Balance Sheet Components - Schedule of Accrued Expense and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Accrued payables	$ 13,090	$ 17,030
Accrued compensation and benefits	4,601	5,898
Accrued vacation	7,310	8,839
Accrued bonus	5,740	21,600
Accrued clinical expenses	10,172	11,707
Accrued taxes and other	1,211	1,356
Total accrued expenses and other current liabilities	$ 42,124	$ 66,430