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Stock Options (Detail) - USD ($)
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Employee 2012 Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, beginning of year 112,500 78,500
Granted 15,000 44,000
Terminated/Lapsed (15,000) (10,000)
Exercised 0 0
Outstanding, end of year 112,500 112,500
Exercisable, end of year 55,700 27,500
Weighted average fair value at grant date of options granted $ 3.86 $ 2.82
Total intrinsic value of options exercised
Total intrinsic value of options outstanding 93,000 73,000
Total intrinsic value of options exercisable $ 43,000 $ 18,000
Outstanding, beginning of year, weighted average exercise price $ 5.3 $ 5.73
Granted, weighted average exercise price 6.05 4.43
Terminated/Lapsed, weighted average exercise price 4.29 4.88
Exercised, weighted average exercise price 0 0
Outstanding, end of period, weighted average exercise price 5.54 5.3
Exercisable, end of period, weighted average exercise price $ 5.59 $ 5.26
NonEmployee 2012 Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, beginning of year 35,000 25,000
Granted 0 10,000
Terminated/Lapsed 0 0
Exercised 0 0
Outstanding, end of year 35,000 35,000
Exercisable, end of year 19,000 12,000
Weighted average fair value at grant date of options granted $ 2.86
Total intrinsic value of options exercised
Total intrinsic value of options outstanding 57,000 35,000
Total intrinsic value of options exercisable $ 30,000 $ 11,000
Outstanding, beginning of year, weighted average exercise price $ 4.73 $ 4.88
Granted, weighted average exercise price 0 4.37
Terminated/Lapsed, weighted average exercise price 0 0
Exercised, weighted average exercise price 0 0
Outstanding, end of period, weighted average exercise price 4.73 4.73
Exercisable, end of period, weighted average exercise price $ 4.77 $ 4.80
Employee Stock Option Plan 2002 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, beginning of year 208,500 265,750
Granted 0 0
Terminated/Lapsed (38,500) (57,250)
Exercised (67,500) 0
Outstanding, end of year 102,500 208,500
Exercisable, end of year 102,500 208,500
Weighted average fair value at grant date of options granted
Total intrinsic value of options exercised $ 42,000
Total intrinsic value of options outstanding 40,000 6,000
Total intrinsic value of options exercisable $ 40,000 $ 6,000
Outstanding, beginning of year, weighted average exercise price $ 6.86 $ 6.51
Granted, weighted average exercise price 0 0
Terminated/Lapsed, weighted average exercise price 11.03 5.24
Exercised, weighted average exercise price 5.73 0
Outstanding, end of period, weighted average exercise price 6.04 6.86
Exercisable, end of period, weighted average exercise price $ 6.04 $ 6.86