Income Taxes - Schedule of Components of Income Tax Expense (Benefit) Attributable to Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Current
Federal	$ 374	$ 765	$ 459
State	0	0	0
Foreign	592	619	1,950
Total current	966	1,384	2,409
Deferred
Federal	(1,086)	60	(18)
State	0	0	0
Foreign	(41)	(302)	0
Total deferred	(1,127)	(242)	(18)
Income tax (benefit) expense	$ (161)	$ 1,142	$ 2,391