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Collaborations - Additional Information (Details)	1 Months Ended		12 Months Ended
Collaborations - Additional Information (Details)	Oct. 31, 2023 program	Jul. 31, 2018	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue			$ 189,896,000	$ 219,638,000	$ 299,489,000
Cost of revenue			89,892,000	121,739,000	167,204,000
Current liabilities of discontinued operations			0	21,372,000
Payable for shared costs included in liabilities subject to compromise			113,504,000	0
Discontinued Operations
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development			31,611,000	96,037,000	100,962,000
Current liabilities of discontinued operations			0	21,372,000
GSK
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaboration agreement, period		4 years
GSK \| Related Party
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue			0	11,800,000	47,400,000
Cost of revenue			0	300,000	500,000
Payable for shared costs included in liabilities subject to compromise			2,300,000	10,600,000
GSK \| Related Party \| Discontinued Operations
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development			500,000	12,800,000	10,700,000
GSK 2023 Amendment
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Proceeds from license fees				20,000,000.0
License for data access expiration period	1 year
Programs, opted-out of cost sharing and other research and development \| program	3
GSK 2023 Amendment \| Related Party
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue for customer services			300,000	20,000,000.0
Revenue			$ 19,700,000	$ 0	$ 0