XML 48 R35.htm IDEA: XBRL DOCUMENT v3.23.3
PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]    
Cost $ 55,393 $ 45,836
Accumulated Depreciation (35,185) (33,174)
Net Book Value 20,208 12,662
Nichols Ranch    
Property, Plant and Equipment [Line Items]    
Cost 29,210 29,210
Accumulated Depreciation (21,747) (20,221)
Net Book Value 7,463 8,989
Alta Mesa(1)    
Property, Plant and Equipment [Line Items]    
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment   8,210
Pinyon Plain    
Property, Plant and Equipment [Line Items]    
Cost 3,288 1,617
Accumulated Depreciation (846) (714)
Net Book Value 2,442 903
Equipment and other    
Property, Plant and Equipment [Line Items]    
Cost 22,895 15,009
Accumulated Depreciation (12,592) (12,239)
Net Book Value $ 10,303 $ 2,770