Revenue - Schedule of Grant Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	$ 983,705	$ 1,981,872	$ 1,146,290
Grants
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	427,323	382,921	948,709
Grants | USG Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	427,323	380,996	788,953
Grants | U.S. DoD
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	0	1,925	21,683
Grants | CEPI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	0	0	135,445
Grants | Other grant revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenue	$ 0	$ 0	$ 2,628