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8. INVENTORIES
12 Months Ended
Dec. 31, 2017
Inventories  
INVENTORIES

The inventories balance consists of:

 

        At December 31   At December 31
(in thousands)       2017   2016
             
Uranium concentrates and work-in-progress     $ 419 $ 392
Inventory of ore in stockpiles       1,672   1,562
Mine and mill supplies       2,334   1,989
      $ 4,425 $ 3,943
             
Inventories-by duration:            
Current     $ 2,753 $ 2,381
Long term-ore in stockpiles       1,672   1,562
      $ 4,425 $ 3,943

 

Long-term ore in stockpile inventory represents an estimate of the amount of ore on the stockpile in excess of the next twelve months of planned mill production.