Subsequent Events	6 Months Ended
Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	11. Subsequent Events In August 2022, the Company signed amendment lease agreements for its future cell therapy manufacturing facility and company headquarters and for its existing facilities in South San Francisco, California. The amendments provide for approximately $15.0 million of additional tenant improvement allowances, in addition to the tenant improvement allowances of $25.2 million included in the original lease agreement. Additionally, the amendments increase the rent and term of the lease for some of the Company's existing facilities. As a result of the amendments, the Company expects the lease liability and corresponding right-of-use-asset to increase based on the present value of the remaining minimum rental payments using discount rates as of the effective date of the amendments. At this time, the amount of the increase to the lease liability and corresponding right-of-use-asset has not been determined but will be reflected in the condensed balance sheet as of September 30, 2022.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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