Stock Options by Range of Exercise Prices (Detail) (USD $)	3 Months Ended
	Sep. 30, 2014
Employee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding	68,500
Options Outstanding, Weighted average remaining contractual life	9 years 1 month 6 days
Options Outstanding, weighted average exercise price	$ 5.86
Options exercisable, Number exercisable	18,700
Options exercisable, Weighted average exercise price	$ 5.65
Employee 2012 Stock Option Plan [Member] | Exercise price range $ 4.88 - $ 6.31 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.88
Range of exercise prices, upper limit	$ 6.31
Options Outstanding, Number outstanding	68,500
Options Outstanding, Weighted average remaining contractual life	9 years 1 month 6 days
Options Outstanding, weighted average exercise price	$ 5.86
Options exercisable, Number exercisable	18,700
Options exercisable, Weighted average exercise price	$ 5.65
NonEmployee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding	25,000
Options Outstanding, Weighted average remaining contractual life	8 years 10 months 24 days
Options Outstanding, weighted average exercise price	$ 4.88
Options exercisable, Number exercisable	10,000
Options exercisable, Weighted average exercise price	$ 4.88
NonEmployee 2012 Stock Option Plan [Member] | Exercise price range $ 4.88 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.88
Options Outstanding, Number outstanding	25,000
Options Outstanding, Weighted average remaining contractual life	8 years 10 months 24 days
Options Outstanding, weighted average exercise price	$ 4.88
Options exercisable, Number exercisable	10,000
Options exercisable, Weighted average exercise price	$ 4.88
2002 Employee Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding	264,750
Options Outstanding, Weighted average remaining contractual life	1 year 7 months 6 days
Options Outstanding, weighted average exercise price	$ 6.51
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	227,250
Options Outstanding, Weighted average remaining contractual life	1 year 7 months 6 days
Options Outstanding, weighted average exercise price	$ 5.75
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	37,500
Options Outstanding, Weighted average remaining contractual life	1 year 6 months
Options Outstanding, weighted average exercise price	$ 11.16