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Leases | 12 Months Ended
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Dec. 31, 2024
Leases [Abstract] |
Leases | Leases Redwood City The Company has a lease for facilities in Redwood City, California (“Redwood City Premises”), which expires December 31, 2031, with an option to extend for a period of eight years. Related to this lease, the Company provided the landlord with a letter of credit, as amended, in the amount of $2.0 million, which is classified as restricted cash under long-term assets on the Company’s consolidated balance sheets. Prior to September 30, 2023, the Company had two facility leases in Redwood City. In March 2023, the Company entered into an amendment to accelerate the expiration of the lease for one of the facilities in its Redwood City Premises from December 31, 2031 to September 30, 2023. Concurrently, the Company entered into an agreement for additional tenant improvement allowance towards its other Redwood City Premises. The Company accounted for this amendment as a lease modification in accordance with ASC 842-10-25-11(d). As a result of the modification the Company revalued the lease liability based on the new and remaining lease terms, which resulted in a reduction to the lease liability of $7.9 million, and recognized the remeasurement to the lease liabilities as an adjustment to the right-of-use asset. The estimated value of non-cash consideration, composed primarily of leasehold improvements and furniture and fixtures, was $14.9 million, which was fully amortized as of September 30, 2023. There was no charge recognized in the consolidated statement of operations. North Carolina The Company has restated amounts related to this lease. See Notes 2 and 14. On January 8, 2021, the Company entered into an operating lease agreement for a building in North Carolina (“NC Premises”). The lease commenced in April 2021, when the Company obtained control of the NC Premises, and the lease term expires in October 2037 with two options to extend the lease term for a period of five years each. On October 26, 2021, the Company entered into a sublease agreement with Jaguar Gene Therapy, LLC (“Jaguar”) for the NC Premises through October 2037, the remainder of the lease term, and concurrently changed the terms of the head lease. In addition, the remainder of the tenant improvement allowance under the original lease of approximately $22.7 million was transferred to Jaguar. On April 3, 2023, the Company entered into an amendment of the lease of its NC Premises with the landlord and subtenant. Under this amendment, the parties agreed to substantially reduce the total tenant improvement allowance in exchange for lower monthly rent. The Company accounted for this amendment as a lease modification in accordance with ASC 842-10-25-11(d). The Company remeasured the lease liability, resulting in an increase in the lease liability with a corresponding increase of the right-of-use asset of $0.3 million in the quarter ended June 30, 2023. There was no charge recognized in the consolidated statement of operations. During the year ended December 31, 2022, management reassessed the probability of collection of the lease payments from Jaguar over the remaining term of a sublease. At that time, management assessed the collectibility to be less than probable and recognized an adjustment to eliminate the deferred rent receivable as a current period adjustment during the year ended December 31, 2022. Deferred rent receivable was zero as of December 31, 2024 and 2023. In April 2023, Jaguar assigned the sublease to Advanced Medicine Partners, LLC (at that time, a wholly-owned subsidiary of Jaguar, “AMP” or the “subtenant”) as the subtenant for the NC Premises for the remainder of the lease term. Pursuant to the sublease and the notice and waiver of assignment (the “assignment agreement”), Jaguar remained obligated for AMP’s proper performance under the sublease. In February 2025, a lien totaling $4.8 million was filed by a third–party contractor against the subtenant’s interest in the NC Premises. The Company discharged the lien in March 2025 by depositing cash in the full amount with the applicable court in order to avoid a default under the head lease. Subsequently, the subtenant and Jaguar failed to remit the March 2025 rent and subsequent rent payments and defaulted, and failed to cure such defaults, under the sublease and the assignment agreement for the NC Premises. Subsequent to December 31, 2024, the subtenant made payments totaling $1.4 million for January and February 2025 rent and drew $2.3 million from the available tenant improvement allowance, at which point the subtenant discontinued rent payments. The Company assumed responsibility for rent payments in March 2025 and as of April 7, 2025 had made payments in the total payment of $1.9 million to satisfy outstanding rent and common area management fee obligations. See Note 15 Subsequent Events. The Company recorded sublease loss of $14.0 million and sublease income of $0.1 million for the years ended December 31, 2024 and 2023, respectively, which was recognized in general and administrative expense. As of December 31, 2024, the weighted-average remaining lease term was 11.2 years for the Company’s leases and the weighted-average Incremental Borrowing Rate (“IBR”) was 11.6%. As of December 31, 2023, the weighted-average remaining lease term was 11.6 years for the Company’s leases and the weighted-average IBR was 11.7%. The following table summarizes the undiscounted future non-cancellable lease payments under the lease agreements as of December 31, 2024 (in thousands):
December 31, |  | Operating Leases |  |
2025 |  | $ | 12,142 |  |  |
2026 |  | 14,892 |  |  |
2027 |  | 15,278 |  |  |
2028 |  | 15,677 |  |  |
2029 |  | 16,089 |  |  |
Thereafter |  | 93,087 |  |  |
Total undiscounted lease payments |  | $ | 167,165 |  |  |
Less: Imputed Interest |  | (75,460) |  |  |
Total |  | $ | 91,705 |  |  |
Rent expense for the years ended December 31, 2024, and 2023 was $13.3 million and $25.3 million, respectively. Included in rent expense for the years ended December 31, 2024, and 2023 were variable lease costs for utilities, parking, maintenance, and real estate taxes of $2.3 million and $2.4 million, respectively. Cash paid for amounts included in the measurement of lease liabilities was $5.8 million and $7.5 million for the twelve months ended December 31, 2024 and 2023, respectively. During the years ended December 31, 2024 and 2023, the landlord made payments to the subtenant on the Company’s behalf for tenant improvement allowances in the amount of $20.5 million and $5.4 million and the subtenant made rent payments to the landlord on the Company’s behalf in the amount of $6.5 million and $5.5 million, respectively.

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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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