Goodwill and Purchased Intangibles Assets - Schedule of Purchased Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 15,636	$ 12,986
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,500	20,116
Accumulated Amortization	(11,864)	(7,130)
Net Carrying Amount	$ 15,636	$ 12,986