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Related Party Transactions - Additional Information (Details) - USD ($) |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May 29, 2018 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Oct. 31, 2022 | Jan. 31, 2022 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Common stock, shares owned |  | 79,470,670 | 53,031,978 |  |  |  |
Warrant exercised |  | 0 |  |  | 0.001 | 0.001 |
Sutro Biopharma, Inc |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Common stock, shares owned |  |  | 1,600,000 | 1,600,000 |  |  |
Sutro Biopharma, Inc | License Agreement |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage of royalty payment on annual net sales of vaccine products for human health |  | 4.00% |  |  |  |  |
Percentage of royalty payment on net sales of vaccine compositions for animal health |  | 2.00% |  |  |  |  |
Sutro Biopharma, Inc | Supply Agreement |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Expenses related to agreement |  | $ 0.0 | $ 2,400,000 | $ 1,200,000 |  |  |
Sutro Biopharma, Inc | Series C Redeemable Convertible Stock |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrant to purchase shares of stock |  |  |  |  |  |  | 59,276
Warrant purchase price per share |  |  |  |  |  |  | $ 11.5215
Sutro Biopharma, Inc | Series C Redeemable Convertible Stock | License Amendment A2 |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrant to purchase shares of stock | 59,276 |  |  |  |  |  |
Warrant purchase price per share | $ 11.5215 |  |  |  |  |  |
Warrant exercisable and vests immediately and expires date | May 29, 2018 |  |  |  |  |  |
Sutro Biopharma, Inc | Common Stock |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrant to purchase shares of stock |  |  |  |  |  |  | 31,857
Warrant purchase price per share |  |  |  |  |  |  | $ 0.79289
Sutro Biopharma, Inc | Common Stock Warrant |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrant exercised |  |  |  |  |  |  | 30,278
Sutro Biopharma, Inc | Preferred Stock Warrant |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrant exercised |  |  |  |  |  |  | 16,591
Change in fair value of redeemable convertible preferred stock warrant |  | $ 0 | $ 0 | $ 200,000 |  |  |

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