Provision for Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Current:
Federal	$ (596)	$ (685)
Foreign, state and other	5	8
Prior year federal and state, with interest	154	48
Uncertain tax positions, federal and state		(249)
Deferred:
Federal	540	602
Foreign, state and other	69	17
Provision for income tax expense (benefit)	$ 172	$ (259)