Provision for Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Current:
Federal	$ (437)	$ 3,071
Foreign, state and other	6	8
Prior year federal and state, with interest		119
Deferred:
Federal	69	272
Foreign, state and other	10	(9)
(Benefit) provision for income tax expense	$ (352)	$ 3,461