Goodwill and Purchased Intangibles Assets - Schedule of Purchased Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 18,453	$ 15,636
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34,900	27,500
Accumulated Amortization	(16,447)	(11,864)
Net Carrying Amount	$ 18,453	$ 15,636