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Revenue Recognition - Summary of balances and activities in our contract asset account (Details) - Cp G1018 [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Contract Asset Account [Abstract]    
Balance at Beginning of Period $ 62,525 [1] $ 0
Contract asset, Additions [2] 17,556 [1] 62,525
Contract asset, Subtractions [1] 8,116  
Balance at End of Period [1] $ 71,965 $ 62,525
[1] Includes $0.7 million of contract assets derived from our agreement with the DoD.
[2] Additions are revenues recognized for CpG 1018 adjuvant transferred to Clover that is reserved under the CEPI Agreement and for services performed under our agreement with the DoD.