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 June 30, 2024, 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 as of June 30, 2024 (in thousands):


2024 (excluding the six months ended June 30, 2024)	$	6,889
2025		14,098
2026		12,330
2027		11,944
2028		12,282
Thereafter		56,962
Total undiscounted lease payments		114,505
Less: Imputed interest rate		(20,329	)
Total operating lease liabilities		94,176
Less: Current portion		(9,806	)
Operating lease liabilities, less current portion	$	84,370

During the six months ended June 30, 2024 and 2023, cash paid for amounts included in the measurement of lease liabilities was $7.0 million and $6.9 million, respectively.

We have $2.1 million in letters of credit with one of our financial institutions in connection with certain of our leases.