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PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Summary of Mineral Properties (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]    
Mineral properties $ 119,581 $ 83,539
Sheep Mountain    
Property, Plant and Equipment [Line Items]    
Mineral properties 34,183 34,183
Bahia Project    
Property, Plant and Equipment [Line Items]    
Mineral properties 29,130 0
Nichols Ranch ISR Project    
Property, Plant and Equipment [Line Items]    
Mineral properties 25,974 25,974
Roca Honda    
Property, Plant and Equipment [Line Items]    
Mineral properties 22,095 22,095
Pinyon Plain    
Property, Plant and Equipment [Line Items]    
Mineral properties 6,512 0
Other    
Property, Plant and Equipment [Line Items]    
Mineral properties $ 1,687 $ 1,287