Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events GeneFab, LLC. On August 10, 2023, the Company announced the transaction with GeneFab, a new independent contract manufacturing and synthetic biology biofoundry focused on next-generation cell and gene therapies. The Company sold, assigned and transferred its rights, title and interest in certain of the assets and contractual rights, including all of the Company’s equipment and leasehold improvements at the Company’s facilities in Alameda and certain of the Company’s intellectual property related to the schematics for and design of the Alameda facility, and subleased to GeneFab its premises under the lease for the Alameda facility. The transaction provided the Company with additional capital and reduced longer term operating expenses. a.Under the terms of the agreement, the Company will receive $37.8 million in cash before the end of 2025. Approximately $18.9 million was due at closing, which amount was netted against prepayment owed by the Company for manufacturing and support services to GeneFab. The remaining $18.9 million will be paid to the Company in installments in 2024 and 2025. b.The Company has agreed to prepay GeneFab $18.9 million for manufacturing and research activities. In addition, the Company will receive $8.0 million of manufacturing credit from GeneFab for their services. c.The Company subleased the cGMP facility in Alameda, CA to GeneFab, a portion of which will be subject to the satisfaction of certain conditions, which will support the clinical manufacturing of the Company’s chimeric antigen receptor natural killer (CAR-NK) programs, including SENTI-202. d.The Company agreed to grant a license to GeneFab under certain of its intellectual property rights to conduct manufacturing services and to research, develop, manufacture and commercialize products outside of oncology, pursuant to a license agreement under negotiation. e.Philip Lee, Ph.D., former Co-Founder and Chief Technology Officer of the Company, assumed the role of Chief Executive Officer of GeneFab. f.GeneFab intends to extend offers of employment to approximately forty-six of the Company's employees currently employed in its research and development and manufacturing functions. Employees that accept the offers of employment will continue to be actively engaged in the CMC and manufacturing components for the clinical manufacturing of the Company’s Gene Circuit products. g.GeneFab was provided an option to purchase up to $20.0 million of the Company’s common stock at an exercise price of $1.01867. The Option is exercisable for a period of 36 months following the execution of the license agreement. h.The Company and GeneFab entered into a seller economic share agreement (the “SESA”), pursuant to which the Company will be entitled to receive ten percent of the realized gains of GeneFab’s parent company arising and resulting from any cash or in-kind distributions from GeneFab in connection with the dividend or sale event, subject to the terms and conditions of the SESA. As of June 30, 2023, the GeneFab transaction did not meet the assets held for sale classification as management had not committed to a plan to sell the long-term assets. As a result of the signing of the transaction non-binding term sheet in June 2023 with GeneFab and the change in the manner in which the Company expects to recover the assets subject to the GeneFab transaction, the asset group used in the long-lived impairment assessment was changed to two asset groups as of June 30, 2023, the oncology and non-oncology asset group, with the non-oncology including all the assets expected to be transferred in the GeneFab transaction. This asset group reassessment triggered a need to perform an impairment analysis for the non-oncology asset group that considered the final terms of the transaction and no impairment was deemed necessary. NASDAQ Bid Price Compliance Notice On August 7, 2023, the Company received written notice from the Listing Qualifications Department of The Nasdaq Stock Market LLC notifying the Company that, for the last 30 consecutive trading days, the closing bid price of the Company’s common stock had closed below the minimum bid price requirement of $1.00 per share for continued listing on The Nasdaq Global Market. The Company has been provided an initial compliance period of 180 calendar days, or until February 5, 2024, to regain compliance with the minimum bid price requirement.