Consolidated Balance Sheet Detail - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Payables And Accruals [Abstract]
Accrued legal and professional fees	$ 449	$ 102
Accrued interest	4,640	225
Goods received not invoiced	932	911
Accrued capital expenditure	1,387	2,253
Accrued development expenditure	4,187	3,533
Other accrued expenses	1,914	2,156
Total accrued expenses and other current liabilities	$ 13,509	$ 9,180