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Grant Agreements - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jan. 13, 2022
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Accrued and other liabilities   $ 282,616   $ 282,616   $ 236,512
Grant Revenue            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Revenue from grants   3,125 $ 903 7,704 $ 5,356  
Human Immunodeficiency Virus ('HIV') Grant | Maximum            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Grant awarded amount. maximum   55,700   55,700    
Vaccinal Antibody Grant | Grant Revenue            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Revenue from grants   2,800 $ 900 7,400 $ 5,200  
Vaccinal Antibody Grant | Bill And Melinda Gates Foundation            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Deferred revenue   24,300   24,300   6,900
Common Stock, Shares Purchased 881,365          
Common Stock, Shares Purchased, Share Price $ 45.38          
Common Stock, Shares Purchased , Aggregate Purchase Price $ 40,000          
Common stock, shares issued, fair market value $ 28,500          
Closing stock price $ 37.65          
Underlying shares, Premium received $ 11,300          
Accrued and other liabilities   $ 0   0   $ 1,800
BARDA            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Potential maximum amount of grant       1,000,000    
Maximum amount of grant during the base period       $ 55,000