Related Parties	12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]
Related Parties	12. Related Parties In May 2022, the Company entered into a sublease agreement with Crossbow, for which entities affiliated with MPM Capital (“MPM Capital”) are also beneficial owners, to sublease the entirety of its office and laboratory space in Cambridge, Massachusetts. Luke Evnin, Ph.D., the chair of the Company’s board of directors, co-founded MPM Capital and serves as Managing Director of MPM Capital. Briggs Morrison, who serves on the Company’s board of directors, serves as Executive Partner of MPM Capital and Chief Executive Officer of Crossbow. The term of the sublease agreement commenced in June 2022 and ends in March 2024, with no option to extend (see Note 10, Commitments and Contingencies). The Company received cash payments under its sublease of $1.6 million and $0.8 million during the years ended December 31, 2023 and 2022, respectively. In addition, the Company received $0.2 million from Crossbow in June 2022 as a security deposit. The security deposit is included within accrued expenses and other current liabilities in the accompanying consolidated balance sheet as of December 31, 2023 and is included within other liabilities in the accompanying consolidated balance sheet as of December 31, 2022.

Related Parties

12 Months Ended

Dec. 31, 2023

12. Related Parties

In May 2022, the Company entered into a sublease agreement with Crossbow, for which entities affiliated with MPM Capital (“MPM Capital”) are also beneficial owners, to sublease the entirety of its office and laboratory space in Cambridge, Massachusetts. Luke Evnin, Ph.D., the chair of the Company’s board of directors, co-founded MPM Capital and serves as Managing Director of MPM Capital. Briggs Morrison, who serves on the Company’s board of directors, serves as Executive Partner of MPM Capital and Chief Executive Officer of Crossbow. The term of the sublease agreement commenced in June 2022 and ends in March 2024, with no option to extend (see Note 10, Commitments and Contingencies). The Company received cash payments under its sublease of $1.6 million and $0.8 million during the years ended December 31, 2023 and 2022, respectively. In addition, the Company received $0.2 million from Crossbow in June 2022 as a security deposit. The security deposit is included within accrued expenses and other current liabilities in the accompanying consolidated balance sheet as of December 31, 2023 and is included within other liabilities in the accompanying consolidated balance sheet as of December 31, 2022.