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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Net property, plant and equipment $ 46,883 $ 46,916
Turkey [Member]    
Net property, plant and equipment 17,988 17,990
Texas [Member]    
Net property, plant and equipment 9,579 9,683
New Mexico [Member]    
Net property, plant and equipment 19,102 19,102
Corporate [Member]    
Net property, plant and equipment 214 141
Uranium Plant [Member]    
Net property, plant and equipment 8,447 8,459
Uranium Plant [Member] | Turkey [Member]    
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]    
Net property, plant and equipment 8,447 8,459
Uranium Plant [Member] | New Mexico [Member]    
Net property, plant and equipment
Uranium Plant [Member] | Corporate [Member]    
Net property, plant and equipment
Mineral Rights and Properties [Member]    
Net property, plant and equipment 37,071 37,070
Mineral Rights and Properties [Member] | Turkey [Member]    
Net property, plant and equipment 17,968 17,968
Mineral Rights and Properties [Member] | Texas [Member]    
Net property, plant and equipment
Mineral Rights and Properties [Member] | New Mexico [Member]    
Net property, plant and equipment 19,102 19,102
Mineral Rights and Properties [Member] | Corporate [Member]    
Net property, plant and equipment
Other Property Plant and Equipment [Member]    
Net property, plant and equipment 1,336 1,387
Other Property Plant and Equipment [Member] | Turkey [Member]    
Net property, plant and equipment 20 22
Other Property Plant and Equipment [Member] | Texas [Member]    
Net property, plant and equipment 1,132 1,224
Other Property Plant and Equipment [Member] | New Mexico [Member]    
Net property, plant and equipment
Other Property Plant and Equipment [Member] | Corporate [Member]    
Net property, plant and equipment $ 214 $ 141