Significant Agreements and Contracts - License Agreement with NantCell - Additional Information (Details) - Nant Cell - USD ($) $ in Millions	1 Months Ended
Apr. 30, 2015	Mar. 31, 2021
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Upfront payment received from customers	$ 10.0
Common stock received	10,000,000
Vested equity received	$ 100.0
Cost-method investments, aggregate carrying amount		$ 100.0
Maximum
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Royalty rate percent of net sales	(5.00%)

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant