONG-TERM DEBT (Details) [Line Items]      
Line of Credit Facility, Interest Rate at Period End 4.00%    
Debt Instrument, Basis Spread on Variable Rate 0.25%