Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Grants, U.S. Government Contract and Joint Venture [Abstract]

Schedule of Increase (Decrease) In Accounts Receivable, Unbilled Services, and Deferred Revenue

During the year ended December 31, 2021, changes in the Company's accounts receivables and deferred revenue balances were as follows (in thousands):

	December 31, 2020		Additions	Deductions	December 31, 2021
Contract receivables:
Accounts receivable	$	262,012	2,432,268	(2,239,287)	$	454,993
Contract liabilities
Deferred revenue(1)	$	273,228	1,598,152	(275,908)	$	1,595,472

(1) Amount is comprised of $1.4 billion of current Deferred revenue and $172.5 million of non-current Deferred revenue.

Schedule of Grant Revenue

The Company recognized grant revenue as follows (in thousands):

	Year Ended December 31,
	2021		2020
U.S. government partnership (a)	$	788,953	$	204,727
U.S. DoD	21,683		12,519
CEPI	135,445		223,158
BMGF	2,628		12,806
Total grant revenue	$	948,709	$	453,210

(a) U.S. government partnership formerly known as OWS