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Long-Term Debt (Detail) - USD ($)
Jun. 30, 2016
Jun. 30, 2015
Debt Instrument [Line Items]    
Total debt $ 4,800,000 $ 10,700,000
Interest rate 1.60% 1.70%
Revolving line of credit [Member]    
Debt Instrument [Line Items]    
Outstanding $ 2,000,000 $ 3,000,000
Interest rate 1.60% 1.70%
Term loans [Member]    
Debt Instrument [Line Items]    
Outstanding $ 2,800,000 $ 7,700,000
Interest rate 1.60% 1.70%