Stock Options (Detail) - USD ($)	6 Months Ended
	Dec. 31, 2016	Dec. 31, 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	0
Terminated/Lapsed	(400)	(15,000)
Exercised	(1,500)	0
Outstanding, end of period	115,600	97,500
Exercisable, end of period	74,500	53,500
Weighted average fair value at grant date of options granted	26,000
Total intrinsic value of options exercised	$ 9,000
Total intrinsic value of options outstanding	331,000	$ 61,000
Total intrinsic value of options exercisable	$ 218,000	$ 30,000
Outstanding, beginning of year, weighted average exercise price	$ 5.54	$ 5.3
Granted, weighted average exercise price	8.15	0
Terminated/Lapsed, weighted average exercise price	6.31	4.29
Exercised, weighted average exercise price	6.31	0
Outstanding, end of period, weighted average exercise price	5.64	5.46
Exercisable, end of period, weighted average exercise price	$ 5.57	$ 5.54
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	(5,200)	0
Outstanding, end of period	29,800	35,000
Exercisable, end of period	20,800	19,000
Total intrinsic value of options exercised	$ 25,000
Total intrinsic value of options outstanding	112,000	$ 41,000
Total intrinsic value of options exercisable	$ 78,000	$ 21,000
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	4.73	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	102,500	208,500
Granted	0	0
Terminated/Lapsed	(10,500)	(1,000)
Exercised	(52,000)	(67,500)
Outstanding, end of period	40,000	140,000
Exercisable, end of period	40,000	140,000
Total intrinsic value of options exercised	$ 114,000	$ 11,000
Total intrinsic value of options outstanding	113,000	9,000
Total intrinsic value of options exercisable	$ 113,000	$ 9,000
Outstanding, beginning of year, weighted average exercise price	$ 6.04	$ 6.86
Granted, weighted average exercise price	0	0
Terminated/Lapsed, weighted average exercise price	6.02	6.02
Exercised, weighted average exercise price	6.31	5.73
Outstanding, end of period, weighted average exercise price	5.69	7.41
Exercisable, end of period, weighted average exercise price	$ 5.69	$ 7.41