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SUPPLEMENTAL DISCLOSURE WITH RESPECT TO CASH FLOWS (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Cash Flow Statement Explanatory [Line Items]      
Adjustments for decrease (increase) in other current assets $ 0 $ 33,901  
Amount of common shares issued related to property agreements $ 477 $ 352  
Issuance of common shares related to property agreements 0 12,323,048  
Reclass of AOCI on disposal of FVOCI investment $ 0 $ (677)  
Issuance of common shares related to property agreements 211,795 114,785  
Currency translation adjustment $ 5,930 $ 898  
CTA gain (loss) on royalty interest 1,031 (288)  
CTA gain (loss) on deferred tax asset 0 32  
CTA gain (loss) in the net assets of a subsidiary 4,866 1,216  
Issuance of share capital 193,006 181,857 $ 127,823
Gain on deferred tax liabilities $ 33 $ 2  
Number of shares issued under restricted share unit plan 171,063 232,750  
Value of shares issued under restricted share unit plan $ 402 $ 146  
Shares issued for private placements 10,000 17,241  
Capital stock [Member]      
Disclosure Of Cash Flow Statement Explanatory [Line Items]      
Reclass of reserves on exercise of options 602 641  
Loans payable 0 7,848  
Value of shares issued under restricted share unit plan 402 146  
Shares issued for private placements 8,670 17,190  
Accumulated other comprehensive income [Member]      
Disclosure Of Cash Flow Statement Explanatory [Line Items]      
Reclass of AOCI on disposal of FVOCI investment 0 677  
Warrants [Member]      
Disclosure Of Cash Flow Statement Explanatory [Line Items]      
Shares issued for private placements $ 1,330 $ 51  
Restricted Share Unit Plan [Member]      
Disclosure Of Cash Flow Statement Explanatory [Line Items]      
Number of shares issued under restricted share unit plan 171,063 225,750  
Value of shares issued under restricted share unit plan $ 402 $ 146