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Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Classes Of Inventories [Abstract]  
Schedule of Inventories
20182017
Uranium
Concentrate$255,373$820,426
Broken ore51,54547,083
306,918867,509
NUKEM85,65413,801
Fuel services75,22368,456
Total$467,795$949,766