U.S. Government Agreements, Grants and Licenses - Operation Warp Speed (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Agreements, Grants and Licenses
Revenue		$ 157,024	$ 2,507	$ 195,939	$ 9,846
Government contract
Agreements, Grants and Licenses
Maximum funding entitled to receive from U.S. government				1,660,000
Revenue		42,938		$ 43,249
Operation Warp Speed - Project Agreement | Government contract
Agreements, Grants and Licenses
Maximum funding entitled to receive from U.S. government	$ 1,600,000
Authorized expenditures or obligations	$ 800,000
Number of doses of the vaccine	100,000
Revenue		$ 39,400