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ROYALTY AND OTHER PROPERTY INTERESTS - Disclosure of detailed information about royalty interests (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | $ 15,034 | $ 15,959
Additions | 5,800 | 626
Recoveries | (1,006) | (133)
Depletion | (1,123) | (802)
Cumulative translation adjustments | (209) | (616)
Royalty and Other Property Interests, ending balance | 18,496 | 15,034
Leeville [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Depletion | (1,123) | (802)
Corvus [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 350 |
Royalty and Other Property Interests, ending balance |  | 350
Millrock [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 210 |
Royalty and Other Property Interests, ending balance |  | 210
Royalty interest [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 13,488 | 14,346
Additions | 2,092 | 560
Recoveries | 0 | 0
Depletion | (1,123) | (802)
Cumulative translation adjustments | (209) | (616)
Royalty and Other Property Interests, ending balance | 14,248 | 13,488
Royalty interest [Member] | USA [Member] | Leeville [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 12,583 | 14,001
Additions | 0 | 0
Recoveries | 0 | 0
Depletion | (1,123) | (802)
Cumulative translation adjustments | (209) | (616)
Royalty and Other Property Interests, ending balance | 11,251 | 12,583
Royalty interest [Member] | USA [Member] | Afgan [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 145 | 145
Additions | 0 | 0
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 145 | 145
Royalty interest [Member] | USA [Member] | Corvus [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 350 | 0
Additions | 0 | 350
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 350 | 350
Royalty interest [Member] | USA [Member] | Millrock [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 210 | 0
Additions | 0 | 210
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 210 | 210
Royalty interest [Member] | Canada [Member] | Frontline Portfolio [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 0 |
Additions | 148 |
Recoveries | 0 |
Depletion | 0 |
Cumulative translation adjustments | 0 |
Royalty and Other Property Interests, ending balance | 148 | 0
Royalty interest [Member] | Chile [Member] | Revelo Portfolio [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 0 |
Additions | 1,684 |
Recoveries | 0 |
Depletion | 0 |
Cumulative translation adjustments | 0 |
Royalty and Other Property Interests, ending balance | 1,684 | 0
Royalty interest [Member] | Finland [Member] | Kaukua Royalty Interests [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 0 |
Additions | 260 |
Recoveries | 0 |
Depletion | 0 |
Cumulative translation adjustments | 0 |
Royalty and Other Property Interests, ending balance | 260 | 0
Royalty interest [Member] | Serbia [Member] | Timok [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 200 | 200
Additions | 0 | 0
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 200 | 200
Other Property Interests [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 1,546 | 1,613
Additions | 3,708 | 66
Recoveries | (1,006) | (133)
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 4,248 | 1,546
Other Property Interests [Member] | USA [Member] | Superior West [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 603 | 736
Additions | 0 | 0
Recoveries | (139) | (133)
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 464 | 603
Other Property Interests [Member] | USA [Member] | Yerington West, Nevada [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 206 | 206
Additions | 0 | 0
Recoveries | (64) | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 142 | 206
Other Property Interests [Member] | USA [Member] | Mainspring [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 66 | 0
Additions | 66 | 66
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 132 | 66
Other Property Interests [Member] | Canada [Member] | Frontline Portfolio [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 0 |
Additions | 651 |
Recoveries | 0 |
Depletion | 0 |
Cumulative translation adjustments | 0 |
Royalty and Other Property Interests, ending balance | 651 | 0
Other Property Interests [Member] | Canada [Member] | Perry Portfolio [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 0 |
Additions | 2,991 |
Recoveries | (570) |
Depletion | 0 |
Cumulative translation adjustments | 0 |
Royalty and Other Property Interests, ending balance | 2,421 | 0
Other Property Interests [Member] | Sweden [Member] | Viad [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 421 | 421
Additions | 0 | 0
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 421 | 421
Other Property Interests [Member] | Sweden [Member] | Various [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 17 | 17
Additions | 0 | 0
Recoveries | 0 | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 17 | 17
Other Property Interests [Member] | Turkey [Member] | Alankoy [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 154 | 154
Additions | 0 | 0
Recoveries | (154) | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | 0 | 154
Other Property Interests [Member] | Turkey [Member] | Trab [Member] |  |
Categories Of Royalty And Other Property Interests [Line Items] |  |
Royalty and Other Property Interests, beginning balance | 79 | 79
Additions | 0 | 0
Recoveries | (79) | 0
Depletion | 0 | 0
Cumulative translation adjustments | 0 | 0
Royalty and Other Property Interests, ending balance | $ 0 | $ 79

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