Investments - NANTibody - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Apr. 30, 2015
Schedule Of Equity Method Investments [Line Items]
Equity investments	$ 155,979,000	$ 256,397,000
Net Income (loss)	2,418,000		$ (69,180,000)
Current assets of equity method investment	265,701,000	86,234,000
Current liabilities of equity method investment	96,044,000	96,480,000
NANTibody
Schedule Of Equity Method Investments [Line Items]
Equity method investment ownership percentage					40.00%
Equity investments	$ 0		$ 1,900,000
Net Income (loss)		(800,000)		$ (1,400,000)
Current assets of equity method investment		4,900,000
Current liabilities of equity method investment		5,500,000
Noncurrent assets of equity method investment		100,000
Noncurrent liabilities of equity method investment		$ 0
NANTibody | Nant Cell
Schedule Of Equity Method Investments [Line Items]
Equity method investment ownership percentage					60.00%