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LONG-TERM INVESTMENTS (Details) - Talisker Resources Ltd [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Statement Line Items [Line Items]  
Fair Value of long term investments, Beginning Balance $ 10
Net Additions (Disposals) 2,935
Movements in foreign exchange 84
Fair value adjustments for the year 1,282
Fair Value of long term investments, Ending Balance 4,311
Common Shares [Member]  
Statement Line Items [Line Items]  
Fair Value of long term investments, Beginning Balance
Net Additions (Disposals) 2,243
Movements in foreign exchange 63
Fair value adjustments for the year 891
Fair Value of long term investments, Ending Balance 3,197
Warrants [Member]  
Statement Line Items [Line Items]  
Fair Value of long term investments, Beginning Balance
Net Additions (Disposals) 716
Movements in foreign exchange 21
Fair value adjustments for the year 377
Fair Value of long term investments, Ending Balance 1,114
Other long-term investments [Member]  
Statement Line Items [Line Items]  
Fair Value of long term investments, Beginning Balance 10
Net Additions (Disposals) (24)
Movements in foreign exchange
Fair value adjustments for the year 14
Fair Value of long term investments, Ending Balance