Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Net property, plant and equipment	$ 48,812	$ 32,730
Turkey [Member]
Net property, plant and equipment	17,990
Texas [Member]
Net property, plant and equipment	11,518	$ 12,724
New Mexico [Member]
Net property, plant and equipment	16,996	19,750
Corporate [Member]
Net property, plant and equipment	202	256
Uranium Plant [Member]
Net property, plant and equipment	$ 8,653	$ 8,921
Uranium Plant [Member] | Turkey [Member]
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]
Net property, plant and equipment	$ 8,653	$ 8,921
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	$ 36,477	$ 22,063
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	1,513	$ 2,313
Mineral Rights and Properties [Member] | New Mexico [Member]
Net property, plant and equipment	$ 16,996	$ 19,750
Mineral Rights and Properties [Member] | Corporate [Member]
Net property, plant and equipment
Other Property Plant and Equipment [Member]
Net property, plant and equipment	$ 1,576	$ 1,746
Other Property Plant and Equipment [Member] | Turkey [Member]
Net property, plant and equipment	22
Other Property Plant and Equipment [Member] | Texas [Member]
Net property, plant and equipment	$ 1,352	$ 1,490
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	$ 202	$ 256