XML 34 R23.htm IDEA: XBRL DOCUMENT v3.24.3
PROPERTY, PLANT AND EQUIPMENT - Net Book Value of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment $ 136,235 $ 132,400
Mineral rights and properties    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 8,972 8,972
Other property, plant and equipment    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 5,681 5,863
Construction in progress    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 121,582 117,565
Alabama    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 136,221 132,382
Alabama | Mineral rights and properties    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 8,972 8,972
Alabama | Other property, plant and equipment    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 5,667 5,845
Alabama | Construction in progress    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 121,582 117,565
Corporate    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment 14 18
Corporate | Other property, plant and equipment    
PROPERTY, PLANT AND EQUIPMENT    
Total Property, Plant and Equipment $ 14 $ 18