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Leases | 6 Months Ended
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Jun. 30, 2024
Leases [Abstract] |
Leases | Leases The Company leases office and laboratory space in Monrovia, California under a lease that expires in December 2025 with an option to renew for an additional five years at then market rates. The Company has assessed that it is unlikely to exercise the option to extend the lease term. In June 2021, the Company entered into an Agreement of Lease (Lease Agreement) for laboratory and office space in Pasadena, California, which will expire in July 2035. The Lease Agreement provides for two separate phases of lease and occupancy. The first phase commenced on August 1, 2022 and provides the Company with an improvement allowance up to $17.0 million. The second phase of the lease agreement will commence no later than September 30, 2026 and includes an additional improvement allowance up to $3.3 million. In August 2022, the Company entered into an amendment, which the Company received an additional $5.0 million in tenant improvement allowance in exchange for an increase in the rental rate of the phase 1 space. The Company received delivery of the second phase premises on December 1, 2022. The Company placed the new facility into service in February 2023. In January 2024, the Company entered into an amendment, in which the Company will be paid for $0.7 million of tenant improvement allowance from the second phase for HVAC costs in the first phase. In August 2023, the Company entered into a Sublease Agreement for office space in San Diego, California. The term of the Sublease Agreement begins in September 2023 and ends in December 2027. In connection with the Sublease Agreement, the Company provided a $0.4 million Letter of Credit to the landlord. The Letter of Credit will decline over the term of the lease. The Company also entered into a Cash Collateral Agreement for $0.4 million, which is classified as restricted cash in the Consolidated Balance Sheets. The Company’s lease agreements do not contain any residual value guarantees or restrictive covenants. The following table reconciles the undiscounted cash flows for the operating leases at June 30, 2024 to the operating lease liabilities recorded on the balance sheet (in thousands):
Years ending December 31, |
For the remainder of 2024 | $ | 2,792 |
2025 | 8,022 |
2026 | 9,238 |
2027 | 9,560 |
2028 | 9,076 |
2029 | 9,331 |
Thereafter | 57,104 |
Total undiscounted lease payments | 105,123 |
Less: Tenant allowance | (3,252) |
Less: Imputed interest | (33,453) |
Present value of lease payments | $ | 68,418 |
Lease liabilities - short-term | $ | 1,262 |
Lease liabilities - long-term | 67,156 |
Total lease liabilities | $ | 68,418 |
The following table summarizes lease costs and cash payments for the three and six months ended June 30, 2024 and 2023 (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Operating lease cost | $ | 1,881 |  |  | $ | 2,020 |  |  | $ | 3,762 |  |  | $ | 4,200 |
Variable lease cost | 310 |  |  | 219 |  |  | 1,140 |  |  | 453 |
Total lease costs | $ | 2,191 |  |  | $ | 2,239 |  |  | $ | 4,902 |  |  | $ | 4,653 |
Cash paid for amounts included in the measurement of lease liabilities | $ | 807 |  |  | $ | 721 |  |  | $ | 1,877 |  |  | $ | 1,445 |
As of June 30, 2024, the weighted-average remaining lease term for operating leases is 10.7 years, and the weighted-average discount rate for operating leases is 7.0%. As of June 30, 2023, the weighted-average remaining lease term for operating leases was 11.7 years, and the weighted-average discount rate for operating leases was 8.9%.

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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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