Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Net property, plant and equipment	$ 46,916	$ 48,812
Turkey [Member]
Net property, plant and equipment	17,990	17,990
Texas [Member]
Net property, plant and equipment	9,683	11,518
New Mexico [Member]
Net property, plant and equipment	19,102	19,102
Corporate [Member]
Net property, plant and equipment	141	202
Uranium Plant [Member]
Net property, plant and equipment	8,459	8,653
Uranium Plant [Member] | Turkey [Member]
Net property, plant and equipment
Uranium Plant [Member] | Texas [Member]
Net property, plant and equipment	8,459	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	37,070	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
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	1,387	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	1,224	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	$ 141	$ 202