Collaborations (Details)	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 31, 2023 program	Jul. 31, 2018	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2024 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue			$ 44,071,000	$ 49,999,000	$ 84,485,000	$ 110,863,000
Cost of revenue			21,664,000	28,270,000	41,564,000	58,453,000
G S K
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaboration agreement, period		4 years
G S K | Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue			0	1,100,000	0	11,800,000
Cost of revenue			0	0	0	0
Research and development expense, net			(400,000)		200,000
Research and development expense				4,900,000		8,200,000
Accounts payable, accrued expenses and other current liabilities			1,900,000		1,900,000		$ 10,600,000
G S K 2023 Amendment
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Proceeds from license fees received							20,000,000
License for data access, expiration period	1 year
Deferred revenue			20,000,000		20,000,000
Programs, opted-out of cost sharing and other research and development | program	3
G S K 2023 Amendment | Related Party
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Deferred revenue			20,000,000.0		20,000,000.0		$ 20,000,000.0
Total revenue			$ 17,000	$ 0	$ 17,000	$ 0