Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation

Reconciliation of changes in asset retirement obligation

The following table is a reconciliation of ARO for the years ended December 31, 2021 and 2020 (in thousands):

	Years Ended
	December 31,
	2021		2020
Asset retirement obligation, beginning balance	$	4,313	$	3,958
Accretion expense		387		355
Asset retirement obligation, ending balance	$	4,700	$	4,313