Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 113,465	$ 113,924
Less: accumulated depreciation and amortization	(77,761)	(75,316)
Property and equipment, net	35,704	38,608
Computer and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	10,015	10,376
Laboratory Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	52,689	52,785
Furniture and Office Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	8,953	8,946
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	40,955	40,964
Capitalized Asset Retirement Obligations
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 853	$ 853

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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