Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Net property, plant and equipment	$ 20,553	$ 35,409
Turkey [Member]
Net property, plant and equipment	8	17,979
Texas [Member]
Net property, plant and equipment	3,604	9,413
Alabama [Member]
Net property, plant and equipment	8,973
New Mexico [Member]
Net property, plant and equipment	7,806	7,806
Corporate [Member]
Net property, plant and equipment	162	211
Uranium Plant [Member]
Net property, plant and equipment	3,256	8,304
Uranium Plant [Member] | Turkey [Member]
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]
Net property, plant and equipment	3,256	8,304
Uranium Plant [Member] | Alabama [Member]
Net property, plant and equipment
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	16,779	25,774
Mineral Rights and Properties [Member] | Turkey [Member]
Net property, plant and equipment		17,968
Mineral Rights and Properties [Member] | Texas [Member]
Net property, plant and equipment
Mineral Rights and Properties [Member] | Alabama [Member]
Net property, plant and equipment	8,973
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	518	1,331
Other Property Plant and Equipment [Member] | Turkey [Member]
Net property, plant and equipment	8	11
Other Property Plant and Equipment [Member] | Texas [Member]
Net property, plant and equipment	348	1,109
Other Property Plant and Equipment [Member] | Alabama [Member]
Net property, plant and equipment
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	$ 162	$ 211