Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Net property, plant and equipment	$ 32,574	$ 32,730
Uranium Plant [Member]
Net property, plant and equipment	8,867	8,921
Mineral Rights and Properties [Member]
Net property, plant and equipment	22,063	22,063
Vehicles [Member]
Net property, plant and equipment	225	264
Other Property Plant and Equipment [Member]
Net property, plant and equipment	$ 1,419	$ 1,482