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Leases | 6 Months Ended
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Jun. 30, 2024
Leases [Abstract] |
Leases | 10. Leases The Company leases its office and facilities in Boston, Massachusetts under a non-cancellable operating lease agreement that continues through December 31, 2032. Cash paid for operating lease liabilities were $1.6 million and $1.2 million during the six months ended June 30, 2024 and 2023, respectively, which is included in operating cash flows within the accompanying unaudited condensed consolidated statements of cash flows. The components of operating lease expense were as follows (in thousands):
| Three Months Ended June 30, |  |  | Six Months Ended June 30, |
| 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Lease cost |  |  |  |  |  |  |  |  |  |  |
Operating lease cost | $ | 663 |  |  | $ | 663 |  |  | $ | 1,327 |  |  | $ | 1,319 |
Variable lease cost |  | 412 |  |  |  | 230 |  |  |  | 957 |  |  |  | 288 |
Short-term lease cost |  | — |  |  |  | — |  |  |  | — |  |  |  | 488 |
Total operating lease cost | $ | 1,075 |  |  | $ | 893 |  |  | $ | 2,284 |  |  | $ | 2,095 |
The Company subleases approximately 17,729 square feet of office and laboratory space in the building located at 321 Harrison Avenue, Boston, Massachusetts. The Company remains jointly and severally liable under the head lease and accounts for the sublease as an operating lease. The lease term commenced on March 24, 2023 and is expected to end in March 2026. The Company recognized sublease income of $0.7 million and $1.5 million for the three and six months ended June 30, 2024, respectively, and $0.6 million for the three and six months ended June 30, 2023.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//842-20/tableOfContent + Details
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