Stock Options by Range of Exercise Prices (Detail) (USD $)	3 Months Ended
	Sep. 30, 2013
Employee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding, end of period, weighted average remaining contractual life	9 years 10 months 24 days
Employee 2012 Stock Option Plan [Member] | Exercise price range $1.62 - $ 4.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 5.00
Range of exercise prices, upper limit	$ 6.00
Options Outstanding, Number outstanding	35,000
Options Outstanding, Weighted average remaining contractual life	9 years 10 months 24 days
Options Outstanding, weighted average exercise price	$ 5.02
Options exercisable, Number exercisable	7,000
Options exercisable, Weighted average exercise price	$ 5.02
NonEmployee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding, end of period, weighted average remaining contractual life	9 years 10 months 24 days
NonEmployee 2012 Stock Option Plan [Member] | Exercise price range $1.62 - $ 4.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.00
Range of exercise prices, upper limit	$ 5.00
Options Outstanding, Number outstanding	25,000
Options Outstanding, Weighted average remaining contractual life	9 years 10 months 24 days
Options Outstanding, weighted average exercise price	$ 4.88
Options exercisable, Number exercisable	5,000
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]
Outstanding, end of period, weighted average remaining contractual life	2 years 4 months 24 days
2002 Employee Stock Option Plan [Member] | Exercise price range $1.62 - $ 4.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 1.62
Range of exercise prices, upper limit	$ 4.00
Options Outstanding, Number outstanding	28,350
Options Outstanding, Weighted average remaining contractual life	6 months
Options Outstanding, weighted average exercise price	$ 1.90
2002 Employee Stock Option Plan [Member] | Exercise price range $4.01 - $ 7.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.01
Range of exercise prices, upper limit	$ 7.50
Options Outstanding, Number outstanding	228,250
Options Outstanding, Weighted average remaining contractual life	2 years 7 months 6 days
Options Outstanding, weighted average exercise price	$ 5.75
2002 Employee Stock Option Plan [Member] | Exercise price range $7.51 - $11.16 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 7.51
Range of exercise prices, upper limit	$ 11.16
Options Outstanding, Number outstanding	37,500
Options Outstanding, Weighted average remaining contractual life	2 years 6 months
Options Outstanding, weighted average exercise price	$ 11.16