The Company has elected not to record operating right-of-use assets or operating lease liabilities on its consolidated balance sheet for leases having a minimum term of 12 months or less. Such leases are expensed on a straight-line basis over the lease term. The Company has one operating right-of use asset related to a leased facility in Austin, Texas. The lease commenced in May 2019 and is for a two-year term. The operating right-of-use asset had a balance of $0.1 million as of September 30, 2020

Future minimum lease payments related to the operating lease as of September 30, 2020 were as follows (in thousands):

For fiscal years ending September 30,
2021	$	84
Less interest		(1	)
	$	83

Supplemental cash flow information related to the operating leases is as follows (in thousands):

	YEAR ENDED
	SEPTEMBER 30, 2020
Cash paid for amounts included in the measurement of lease liability	$	165
Right-of-use asset established upon adoption of ASC 842		219

The Company leases equipment to customers primarily for minimum terms of six months or less. The majority of the Company’s rental revenue is generated from its marine-based wireless seismic data acquisition system.

All of the Company’s leasing arrangements as lessor are classified as operating leases except for one sales-type lease at September 30, 2019. The Company had no sales-type leases at September 30, 2020.

The Company regularly evaluates the collectability of its lease receivables on a lease by lease basis. The evaluation primarily consists of reviewing past due account balances and other factors such as the credit quality of the customer, historical trends of the customer and current economic conditions. The Company suspends revenue recognition when the collectability of amounts due are no longer probable and concurrently records a direct write-off of the lease receivable to rental revenue to limit rental revenue recognized to the cash collections received. As of September 30, 2020, the Company had lease receivables from customers, net of reserves, of $9.3 million.

Rental revenue for fiscal years 2020 and 2019 was $53.7 million and $50.0 million, respectively.

At September 30, 2020, the Company had no future minimum lease obligations due from its leasing customers as all equipment leased was on month-to-month terms.

	AS OF SEPTEMBER 30,
	2020			2019
Rental equipment, primarily wireless recording equipment	$	114,783		$	107,645
Accumulated depreciation and impairment		(60,466	)		(45,583	)
	$	54,317		$	62,062

Rental equipment depreciation expense was $17.9 million and $13.7 million in fiscal years 2020 and 2019, respectively.