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Stock-based Compensation (Schedule of stock option activity) (Details) - USD ($)
9 Months Ended 12 Months Ended
Mar. 31, 2016
Jun. 30, 2015
Number of Shares Subject to Options    
Balance, beginning 187,500  
Granted 1,500  
Exercised (12,700)  
Forfeited or expired (3,250)  
Outstanding, ending 173,050 187,500
Vested or expected to vest, end of period 166,673  
Exercisable, end of period 128,750  
Weight Average Exercise Price    
Balance, beginning $ 23.38  
Granted 26.03  
Exercised 18.34  
Forfeited or expired 25.99  
Outstanding, ending 23.72 $ 23.38
Vested or expected to vest, end of period 23.62  
Exercisable, end of period $ 22.87  
Weighted Average Remaining Contractual Term    
Balance, beginning   6 years 3 months 4 days
Granted 9 years 9 months 25 days  
Outstanding, ending 5 years 9 months 29 days  
Vested or expected to vest, end of period 5 years 8 months 12 days  
Exercisable, end of period 4 years 8 months 8 days  
Aggregate Intrinsic Value    
Outstanding end of period $ 311,241  
Vested or expected to vest, end of period 311,241  
Exercisable, end of period $ 311,241