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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Schedules of Concentration of Risk
The Company's accounts receivable arise from revenue arrangements with customers in different countries. The Company's revenue is primarily due to product sales, grants made by government-sponsored and private organizations, and royalties from its collaboration and license partners. The following customers accounted for more than 10% of total revenue or accounts receivable for the periods presented:
Percentage of Revenue
 for Year Ended December 31,
Percentage of Accounts Receivable as of December 31,
20222021202020222021
European Commission40 %**10 %*
Government of Australia21 %****
Government of Canada10 %****
Government of Israel***21 %*
Gavi, the Vaccine Alliance****77 %
U.S. government(1)
19 %71 %46 %46 %*
CEPI*12 %47 %**
SK bioscience, Co., Ltd.*14 %***
*Amounts represent less than 10%
(1)    Including the USG Agreement (as defined in Note 3) and Department of Defense.
Schedule of Property and Equipment, Net The estimated useful lives of property and equipment are described below:
Useful Life
Buildings25 years
Machinery and equipment
5 - 7 years
Computer hardware3 years
Leasehold improvements
Shorter of useful life or remaining term of the lease
Property and equipment is comprised of the following at December 31 (in thousands):
December 31,
20222021
Land and buildings$101,342 $83,534 
Machinery and equipment134,809 119,998 
Leasehold improvements18,895 10,282 
Computer hardware4,927 2,612 
Construction in progress81,566 35,114 
341,539 251,540 
Less: accumulated depreciation(47,292)(25,799)
Property and equipment, net$294,247 $225,741