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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2023
Commitments and Contingencies. |
Commitments and Contingencies | 12. Commitments and Contingencies Operating Leases The Company leases office and research and development space under a non-cancelable operating lease in Marina del Rey, CA. The lease commenced on January 1, 2012 and in April 2020, the Company amended the lease (“2020 Lease Amendment”) which, among other things, extended the lease term through December 31, 2031. Base annual rent for calendar year 2022, the first year under the Lease Amendment extended term, was approximately $1.9 million, and base rent increases by 3% annually and will be $2.5 million by the end of the amended term. In addition, the Company received a six-month rent abatement in 2020. In accordance with authoritative guidance, the Company re-measured the lease liability in April 2020 to be $11.7 million using an incremental borrowing rate of 12.89% and related right of use asset was $11.0 million. Concurrent with the Company’s execution of the 2020 Lease Amendment, an irrevocable letter of credit in the amount of $1.2 million was delivered to the landlord. Starting on February 1, 2022, and each year thereafter, the letter of credit will be reduced by 20% of the then outstanding amount. As of December 31, 2023, the letter of credit was $0.7 million. On October 28, 2021, the Company entered into a lease for office and research and development space under a non-cancellable lease in Los Angeles, California (the “2021 Lease”). The 2021 Lease payment start date was May 1, 2022 and the total lease term is for 16 years and runs through 2038. Monthly rent for 2022 and 2023 are fully or partially abated while the lessor and the Company complete planned tenant improvements to the facility. Base monthly rent will be approximately $0.25 million in 2024. The Company is entitled to receive an allowance for tenant improvements of up to $7.3 million, of which the Company received $5.4 million during the year ended December 31, 2023. The Company is responsible for construction costs over such allowance. Out of pocket expenses to be incurred by the Company are considered noncash lease payments, and included in the lease liability and the right-of-use asset when the amount can be reasonably estimated. As of November 16, 2022, the Company finalized the budget to complete the construction of the 2021 Lease. Accordingly, the Company re-measured the lease liability and related right-of-use asset as of November 30, 2022, using an incremental borrowing rate of 11.8%. The re-measured lease liability of the 2021 Lease as of November 16, 2022 was $37.0 million, and the related right of use asset was $33.8 million. During the year ended December 31, 2023, the budget was modified and the Company re-measured the lease liability. As a result, the lease liability and related right-of-use asset increased by approximately $2.7 million, using an incremental borrowing rate of 14.27%. In connection with the 2021 Lease, the Company delivered an irrevocable standby letter of credit in the total amount of $5.0 million to the landlord in 2022. Future minimum annual lease payments under the Company’s noncancelable operating leases as of December 31, 2023, are as follows (in thousands):
​ | ​ | ​ | ​
​ |  | Operating
​ | ​ | Leases
2024 |  | $ | 9,899
2025 | ​ | ​ | 5,307
2026 | ​ | ​ | 5,724
2027 | ​ | ​ | 5,452
2028 | ​ | ​ | 5,616
Thereafter | ​ | ​ | 43,181
Total minimum lease payments | ​ | ​ | 75,179
Plus: estimated short-term variable lease payments | ​ | ​ | 5,386
Less: amount representing interest | ​ | ​ | (31,729)
Present value of operating lease obligations | ​ | ​ | 38,064
Less: current portion | ​ | ​ | (9,481)
Noncurrent operating lease obligations | ​ | $ | 28,583
​ Rent expense was $7.4 million and $6.3 million for the years ended December 31, 2023 and 2022, respectively. Total cash payments for operating leases as included in the consolidated statements of cash flows during the years ended December 31, 2023 and 2022 were $3.5 million and $2.7 million, respectively. ​ Legal Proceedings From time to time, the Company may be involved in disputes, including litigation, relating to claims arising out of operations in the normal course of business. Any of these claims could subject the Company to costly legal expenses and, while management generally believes that there is adequate insurance to cover many different types of liabilities, the Company’s insurance carriers may deny coverage or policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on the consolidated results of operations and financial position. Additionally, any such claims, whether or not successful, could damage the Company’s reputation and business. The Company is currently not a party to any legal proceedings, the adverse outcome of which, in management’s opinion, individually or in the aggregate, would have a material adverse effect on its consolidated results of operations or financial position.

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