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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Net property, plant and equipment $ 48,093 $ 48,812
Turkey [Member]    
Net property, plant and equipment 17,990 17,990
Texas [Member]    
Net property, plant and equipment 10,857 11,518
New Mexico [Member]    
Net property, plant and equipment 19,102 19,102
Corporate [Member]    
Net property, plant and equipment 144 202
Uranium Plant [Member]    
Net property, plant and equipment 8,621 8,653
Uranium Plant [Member] | Turkey [Member]    
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]    
Net property, plant and equipment 8,621 8,653
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 38,049 38,583
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 979 1,513
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 1,423 1,576
Other Property Plant and Equipment [Member] | Turkey [Member]    
Net property, plant and equipment 22 22
Other Property Plant and Equipment [Member] | Texas [Member]    
Net property, plant and equipment 1,257 1,352
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 $ 144 $ 202