Stock-Based Compensation - Stock Option Activity under All Plans and Other Grants (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Outstanding, Beginning Balance	851,165
Number of Shares, Granted	200,000	158,000
Number of Shares, Exercised	(38,500)
Number of Shares, Canceled or expired	(4,000)
Number of Shares, Outstanding, Ending Balance	1,008,665	851,165
Number of Shares, Options exercisable at June 30, 2014	548,998
Number of Shares, Unvested options expected to become exercisable after June 30, 2014	459,667
Number of Shares, Shares available for future option grants at June 30, 2014	351,919
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 1,516
Aggregate Intrinsic Value, Exercised	146
Aggregate Intrinsic Value, Outstanding, Ending Balance	3,743	1,516
Aggregate Intrinsic Value, Options exercisable at June 30, 2014	2,366
Aggregate Intrinsic Value, Unvested options expected to become exercisable after June 30, 2014	$ 1,377
Approximate Remaining Contractual Term, Outstanding	8 years	8 years
Approximate Remaining Contractual Term, Granted	10 years
Approximate Remaining Contractual Term, Options exercisable at June 30, 2014	8 years
Approximate Remaining Contractual Term, Unvested options expected to become exercisable after June 30, 2014	9 years
Weighted-Average Exercise Price Outstanding, Beginning Balance	$ 8.15
Weighted-Average Exercise Price, Granted	$ 12.78
Weighted-Average Exercise Price, Exercised	$ 8.61
Weighted-Average Exercise Price, Canceled or expired	$ 8.80
Weighted-Average Exercise Price, Outstanding, Ending Balance	$ 9.05	$ 8.15
Weighted-Average Exercise Price, Options exercisable at June 30, 2014	$ 8.44
Weighted-Average Exercise Price, Unvested options expected to become exercisable after June 30, 2014	$ 9.76