7. Leases

Rent expense is recognized on a straight-line basis over the period of the lease taking into account future rent escalation and holiday periods.

Rent expense for the three months ended March 31, 2021 and 2020 was as follows:

	Three months ended March 31,
	2021		2020
Rent expense	$	184	$	187

We occupy a 1,350 square-foot facility in Gainesville, Florida under the terms of an operating lease expiring in February 2023. The Gainesville facility is used primarily to support our research and development activities.

We occupy a 21,443 square-foot facility in Salt Lake City, Utah under the terms of an operating lease expiring in March 2024, with an option to extend for additional five years. The facility supports our principal administrative, sales, marketing, customer support, and research and product development activities.

We occupy a 950 square-foot facility in Austin, Texas under the terms of an operating lease expiring in October 2022. This facility supports our sales, marketing, customer support, and research and development activities.

We occupy a 3,068 square-foot facility in Zaragoza, Spain under the terms of an operating lease expiring in March 2022. This office supports our research and development and customer support activities.

We occupy a 6,175 square-foot facility in Chennai, India under the terms of an operating lease expiring in August 2021. This facility supports our administrative, marketing, customer support, and research and product development activities.

We occupy a 40,000 square-foot warehouse in Salt Lake City, Utah under the terms of an operating lease expiring in April 2025, which serves as our primary inventory fulfillment and repair center.

Supplemental cash flow information related to leases was as follows:

	Three months ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	184	$	180
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—	$	63

Supplemental balance sheet information related to leases was as follows:

	March 31, 2021			December 31, 2020
Operating lease right-of-use assets	$	1,787		$	1,936

Current portion of operating lease liabilities, included in accrued liabilities	$	561		$	579
Operating lease liabilities, net of current portion		1,353			1,489
Total operating lease liabilities	$	1,914		$	2,068

Weighted average remaining lease term for operating leases (in years)		3.33			3.54
Weighted average discount rate for operating leases		6.1	%		6.1	%

The following represents maturities of operating lease liabilities as of March 31, 2021:

Years ending December 31,
2021 (Remainder)	$	504
2022		634
2023		610
2024		306
2025		69
Thereafter		—
Total lease payments		2,123
Less: Imputed interest		209
Total	$	1,914