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PROPERTY, PLANT AND EQUIPMENT - Net Book Value of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Net property, plant and equipment $ 20,337 $ 20,553
Turkey    
Net property, plant and equipment 6 8
Texas    
Net property, plant and equipment 3,439 3,604
Alabama    
Net property, plant and equipment 8,972 8,973
New Mexico    
Net property, plant and equipment 7,806 7,806
Corporate    
Net property, plant and equipment 114 162
Uranium Plant    
Net property, plant and equipment 3,112 3,256
Uranium Plant | Turkey    
Net property, plant and equipment
Uranium Plant | Texas    
Net property, plant and equipment 3,112 3,256
Uranium Plant | Alabama    
Net property, plant and equipment
Uranium Plant | New Mexico    
Net property, plant and equipment
Uranium Plant | Corporate    
Net property, plant and equipment  
Mineral Rights and Properties    
Net property, plant and equipment 16,778 16,779
Mineral Rights and Properties | Turkey    
Net property, plant and equipment
Mineral Rights and Properties | Texas    
Net property, plant and equipment
Mineral Rights and Properties | Alabama    
Net property, plant and equipment 8,972 8,973
Mineral Rights and Properties | New Mexico    
Net property, plant and equipment 7,806 7,806
Mineral Rights and Properties | Corporate    
Net property, plant and equipment  
Other Property Plant and Equipment    
Net property, plant and equipment 447 518
Other Property Plant and Equipment | Turkey    
Net property, plant and equipment 6 8
Other Property Plant and Equipment | Texas    
Net property, plant and equipment 327 348
Other Property Plant and Equipment | Alabama    
Net property, plant and equipment
Other Property Plant and Equipment | New Mexico    
Net property, plant and equipment
Other Property Plant and Equipment | Corporate    
Net property, plant and equipment $ 114 $ 162