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Inventories (Tables)
12 Months Ended
Dec. 31, 2017
Classes Of Inventories [Abstract]  
Schedule of Inventories
20172016
Uranium
Concentrate$820,426$989,202
Broken ore47,08345,581
867,5091,034,783
NUKEM13,801141,040
Fuel services68,456112,116
Total$949,766$1,287,939