We have entered into various non–cancellable operating lease agreements for certain of our offices, shop and warehouse facilities, equipment and vehicles. We determine if an arrangement is a lease, or contains a lease, at inception and record the lease in our unaudited condensed consolidated financial statements upon lease commencement, which is the date when the underlying asset is made available for use by the lessor.

Our leases have remaining lease terms ranging from one year to seven years and often include options to extend the lease term for up to three years. Some of our leases also include options to terminate the lease prior to the end of the agreed upon lease term. For the majority of leases entered into during the current period, we have concluded it is not reasonably certain that we would exercise the options to extend the lease. Therefore, as of the lease commencement date, our lease terms generally do not include these options. We include options to extend the lease when it is reasonably certain that we will exercise that option.

Lease expense for operating lease payments is recognized on a straight–line basis over the lease term. Certain operating leases provide for annual increases to lease payments based on an index or rate. We estimate the annual increase in lease payments based on the index or rate at the lease commencement date. Differences between the estimated lease payment and actual payment are expensed as incurred. Lease expense for finance lease payments is recognized as amortization expense of the finance lease ROU asset and interest expense on the finance lease liability over the lease term.

The balances for the operating and finance leases where we are the lessee are presented on our unaudited condensed consolidated balance sheet as follows:

	Classification on Unaudited Condensed Consolidated Balance Sheet	September 30, 2020		December 31, 2019
Assets:
Operating lease right-of-use assets	Operating lease right-of-use assets	$	5,505	$	6,421
Finance lease assets	Property and equipment, net		—		324
Total lease assets		$	5,505	$	6,745

Liabilities:
Current:
Operating lease liabilities	Operating lease liabilities	$	1,517	$	2,576
Finance lease liabilities	Current portion of long-term debt and finance leases		—		350
Long-term - operating lease liabilities	Other long-term liabilities		4,107		3,980
Total lease liabilities		$	5,624	$	6,906

The components of lease expense on our unaudited condensed consolidated statement of operations are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating lease expense:
Operating lease expense ⁽¹⁾	$	696	$	1,294	$	3,103	$	3,958

Finance lease expense:
Amortization of leased assets	$	—	$	221	$	324	$	664
Interest on lease liabilities		—		24		10		93
Total finance lease expense	$	—	$	245	$	334	$	757

Total lease expense	$	696	$	1,539	$	3,437	$	4,715

⁽¹⁾	Includes short–term leases and variable lease costs, both of which are immaterial.

As of September 30, 2020, our operating leases have a weighted average remaining lease term of 3.9 years and a weighted average discount rate of 13.0%.

Supplemental cash flows information related to leases where we are the lessee is as follows for the nine months ended September 30:

	2020		2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,337	$	2,583
Operating cash flows from finance leases		10		93
Financing cash flows from finance leases		350		652

Operating lease right-of-use assets obtained in exchange for new operating lease liabilities		744		162

As of September 30, 2020, the maturities of the liabilities related to our operating leases are as follows:

Three months ended December 31, 2020	$	549
2021		1,958
2022		1,615
2023		1,461
2024		1,002
Thereafter		613
Total minimum lease payments		7,198
Less interest		1,574
Present value of lease liabilities		5,624
Less current lease liabilities		1,517
Long-term lease liabilities	$	4,107