Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2022

Commitments And Contingencies Disclosure [Abstract]

Schedule of Additional Information Related to Operating Leases

The following table contains additional information related to the Company’s operating leases:

Location	Approximate Square Footage	Commencement Dates	Expiration Dates
Seattle, WA	48,086	March 2019 to September 2020	December 2026 to April 2028
Cambridge, MA	59,639	March 2019 to May 2020	November 2025 to February 2028
South San Francisco, CA	66,075	December 2019 to November 2021	April 2024 to April 2030
Fremont, CA	163,193	July 2021	November 2031
Rochester, NY	3,309	January 2022	January 2025

Summary of Lease Costs

The following table summarizes the Company’s lease costs:

		Three Months Ended March 31,
		2022		2021
	(in thousands)
Operating lease cost		$	5,480	$	2,898
Short-term lease cost			-		512
Variable lease cost			1,489		1,087
Total lease cost		$	6,969	$	4,497

Reconciliation of Undiscounted Operating Lease Cash Flows by Fiscal Year to Present Value of Operating Lease Liabilities

The following table reconciles the Company’s undiscounted operating lease cash flows by fiscal year, to the present value of the operating lease liabilities as of March 31, 2022 (in thousands):

2022 (remaining 9 months)		14,964
2023		22,273
2024		21,387
2025		21,236
2026		18,199
2027 and thereafter		81,998
Total undiscounted lease payments		180,057
Less: imputed interest		(64,549	)
Less: tenant improvement allowances		(3,355	)
Present value of operating lease liabilities	$	112,153