Investments - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Mar. 09, 2021	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Common stock, shares outstanding (in shares)		285,655,428	275,285,582
Gain on marketable investment		$ 94,431
NantKwest, Inc. and ImmunityBio
Schedule Of Equity Method Investments [Line Items]
Percentage of business acquisition	100.00%
Receive shares of common stock for each outstanding share	$ 0.8190
ImmunityBio
Schedule Of Equity Method Investments [Line Items]
Common stock, shares outstanding (in shares)	10,000,000
Common stock received	8,190,000