Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Net property, plant and equipment	$ 48,730	$ 48,812
Turkey [Member]
Net property, plant and equipment	17,990	17,990
Texas [Member]
Net property, plant and equipment	11,458	11,518
New Mexico [Member]
Net property, plant and equipment	19,102	19,102
Corporate [Member]
Net property, plant and equipment	180	202
Uranium Plant [Member]
Net property, plant and equipment	$ 8,626	$ 8,653
Uranium Plant [Member] | Turkey [Member]
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]
Net property, plant and equipment	$ 8,626	$ 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	$ 38,583	$ 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	1,513	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	$ 1,521	$ 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	$ 1,319	$ 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	$ 180	$ 202