Other Balance Sheet Components - Deferred Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Change In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 202,305
Additions	4,009,960
Deductions	(167,653)
Ending balance	4,044,612
Product sales
Change In Contract With Customer, Liability [Roll Forward]
Beginning balance	0
Additions	3,881,303
Deductions	(82,134)
Ending balance	3,799,169
Grant revenue
Change In Contract With Customer, Liability [Roll Forward]
Beginning balance	2,777
Additions	6,775
Deductions	(4,291)
Ending balance	5,261
Collaboration revenue
Change In Contract With Customer, Liability [Roll Forward]
Beginning balance	199,528
Additions	121,882
Deductions	(81,228)
Ending balance	$ 240,182