Investments - Additional Information (Details) - USD ($)		1 Months Ended			12 Months Ended
	Mar. 09, 2021	Jul. 31, 2021	May 31, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Equity method investment, impairment losses					$ 39,000,000.0	$ 0	$ 3,800,000
Common stock, shares outstanding (in shares)					522,817,137	314,573,225
Proceeds from sale of marketable investments						$ 124,767,000
NantKwest, Inc. and ImmunityBio
Schedule Of Equity Method Investments [Line Items]
Percentage of business acquisition	100.00%			100.00%
ImmunityBio
Schedule Of Equity Method Investments [Line Items]
Common stock, shares outstanding (in shares)				10,000,000
Realized gain (loss) on marketable investments						$ 24,100,000
Marketable investments shares sold						8,190,000
Proceeds from sale of marketable investments						$ 124,000,000.0
ImmunityBio | Common Stock
Schedule Of Equity Method Investments [Line Items]
Remaining shares						0
ImmunityBio | Maximum
Schedule Of Equity Method Investments [Line Items]
Common stock received				8,190,000
Aardvark
Schedule Of Equity Method Investments [Line Items]
Equity method investment, impairment losses					$ 0
Aardvark | Series B Preferred Stock
Schedule Of Equity Method Investments [Line Items]
Payments to acquire equity investment		$ 5,000,000.0	$ 5,000,000.0			$ 10,000,000.0
Shares purchased under equity investment		3,888,932	3,888,932			7,777,864
Deverra
Schedule Of Equity Method Investments [Line Items]
Payments to acquire equity investment						$ 4,100,000
Aggregate principal amount						6,000,000.0
Unpaid accrued interest						100,000
Deverra | Common Stock
Schedule Of Equity Method Investments [Line Items]
Payments to acquire equity investment						$ 10,200,000
Shares purchased under equity investment						5,622,703
Elsie
Schedule Of Equity Method Investments [Line Items]
Impairment charge of investment					$ 10,000,000.0
Elsie | Series A Preferred Stock
Schedule Of Equity Method Investments [Line Items]
Payments to acquire equity investment						$ 10,000,000.0
Shares purchased under equity investment						10,000,000