Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Debt Disclosure [Abstract]
Total debt	$ 30,000	$ 15,000
Less current portion		(4,500)
Long-term debt	30,000	10,500
Deferred debt costs, net of amortization	(299)	(428)
Fair value of associated share warrant, net of amortization	(1,012)	(219)
Long-term debt, less current portion	$ 28,689	$ 9,853