We have operating lease agreements for laboratory, office and warehouse facilities in Seattle, Washington, South San Francisco, California and Bothell, Washington. As of March 31, 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 March 31, 2024 (in thousands):


2024 (excluding the three months ended March 31, 2024)	$	10,297
2025		14,098
2026		12,330
2027		11,944
2028		12,282
Thereafter		56,962
Total undiscounted lease payments		117,913
Less: Imputed interest rate		(21,419	)
Total operating lease liabilities		96,494
Less: Current portion		(9,594	)
Operating lease liabilities, less current portion	$	86,900

During the three months ended March 31, 2024 and 2023, cash paid for amounts included in the measurement of lease liabilities was $3.7 million and $3.4 million, respectively.

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