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Leases | 9 Months Ended
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Sep. 30, 2025
Lessee Disclosure [Abstract] |
Leases | # 7. Leases We have operating lease agreements for laboratory, office and warehouse facilities in Seattle, Washington, South San Francisco, California and Bothell, Washington. During the three months ended June 30, 2024, we vacated certain leased space in South San Francisco, California and incurred a related impairment charge. See Note 12, Restructurings for more information. As of September 30, 2025, we were not party to any finance leases. The following table reconciles our undiscounted operating lease cash flows to our operating lease liabilities, less current portion balance on the unaudited condensed consolidated balance sheet as of September 30, 2025 (in thousands):
2025 (excluding the nine months ended September 30, 2025) |  | $ | 3,575 |
2026 |  |  | 12,330 |
2027 |  |  | 11,944 |
2028 |  |  | 12,282 |
2029 |  |  | 12,630 |
Thereafter |  |  | 44,332 |
Total undiscounted lease payments |  |  | 97,093 |
Less: Imputed interest |  |  | (15,290 | )
Total operating lease liabilities |  |  | 81,803 |
Less: Current portion |  |  | (9,442 | )
Operating lease liabilities, less current portion |  | $ | 72,361 |
During the nine months ended September 30, 2025 and 2024, cash paid for amounts included in the measurement of lease liabilities was $10.7 million and $9.7 million, respectively. We have $2.1 million in letters of credit with one of our financial institutions in connection with certain of our leases.

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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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