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Note 13 - Other Expenses (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]      
COVID-19 Donations expenses [1] $ 1,322
ZIMBABWE      
Statement Line Items [Line Items]      
COVID-19 Donations expenses 840    
Gwanda [member]      
Statement Line Items [Line Items]      
COVID-19 Donations expenses $ 482    
[1] Blanket Mine donated $840 towards the Zimbabwean Ministry of Mines and Development and $482 towards a clinic in Gwanda, in helping to curb the spread of COVID-19 and the impacts thereof.