The Company is party as a lessee to various non-cancelable operating leases with varying terms through March 2028 primarily for laboratory and office space and equipment. The Company has options to renew some of these leases after their expirations. On a lease-by-lease basis, the Company considers such options, which may be elected at the Company’s sole discretion, in determining the lease term. The Company also has a finance lease acquired in the acquisition of CSI for lab equipment through July 2024, and the Company retains CSI’s classification of its leases. The Company does not have any leases with variable lease payments. The Company’s operating lease agreements do not contain any residual value guarantees, material restrictive covenants, bargain purchase options or asset retirement obligations.

The Company’s headquarters are located in Temple City, California, which is comprised of various corporate offices and a laboratory certified under the Clinical Laboratory Improvement Amendments of 1988, or CLIA, accredited by the College of American Pathologists, or CAP, and licensed by the State of California Department of Public Health. Other CLIA-certified laboratories are located in Houston, Texas and Alpharetta, Georgia. Additional offices are located in Atlanta, Georgia and are used for certain report generation functions.

In February 2021, the Company extended the lease for its headquarters located in Temple City, California, to January 31, 2023. In March 2021, the Company entered into a new lease for its 12,000 square foot CLIA-certified laboratory in Houston, Texas, and the lease will expire in November 2023.

The operating and finance lease right-of-use asset, short-term lease liabilities, and long-term lease liabilities as of September 30, 2021 and December 31, 2020 were as follows:

	September 30,		December 31,
	2021		2020
	(in thousands)
Operating lease ROU asset, net	$	7,502	$	828
Operating lease liabilities, short term	$	1,830	$	267
Operating lease liabilities, long term	$	5,713	$	568
Finance lease ROU asset, net	$	47	$	—
Finance lease liabilities, short term	$	16	$	—
Finance lease liabilities, long term	$	31	$	—

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
	(in thousands)
Operating lease cost	$	429	$	167	$	730	$	468
Finance lease cost:
Amortization of ROU assets		3		—		3		—
Interest on lease liabilities		—		—		—		—
Short-term lease cost		53		56		245		59
Total lease cost	$	485	$	223	$	978	$	527

Supplemental information related to operating leases and finance lease was the following:

The following is a maturity analysis of operating and finance lease liabilities using undiscounted cash flows on an annual basis with renewal periods included:

	Operating Leases			Finance Lease
	(in thousands)
Year Ending December 31,
2021 (remaining 3 months)	$	523		$	5
2022		2,001			17
2023		1,541			17
2024		1,120			10
2025		1,044			—
2026		883			—
Thereafter		1,080			—
Total lease payments		8,192			49
Less imputed interest		(649	)		(2	)
Total	$	7,543		$	47

The Company leases out space in buildings it owns to third-party tenants under noncancelable operating leases and has leased out such space since the Company purchased such buildings in October 2020. The Company also subleases out some space in a lease acquired as part of the acquisition of CSI. As of September 30, 2021, the remaining lease terms left range from 14 months to 47 months including renewal options and may include rent escalation clauses. Lease income primarily represents fixed lease payments from tenants recognized on a straight-line basis over the application lease term. Variable lease income represents tenant payments for real estate taxes, insurance and maintenance.

The lease income was $79,000 and $321,000 for the three and nine months ended September 30, 2021, respectively, which was included in interest and other income, net, in the accompanying Condensed Consolidated Statements of Operations. Total lease income was as follows:

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
	(in thousands)
Lease income	$	78	$	—	$	315	$	—
Variable lease income		1		—		6		—
Total lease income	$	79	$	—	$	321	$	—

Future fixed lease payments from tenants for all noncancelable operating leases as of September 30, 2021 are as follows:

	Lease Payments
	from Tenants
	(in thousands)
Year Ending December 31,
2021 (remaining 3 months)	$	87
2022		356
2023		266
2024		238
2025		120
Total	$	1,067