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Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligations

Summary of long-term asset retirement obligations

​

​	​	​	​	​	​	​
​		December 31,			December 31,
​	​	2022		​	2021
​	​	​	​	​	​	​
Refinery	​	$	1,790	​	$	1,336
Ontario Mineral Properties (Note 8)	​		—	​		338
Long-term Asset Retirement Obligations	​	$	1,790	​	$	1,674

​

Summary of continuity of the asset retirement obligation

​

​	​	​	​
​		Total ARO
Balance at January 1, 2021	​	$	1,264
Change in estimate of discounted cash flows	​		410
Balance at December 31, 2021	​		1,674
Change in estimate from discounting	​		(274)
Change in estimate of costs	​		728
Transferred to liabilities held for sale (Note 8)	​		(338)
Balance at December 31, 2022	​	$	1,790

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Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

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