Asset retirement obligation (Tables)

12 Months Ended

Dec. 31, 2022

Asset retirement obligation

Asset Retirement Obligation

	2022		2021			2020
ARO balance, beginning of the year	$	22,337	$	22,741		$	21,481
Accretion expense		2,069		2,069			2,069
Change in ARO estimates		168		(2,473	)		-
Costs incurred		-		-			(809	)
ARO balance, end of the year		24,574		22,337			22,741