Components of Net Deferred Taxes (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets
Net operating loss and tax credit carryforwards	$ 50,604	$ 62,835
Stock-based compensation	13,607	15,488
Nondeductible reserves and accruals	9,570	9,739
Foreign net operating loss carryforwards	6,778	7,360
Deferred revenue	4,404	3,677
Depreciation and amortization	114	485
Other, net	949	128
Deferred Tax Assets, Gross, Total	86,026	99,712
Deferred tax liabilities
Goodwill	(7,843)	(7,136)
In-process research and development	(4,564)	(4,593)
Depreciation	(9,211)	(2,175)
Basis differences on other investments	(6,124)	(7,146)
Domestic deferred tax liability on foreign net operating loss carryforwards	(584)	(680)
Deferred Tax Liabilities, Net	(28,326)	(21,730)
Net deferred tax assets	57,700	77,982
Valuation allowance	(15,170)	(1,302)
Net deferred tax assets	42,530	76,680
Long-term deferred tax assets, net	43,336	77,502
Long-term deferred tax liabilities	(806)	(822)
Net deferred tax assets	$ 42,530	$ 76,680