Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Net property, plant and equipment	$ 34,622	$ 32,730
Uranium Plant [Member]
Net property, plant and equipment	8,841	8,921
Mineral Rights and Properties [Member]
Net property, plant and equipment	24,186	22,063
Vehicles [Member]
Net property, plant and equipment	206	264
Other Property Plant and Equipment [Member]
Net property, plant and equipment	$ 1,389	$ 1,482