Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Net property, plant and equipment	$ 35,375	$ 35,409
Turkey [Member]
Net property, plant and equipment	17,978	17,979
Texas [Member]
Net property, plant and equipment	9,393	9,413
New Mexico [Member]
Net property, plant and equipment	7,806	7,806
Corporate [Member]
Net property, plant and equipment	198	211
Uranium Plant [Member]
Net property, plant and equipment	8,304	8,304
Uranium Plant [Member] | Turkey [Member]
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]
Net property, plant and equipment	8,304	8,304
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	25,774	25,774
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	7,806	7,806
Mineral Rights and Properties [Member] | Corporate [Member]
Net property, plant and equipment
Other Property Plant and Equipment [Member]
Net property, plant and equipment	1,297	1,331
Other Property Plant and Equipment [Member] | Turkey [Member]
Net property, plant and equipment	10	11
Other Property Plant and Equipment [Member] | Texas [Member]
Net property, plant and equipment	1,089	1,109
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	$ 198	$ 211