Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

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,
	2023		2022		2021		2023		2022
European Commission	27	%	40%		*		28	%	10%
Government of Australia	18	%	21%		*		*		*
Government of Canada	*		10%		*		59%		*
Government of Israel	*		*		*		*		21%
U.S. government(1)	43	%	19	%	71	%	*		46%
CEPI	*		*		12	%	*		*
SK bioscience, Co., Ltd.	*		*		14	%	*		*

*Amounts represent less than 10%

(1)    Including the USG Agreement (as defined in Note 3) and the U.S. Department of Defense.

Schedule of Property and Equipment, Net

The estimated useful lives of property and equipment are described below:

	Useful Life
Buildings	25 years
Machinery and equipment	5 - 7 years
Computer hardware	3 years
Leasehold improvements	Shorter of useful life or remaining term of the lease

Property and equipment is comprised of the following as of (in thousands):

	December 31,
	2023		2022
Land and buildings	$	102,916	$	101,342
Machinery and equipment	148,243		134,809
Leasehold improvements	48,310		18,895
Computer hardware	5,114		4,927
Construction in progress	76,156		81,566
	380,739		341,539
Less: accumulated depreciation	(74,968)		(47,292)
Property and equipment, net	$	305,771	$	294,247