Revenue	6 Months Ended
Revenue	Jun. 30, 2023
Revenue From and Not From Contracts [Abstract]
Revenue	Revenue The Company’s revenue consists of amounts received related to research services provided to customers. Contract Revenue In April 2021, the Company entered into a research collaboration and license agreement with Spark Therapeutics, Inc. (“Spark”). Under the agreement, the Company will be responsible for a research program, which includes designing, building and testing five cell type specific-synthetic promoters for use in developing certain gene therapies using the Company’s proprietary technology. The Company received an upfront payment from Spark of $3.0 million and Spark is obligated to reimburse the Company for costs and expenses incurred for the research program. The Company expected to complete the research program over a two-year period. The Company assessed this agreement in accordance with ASC 606, Revenue Recognition (“ASC 606”) and concluded that the contract counterparty, Spark, is a customer. The Company identified only one combined performance obligation in the agreement, which is to perform research services, the related joint research plan and committees for the five specified promoters. The Company determined that the research activities for each of the five promoters are not distinct given there is one single research plan that is performed by the same research team and research results for one promoter may provide insights for other promoters. Pursuant to the agreement, once the research program is completed and the Company delivers a data package to Spark, Spark has 24 months (the “Evaluation Period”) to determine whether Spark will exercise its options to obtain field-limited, royalty-bearing licenses to develop, manufacture and commercialize promoters corresponding to each of the five specified promoters being researched. For each licensed promoter option that is exercised, the Company is eligible to receive a license fee, potential research, development and commercial milestone payments and royalties on product sales. Spark may generally terminate the agreement upon 90 days prior written notice or 180 days prior written notice if the licensed promoter is in clinical trials or is being commercialized at the time of termination. The Company evaluated Spark’s optional rights to license, develop, manufacture and commercialize each of the promoter profiles to determine whether they provide Spark with any material rights to purchase the promoter licenses at an incremental discount. The Company’s proprietary technology used to develop the promoters is in the early stages of development, so technological feasibility and probability of developing a product is highly uncertain. As a result, determining the SSP for the optional rights is subject to significant judgment. Given the subjectivity associated with determining the SSP for the right to a future license related to unproven technology at contract inception, the Company also evaluated whether the contract consideration associated with the research services represents the SSP for those services. The Company determined the transaction price, inclusive of the upfront payment and reimbursement of costs and expenses incurred for the research program, is commensurate with SSP for the research being conducted given the specialized nature and reliance on proprietary technology. Based on the Company’s assessment of the optional consideration and the qualitative factors of feasibility and probability of development combined with the quantitative assessment that research services are priced at their SSP, the Company concluded that the license option does not provide Spark with an incremental discount and therefore does not constitute a material right. The transaction price associated with the research services in this agreement consists of the fixed upfront amount of $3.0 million and variable consideration. For Spark collaboration agreement, the Company will recognize the transaction price as research and development services are provided, using a cost-based input method to measure the progress toward completion of its performance obligation and to calculate the corresponding amount of revenue to recognize each period. The Company believes that the cost-based input method is the best measure of progress because other measurements would not reflect how the Company transfers the control related to the performance obligation to our customers. In December 2022, the Company amended the research collaboration and license agreement with Spark to allow for an increase in budget and a two-month extension of the research program. As there were no changes to performance obligations and the services to be provided are not distinct from those already transferred, the transactions was accounted for as a contract modification and a cumulative catch-up of $(0.7) million was recognized in December 2022. In May 2023, the Company amended the research collaboration and license agreement with Spark to allow for an increase in budget and additional two-month extension of the research program. As there were no changes to performance obligations and the services to be provided are not distinct from those already transferred, the transactions was accounted for as a contract modification with no cumulative catch-up necessary. As of June 30, 2023 and December 31, 2022, there was a total of $0.2 million and $0.8 million, respectively, remaining of the upfront payment to be recognized over the remaining period of the research program. For the three months ended June 30, 2023 and 2022, the Company recorded revenue, which was previously included in deferred revenue at the beginning of each period, of $0.2 million and $0.5 million, respectively. For the six months ended June 30, 2023 and 2022, the Company recorded revenue, which was previously included in the deferred revenue at the beginning of each period, of $0.6 million, and $1.0 million respectively. Contract asset balances related to unbilled revenue for our collaboration agreements were zero as of June 30, 2023 and 2022, and are presented within prepaid expenses and other current assets on the condensed consolidated balance sheets. Grant Income In 2021, the Small Business Innovation Research (“SBIR”) awarded the Company a grant in the amount of $2.0 million over two years subject to meeting certain terms and conditions. The purpose of the grant is to support the further development of SENTI-202 for acute myeloid leukemia towards clinical development. Grant income was recognized when qualified research and development costs were incurred and the Company obtained reasonable assurance that the terms and conditions of the grant were met. Entity-wide information During the three months ended June 30, 2023, Customers A and B accounted for 73% and 27%, respectively, of revenue. During the three months ended June 30, 2022, Customers A and B accounted for 82% and 18%, respectively, of revenue. During the six months ended June 30, 2023, Customers A and B accounted for 78% and 22%, respectively, of revenue. During the six months ended June 30, 2022, Customers A and B accounted for 80% and 20%, respectively, of revenue. All revenues were generated in the United States for the three and six months ended June 30, 2023 and 2022.