Collaborations - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 05, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue		$ 75,659	$ 55,204	$ 140,172	$ 114,443
Deferred Revenue Current		81,923		81,923		$ 62,939
Prepaid expenses and other current assets		20,240		20,240		25,139
Cost of Revenue		37,386	27,276	76,409	55,818
Accounts Payable and Other Accrued Liabilities, Current		44,420		44,420		44,588
Subsequent Event
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Aggregate Cash Consideration For Collaboration Arrangement	$ 50,000
G S K
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue		14,900	10,000	23,200	21,200
Deferred Revenue Current		36,000		36,000		9,200
Prepaid expenses and other current assets		50,000		50,000		0
Research and development expense		2,700	5,900	6,300	11,900
Cost of Revenue		300	$ 200	500	$ 300
Accounts Payable and Other Accrued Liabilities, Current		$ 6,400		$ 6,400		$ 18,300
Voting interest percentage				18.40%		16.30%