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Bank Loan (Details) - USD ($)
12 Months Ended
Mar. 02, 2015
Feb. 28, 2014
Jun. 30, 2016
Jun. 30, 2015
Line of Credit Facility        
Line of credit, additional borrowing capacity $ 50,000,000      
Line of credit, expiration date Mar. 02, 2020      
Short-term borrowings under revolving credit facility     $ 109,000 $ 78,000
Minimum        
Line of Credit Facility        
Line of credit, commitment fee percent     0.25%  
Maximum        
Line of Credit Facility        
Line of credit, commitment fee percent     0.375%  
Revolving Credit Facility        
Line of Credit Facility        
Line of credit, current borrowing capacity     $ 58,600,000  
Line of credit, remaining borrowing capacity     $ 46,600,000  
Debt, weighted average interest rate     1.64%  
Letter of Credit        
Line of Credit Facility        
Long-term borrowings under revolving credit facility     $ 11,900,000  
JPM Chase Loan Agreement | Option One | Revolving Credit Facility        
Line of Credit Facility        
Description of variable rate basis Prime Rate      
JPM Chase Loan Agreement | Option One | Revolving Credit Facility | Minimum        
Line of Credit Facility        
Basis spread on variable rate (0.25%)      
JPM Chase Loan Agreement | Option One | Revolving Credit Facility | Maximum        
Line of Credit Facility        
Basis spread on variable rate 0.50%      
JPM Chase Loan Agreement | Option Two | Revolving Credit Facility        
Line of Credit Facility        
Description of variable rate basis   LIBOR Rate    
JPM Chase Loan Agreement | Option Two | Revolving Credit Facility | Minimum        
Line of Credit Facility        
Basis spread on variable rate 1.25%      
JPM Chase Loan Agreement | Option Two | Revolving Credit Facility | Maximum        
Line of Credit Facility        
Basis spread on variable rate 2.00%      
JP Morgan and SunTrust | JPM Chase Loan Agreement | Revolving Credit Facility        
Line of Credit Facility        
Line of credit, maximum borrowing capacity $ 75,000,000.0      
JP Morgan and SunTrust | JPM Chase Loan Agreement | Letter of Credit        
Line of Credit Facility        
Line of credit, maximum borrowing capacity 30,000,000      
JP Morgan Chase | JPM Chase Loan Agreement | Swing Line Loans        
Line of Credit Facility        
Line of credit, maximum borrowing capacity $ 15,000,000      
Prime Rate | Minimum        
Line of Credit Facility        
Line of credit, description of interest rate     PRIME - 0.25%  
Prime Rate | Maximum        
Line of Credit Facility        
Line of credit, description of interest rate     PRIME + 0.50%  
London Interbank Offered Rate (LIBOR) | Minimum        
Line of Credit Facility        
Line of credit, description of interest rate     Adjusted LIBO Rate + 1.25%  
London Interbank Offered Rate (LIBOR) | Maximum        
Line of Credit Facility        
Line of credit, description of interest rate     Adjusted LIBO Rate + 2.00%