Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	$ 2,999
Ending balance	2,590	$ 2,999
Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	2,999	2,601
Warrant issuance with equity offering		4,255
Warrant issuance with senior secured term loan		106
Mark to market adjustment	(409)	(3,963)
Ending balance	$ 2,590	$ 2,999