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Leases | 9 Months Ended
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Sep. 30, 2023
Leases [Abstract] |
Leases | 7. Leases In September 2020, the Company entered into an operating lease agreement, denominated in Swedish Krona, for office and laboratory space located in Lund, Sweden. The term of the lease commenced in October 2020 and expired in September 2023, with an option to extend the term for an additional three years. In September 2023, the Company modified the lease agreement. The modification extended the lease term for an additional month, resulting in a de minimis impact to the ROU asset and corresponding lease liability. In addition, the Company entered into an operating lease agreement in September 2023 for office and laboratory space located in Lund, Sweden. This lease is expected to commence prior to the end of the year and has an initial term of three years, with an option to extend the term for an additional three years. Aggregate estimated undiscounted rental payments due over the term of this lease is $0.5 million. In December 2020, the Company entered into a lease agreement for laboratory and office space located at 480 Arsenal Way, Watertown, Massachusetts (the “Arsenal Way Lease”). The term of the lease commenced in April 2021. The lease has an initial term from the rent commencement date, which is a month after the lease commencement date, of approximately seven years, with an option to extend the term for an additional five years at then-market rental rates. In connection with the execution of the lease agreement, the Company delivered a letter of credit of $0.3 million to the landlord, which is included in restricted cash in the accompanying condensed consolidated balance sheets. The landlord contributed an aggregate of $0.7 million toward the cost of tenant improvements for the premises. Under the terms of the lease, the base rent is $1.0 million, subject to a 3% annual rent increase, plus an allocation of operating expenses and taxes. In May 2021, the Company entered into an agreement to sublease 6,330 rentable square feet of its Arsenal Way Lease to a subtenant through March 2023. Sublease income was recognized on a straight-line basis over the term of the sublease agreement. Sublease rent income, including common area maintenance charges, was $0.2 million for the three months ended September 30, 2022, and $0.2 million and $0.6 million for each of the nine months ended September 30, 2023 and 2022, respectively, which was allocated and recorded as a reduction to general and administrative expenses and research and development expenses. The Company was not relieved of its primary obligation under the Arsenal Way Lease as a result of the sublease. The Company recognizes monthly operating lease expense on a straight-line basis over the term of the lease as research and development or general and administrative expenses in the condensed consolidated statements of operations and comprehensive loss. Variable lease expense relates primarily to office lease common area maintenance, insurance, and property taxes, is expensed as incurred, and is excluded from the calculation of the lease liabilities and right-of-use-assets. The following table summarizes the presentation of the Company’s operating leases on its condensed consolidated balance sheets (in thousands):
Leases |  | Balance sheet classification |  | September 30, 2023 |  |  | December 31, 2022 |
Assets: |  |  |  |  |  |  |  |
Operating lease assets |  | Operating lease right-of-use assets |  | $ | 4,186 |  |  | $ | 4,770 |
Total lease assets |  |  |  | $ | 4,186 |  |  | $ | 4,770 |
Liabilities: |  |  |  |  |  |  |  |
Current: |  |  |  |  |  |  |  |
Operating lease liabilities |  | Operating lease liability, current |  | $ | 776 |  |  | $ | 726 |
Noncurrent: |  |  |  |  |  |  |  |
Operating lease liabilities |  | Operating lease liability, long-term |  |  | 3,644 |  |  |  | 4,235 |
Total lease liabilities |  |  |  | $ | 4,420 |  |  | $ | 4,961 |
The components of lease cost under ASC 842 included within research and development expenses and general and administrative expenses in the Company’s condensed consolidated statements of operations and comprehensive loss were as follows (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
Lease cost |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Operating lease cost |  | $ | 286 |  |  | $ | 286 |  |  | $ | 857 |  |  | $ | 857 |
Variable lease cost |  | 152 |  |  | 130 |  |  | 400 |  |  | 393 |
Sublease income |  |  | — |  |  |  | (134 | ) |  |  | (134 | ) |  |  | (403 | )
Total lease cost |  | $ | 438 |  |  | $ | 282 |  |  | $ | 1,123 |  |  | $ | 847 |
As of September 30, 2023 and December 31, 2022, the weighted-average remaining lease term for operating leases was 4.6 years and 5.3 years, respectively, and the weighted-average discount rate was 7.87% and 7.86%, respectively. Cash paid for amounts included in the measurement of lease liabilities was $0.8 million for the nine months ended September 30, 2023. Future minimum annual lease commitments under the Company’s non-cancelable operating leases as of September 30, 2023 were as follows (in thousands):
Year ended December 31, |  | Amount |
2023 (remaining 3 months) |  | $ | 269 |
2024 |  |  | 1,098 |
2025 |  |  | 1,131 |
2026 |  |  | 1,165 |
2027 |  |  | 1,200 |
Thereafter |  |  | 404 |
Total lease payments |  |  | 5,267 |
Less: interest |  |  | (847 | )
Present value of operating lease liabilities |  | $ | 4,420 |

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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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