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Revenue Recognition - Summary of balances and activities in our contract asset account (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Zhejiang Clover Biopharmaceuticals Inc And Clover Hong Kong Inc | Supply Agreement    
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]    
Contract with customer, asset, allowance for credit loss   $ 11,000
CpG 1018 adjuvant    
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]    
Balance at Beginning of Period $ 351  
Additions 2,847  
Subtractions (1,613)  
Balance at End of Period 1,585  
Balance at Beginning of Period 71,307  
Additions 0  
Subtractions 10,970  
Balance at End of Period 60,337  
Contract asset $ 1,585 $ 351