Stockholders' Equity - Stock Option Activity Under Plan (Detail) (2008 Incentive Plan [Member], USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2014
2008 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Outstanding, Beginning balance	3,791,001
Number of Options, Granted	456,200
Number of Options, Exercised	(39,037)
Number of Options, Forfeited	(2,125)
Number of Options Outstanding, Ending balance	4,206,039
Number of Options, Outstanding at September 30, 2014 - vested or unvested and expected to vest	4,117,608
Number of Options, Exercisable at September 30, 2014	2,960,677
Weighted Average Exercise Price Outstanding, beginning balance	$ 3.08
Weighted Average Exercise Price, Granted	$ 4.47
Weighted Average Exercise Price, Exercised	$ 1.43
Weighted Average Exercise Price, Forfeited	$ 5.05
Weighted Average Exercise Price Outstanding, ending balance	$ 3.24
Weighted Average Exercise Price, Outstanding at September 30, 2014 - vested or unvested and expected to vest	$ 3.23
Weighted Average Exercise Price, Exercisable at September 30, 2014	$ 3.02
Weighted Average Remaining Contractual Life Outstanding, Ending balance	6 years 7 months 17 days
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2014 - vested or unvested and expected to vest	6 years 6 months 29 days
Weighted Average Remaining Contractual Life, Exercisable at September 30, 2014	5 years 8 months 23 days
Aggregate Intrinsic Value Outstanding, Ending balance	$ 5,268
Aggregate Intrinsic Value, Outstanding at September 30, 2014 - vested or unvested and expected to vest	5,217
Aggregate Intrinsic Value, Exercisable at September 30, 2014	$ 4,396