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PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Cost	$ 59,360	$ 57,915
Accumulated Depreciation	(38,461)	(35,932)
Net Book Value	20,899	21,983
Nichols Ranch
Property, Plant and Equipment [Line Items]
Cost	29,210	29,210
Accumulated Depreciation	(19,712)	(18,185)
Net Book Value	9,498	11,025
Alta Mesa
Property, Plant and Equipment [Line Items]
Cost	13,626	13,626
Accumulated Depreciation	(5,678)	(4,996)
Net Book Value	7,948	8,630
Equipment and other
Property, Plant and Equipment [Line Items]
Cost	16,524	15,079
Accumulated Depreciation	(13,071)	(12,751)
Net Book Value	$ 3,453	$ 2,328

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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