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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2019
Inventories Tables Abstract  
Inventories
        At December 31   At December 31
(in thousands)       2019   2018
             
Uranium concentrates     $ 526 $ 526
Inventory of ore in stockpiles       2,098   2,098
Mine and mill supplies in MLJV       2,826   3,058
      $ 5,450 $ 5,682
             
Inventories-by balance sheet presentation:            
Current     $ 3,352 $ 3,584
Long term-ore in stockpiles       2,098   2,098
      $ 5,450 $ 5,682