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INVENTORIES (Details) - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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DisclosureOfInventoriesLineItems [Line Items] |  |  |
Current inventories | $ 3,584 | $ 3,454 | $ 3,196
Noncurrent inventories | 2,098 | 2,098 | 2,098
Total inventories | 5,682 | 5,552 | 5,294
Uranium concentrates |  |  |
DisclosureOfInventoriesLineItems [Line Items] |  |  |
Total inventories | 526 | 526 | 526
Inventory of ore in stockpiles |  |  |
DisclosureOfInventoriesLineItems [Line Items] |  |  |
Total inventories | 2,098 | 2,098 | 2,098
Mine and mill supplies |  |  |
DisclosureOfInventoriesLineItems [Line Items] |  |  |
Total inventories | $ 3,058 | $ 2,928 | $ 2,670

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