Stock Options (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2017	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	112,500
Granted	5,000	15,000
Terminated/Lapsed	(11,400)	(15,000)
Exercised	(35,500)	0
Outstanding, end of period	70,600	112,500	112,500
Exercisable, end of period	38,700	55,700
Weighted average fair value at grant date of options granted	$ 5.22	$ 3.86
Total intrinsic value of options exercised	$ 152,000
Total intrinsic value of options outstanding	252,000	$ 93,000
Total intrinsic value of options exercisable	$ 132,000	$ 43,000
Outstanding, beginning of year, weighted average exercise price	$ 5.54	$ 5.3
Granted, weighted average exercise price	8.15	6.05
Terminated/Lapsed, weighted average exercise price	6.10	4.29
Exercised, weighted average exercise price	5.13	0
Outstanding, end of period, weighted average exercise price	5.84	5.54	$ 5.3
Exercisable, end of period, weighted average exercise price	$ 5.98	$ 5.59
NonEmployee 2012 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of year	35,000	35,000
Granted	0	0
Terminated/Lapsed	0	0
Exercised	(20,800)	0
Outstanding, end of period	14,200	35,000	35,000
Exercisable, end of period	5,200	19,000
Total intrinsic value of options exercised	$ 96,000
Total intrinsic value of options outstanding	67,000	$ 57,000
Total intrinsic value of options exercisable	$ 24,000	$ 30,000
Outstanding, beginning of year, weighted average exercise price	$ 4.73	$ 4.73
Granted, weighted average exercise price	0	0
Terminated/Lapsed, weighted average exercise price	0	0
Exercised, weighted average exercise price	4.76	0
Outstanding, end of period, weighted average exercise price	4.69	4.73	$ 4.73
Exercisable, end of period, weighted average exercise price	$ 4.76	$ 4.77
Employee Stock Option Plan 2002 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of year	5,000	102,500	208,500
Granted		0	0
Terminated/Lapsed		(10,500)	(38,500)
Exercised		(87,000)	(67,500)
Outstanding, end of period		5,000	102,500
Exercisable, end of period		5,000	102,500
Weighted average fair value at grant date of options granted		$ 0	$ 0
Total intrinsic value of options exercised		$ 289,000	$ 42,000
Total intrinsic value of options outstanding		20,000	40,000
Total intrinsic value of options exercisable		$ 20,000	$ 40,000
Outstanding, beginning of year, weighted average exercise price	$ 5.35	$ 6.04	$ 6.86
Terminated/Lapsed, weighted average exercise price		6.02	11.03
Exercised, weighted average exercise price		6.08	5.73
Outstanding, end of period, weighted average exercise price		5.35	6.04
Exercisable, end of period, weighted average exercise price		$ 5.35	$ 6.04