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INCOME TAXES (Details 4) - Unrecognized deductible temporary differences [Member] - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Statement [Line Items]    
Tax losses carried forward $ 18,974 $ 24,229
Share issue costs 1,144 1,352
Plant, equipment and mining properties 263 170
Capitalized to exploration and evaluation assets 1,248 1,237
Investments (400) (1,273)
Reclamation provision 0 0
Unrecognized deductible temporary differences $ 21,229 $ 25,715