Consolidated Balance Sheet Detail - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Payables And Accruals [Abstract]
Accrued legal and professional fees	$ 1,739	$ 405
Accrued interest	3,718	6,628
Goods received not invoiced	2,456	1,337
Accrued capital expenditure	1,256	801
Other accrued expenses	3,670	3,287
Total accrued expenses and other current liabilities	$ 12,839	$ 12,458