Components of Net Deferred Taxes (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Deferred tax assets
Net operating loss and tax credit carryforwards	$ 29,802	$ 27,893
Stock-based compensation	14,608	13,790
Nondeductible reserves and accruals	15,441	12,097
Foreign net operating loss carryforwards	9,107	6,856
Deferred revenue	5,830	5,522
Other, net	312	363
Deferred Tax Assets, Gross, Total	75,100	66,521
Deferred tax liabilities
Goodwill	(7,829)	(7,897)
In-process research and development	(12,063)	(12,496)
Depreciation	(14,197)	(11,747)
Basis differences on other investments	(11,442)	(7,766)
Domestic deferred tax liability on foreign net operating loss carryforwards	(393)	(415)
Deferred Tax Liabilities, Net	(45,924)	(40,321)
Net deferred tax assets	29,176	26,200
Valuation allowance	(19,405)	(15,667)
Net deferred tax assets	9,771	10,533
Deferred tax assets	10,552	11,380
Deferred tax liabilities	(781)	(847)
Net deferred tax assets	$ 9,771	$ 10,533