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Leases | 12 Months Ended
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Dec. 31, 2023
Leases [Abstract] |
Leases | 10. LEASES All of the Company’s leases are accounted for as operating leases. The Company leases approximately 231,000 square feet of office and laboratory space located at 900 Winter Street in Waltham, Massachusetts (the “900 Winter Street Lease”). The initial term of the lease commenced on January 20, 2020, expires in 2035 and includes an option to extend the term for an additional ten-year period. On November 13, 2023, in connection with the Separation, Alkermes US and Mural US entered into an assignment and assumption of lease agreement (the “Assignment”), pursuant to which Alkermes US assigned to Mural US an operating lease for approximately 180,000 square feet of corporate office space, administrative areas and laboratories located at 852 Winter Street in Waltham, Massachusetts (the “852 Winter Street Lease”). Under the terms of the Assignment, Mural US assumed all of Alkermes US’ obligations under the 852 Winter Street Lease. In accordance with FASB ASC 842, Leases, as the Company can no longer access or direct the use of the asset following the Assignment, the 852 Winter Street Lease no longer meets the definition of a lease for the Company. On November 15, 2023, the effective date of the Assignment, the Company reduced its right-of-use asset and lease liability by $14.5 million and $15.4 million, respectively in the accompanying consolidated balance sheet. In December 2022, the Company exercised an early payment option included within the terms of the 900 Winter Street Lease. The election of such early payment option resulted in a remeasurement of the remaining lease liability and right-of-use asset as of the remeasurement date of December 1, 2022 of $12.8 million. Subsequently, the Company made the early lease payment of $15.3 million in December 2022. As of December 31, 2022, the remeasurement and subsequent payment resulted in an increase in the right-of-use asset of $12.8 million and a net decrease in the lease liability of $2.5 million. At December 31, 2023 and 2022, the operating leases held by the Company had a weighted average incremental borrowing rate of 4.4% and 5.5%, respectively, and a weighted average remaining lease term of 8.7 years and 9.6 years, respectively. During the years ended December 31, 2023, 2022 and 2021, cash paid for amounts included for the measurement of lease liabilities was $10.3 million, $27.0 million and $11.8 million, respectively. The Company recorded operating lease expense of $10.2 million, $10.7 million and $11.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. Future lease payments under non-cancelable leases as of December 31, 2023 consisted of the following:
|  | December 31, |
(In thousands) |  | 2023 |
2024 |  | $ | 10,148 |
2025 |  |  | 10,248 |
2026 |  |  | 10,319 |
2027 |  |  | 9,509 |
2028 |  |  | 9,574 |
Thereafter |  |  | 59,665 |
Total operating lease payments |  | $ | 109,463 |
Less: imputed interest |  |  | (28,008 | )
Total operating lease liabilities |  | $ | 81,455 |

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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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