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Leases

3 Months Ended

Mar. 31, 2022

We have operating lease agreements for laboratory, office and warehouse facilities in Seattle, Washington, Bothell, Washington, South San Francisco, California and New York City, New York. As of March 31, 2022, 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, 2022 (in thousands):

2022 (excluding the three months ended March 31, 2022)	$	10,618
2023		13,964
2024		13,692
2025		14,098
2026		12,330
Thereafter		81,188
Total undiscounted lease payments		145,890
Less:
Imputed interest rate		(31,087	)
Tenant improvement receivables		(1,280	)
Total operating lease liabilities		113,523
Less: Current portion		(8,545	)
Operating lease liabilities, less current portion	$	104,978

Cash paid for amounts included in the measurement of lease liabilities was $3.3 million and cash received for tenant improvement allowances was $4.0 million during the three months ended March 31, 2022. During the three months ended March 31, 2021, cash paid for amounts included in the measurement of lease liabilities was $0.5 million, net of $1.2 million of cash received for tenant improvement allowances.

We previously entered into a $2.1 million letter of credit with one of our financial institutions in connection with one of our leases.