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Collaborative Research, Development and License Agreements - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Apr. 26, 2023
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accrued liabilities		$ 51,889		$ 51,889		$ 61,066
Accounts receivables, allowance for doubtful accounts		0		0		12,313
Total revenues		94,876	$ 80,630	258,482	$ 205,214
U S Department Of Defense
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Government assistance, award amount						30,000
Government assistance, asset, increase	$ 14,000
Coalition for Epidemic Preparedness Innovations Partners
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Advance Payments forgiven per CEPI-Bio E Assignment Agreement (Note 6)		175,000		175,000
Repayment of advance from customer		67,300		67,300
Accrued liabilities		47,400		47,400
Accrual long term balance		60,300		60,300
Zhejiang Clover Biopharmaceuticals Inc And Clover Hong Kong Inc
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accrual long term balance		60,300		60,300
Zhejiang Clover Biopharmaceuticals Inc And Clover Hong Kong Inc \| Supply Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Contract with customer, asset, allowance for credit loss		11,000		11,000
Contract asset		60,300		60,300		$ 71,300
Biological E. Limited
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts receivables, allowance for doubtful accounts		0		0
Biological E. Limited \| Term 1
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Additional future payment							$ 5,500
Advance payment received							125,000
Biological E. Limited \| Term 2
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Additional future payment							12,300
Advance payment received							$ 250,000
U S Department Of Defense
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenues		$ 4,700	$ 1,300	$ 10,900	$ 7,700