Income Taxes - Components of Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Provisions and reserves	$ 1,022	$ 1,315
Operating lease liability	4,100	3,409
Net operating loss carry forwards	22,644	19,526
Gross deferred tax assets	27,766	24,250
Fixed asset basis difference	(2,289)	(90)
Operating lease right-of-use assets	(4,100)	(3,409)
Gross deferred tax liabilities	6,389	3,499
Net deferred tax asset	21,377	20,751
Valuation allowance	22,946	20,514
Net deferred taxes	$ (1,569)
Net deferred taxes		$ 237