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Revenue - NIAID Contract (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Collaboration and Other Agreements [Line Items]      
Revenues $ 58,749,000 $ 151,941,000 $ 77,447,000
NIAID      
Collaboration and Other Agreements [Line Items]      
Total potential value 25,100,000    
RevenuesFromGrantsMember | NIAID      
Collaboration and Other Agreements [Line Items]      
Number of product candidates to develop   2  
Revenues $ 1,600,000 $ 1,900,000 $ 1,800,000