Stock Options by Range of Exercise Prices (Detail)	3 Months Ended
	Sep. 30, 2015 $ / shares shares
Employee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding | shares	97,500
Options Outstanding, Weighted average remaining contractual life	8 years 4 months 24 days
Options Outstanding, weighted average exercise price	$ 5.46
Options exercisable, Number exercisable | shares	29,500
Options exercisable, Weighted average exercise price	$ 5.33
Employee 2012 Stock Option Plan [Member] | Exercise price range $ 4.29 - $ 6.31 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	4.29
Range of exercise prices, upper limit	$ 6.31
Options Outstanding, Number outstanding | shares	97,500
Options Outstanding, Weighted average remaining contractual life	8 years 4 months 24 days
Options Outstanding, weighted average exercise price	$ 5.46
Options exercisable, Number exercisable | shares	29,500
Options exercisable, Weighted average exercise price	$ 5.33
NonEmployee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding | shares	35,000
Options Outstanding, Weighted average remaining contractual life	8 years 3 months 18 days
Options Outstanding, weighted average exercise price	$ 4.73
Options exercisable, Number exercisable | shares	17,000
Options exercisable, Weighted average exercise price	$ 4.82
NonEmployee 2012 Stock Option Plan [Member] | Exercise price range $4.37- $ 4.88 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	4.37
Range of exercise prices, upper limit	$ 4.88
Options Outstanding, Number outstanding | shares	35,000
Options Outstanding, Weighted average remaining contractual life	8 years 3 months 18 days
Options Outstanding, weighted average exercise price	$ 4.73
Options exercisable, Number exercisable | shares	17,000
Options exercisable, Weighted average exercise price	$ 4.82
2002 Employee Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding | shares	208,500
Options Outstanding, Weighted average remaining contractual life	9 months 18 days
Options Outstanding, weighted average exercise price	$ 6.86
2002 Employee Stock Option Plan [Member] | Exercise price range $ 5.22 - $ 6.62 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	5.22
Range of exercise prices, upper limit	$ 6.62
Options Outstanding, Number outstanding | shares	171,000
Options Outstanding, Weighted average remaining contractual life	10 months 24 days
Options Outstanding, weighted average exercise price	$ 5.92
2002 Employee Stock Option Plan [Member] | Exercise price range $11.16 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 11.16
Options Outstanding, Number outstanding | shares	37,500
Options Outstanding, Weighted average remaining contractual life	6 months
Options Outstanding, weighted average exercise price	$ 11.16