Summary of Significant Accounting Policies - Concentration Risk (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue Benchmark | European Commission
Concentration Risk [Line Items]
Concentration risk, percentage	40.00%
Revenue Benchmark | Government of Australia
Concentration Risk [Line Items]
Concentration risk, percentage	21.00%
Revenue Benchmark | Government of Canada
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Revenue Benchmark | U.S. government
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%	71.00%	46.00%
Revenue Benchmark | CEPI
Concentration Risk [Line Items]
Concentration risk, percentage		12.00%	47.00%
Revenue Benchmark | SK bioscience, Co., Ltd.
Concentration Risk [Line Items]
Concentration risk, percentage		14.00%
Accounts Receivable | European Commission
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Accounts Receivable | Government of Israel
Concentration Risk [Line Items]
Concentration risk, percentage	21.00%
Accounts Receivable | Gavi, the Vaccine Alliance
Concentration Risk [Line Items]
Concentration risk, percentage		77.00%
Accounts Receivable | U.S. government
Concentration Risk [Line Items]
Concentration risk, percentage	46.00%