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Related Party Transactions - Additional Information (Details) - Sutro Biopharma, Inc - USD ($)
3 Months Ended 6 Months Ended
May 29, 2018
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
License Agreement          
Related Party Transaction [Line Items]          
Percentage of royalty payment on annual net sales of vaccine products for human health   4.00%   4.00%  
Percentage of royalty payment on net sales of vaccine compositions for animal health   2.00%   2.00%  
Supply Agreement          
Related Party Transaction [Line Items]          
Expenses related to agreement   $ 0 $ 700,000 $ 0 $ 2,400,000
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