Commitment and Contingencies (Details) $ in Thousands, dose in Millions					3 Months Ended
	Feb. 16, 2024 USD ($)	Dec. 04, 2023 USD ($)	Dec. 28, 2022 lawsuit	Dec. 12, 2022 defendant	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($) installment payment	Mar. 31, 2023 USD ($)	Mar. 25, 2024 USD ($)	Dec. 31, 2023 USD ($)	Nov. 18, 2022 dose	Sep. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Number of defendants | defendant				2
Period to answer				14 days
Loss contingency accrual						$ 47,000			$ 47,000
Number of lawsuits filed | lawsuit			8
Research and development						92,679	$ 247,101
Gavi Advance Purchase Agreement- COVAX Facility
Loss Contingencies [Line Items]
Number of doses to be distributed | dose										350
Purchase agreement, number of vaccine doses | dose										2
Collaboration agreement upfront payment amount						700,000			696,400
Settlement Agreement
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party	$ 75,000	$ 47,000
Litigation settlement, expense	80,000
Grants receivable	$ 225,000					$ 225,000
Settlement payment								$ 42,000			$ 185,000
Number of quarterly installment payments | installment						2
Number of settlement payments | payment						2
Settlement agreement, installment payment						$ 34,300
Research and development						$ 26,600
Settlement Agreement | Forecast
Loss Contingencies [Line Items]
Litigation settlement, expense					$ 400,000
Settlement Agreement | Accrued Liabilities
Loss Contingencies [Line Items]
Settlement payment									$ 68,600