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Revenue Recognition - Summary of balances and activities in our contract asset account (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
USD ($)
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 10,903
Subtractions (8,178)
Balance at End of Period 3,076
Balance at Beginning of Period 71,307
Additions 0
Subtractions (10,970)
Balance at End of Period 60,337
Contract asset $ 3,076