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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 |  |

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