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Note 23 - Assets Held for Sale - Noncurrent Assets Held for Sale (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Statement Line Items [Line Items]    
Non-current assets held for sale $ 0 $ 500
Eagle Vulture, Mascot and Penzance [member]    
Statement Line Items [Line Items]    
Non-current assets held for sale   500
Eersteling Gold Mining Company Limited [member]    
Statement Line Items [Line Items]    
Non-current assets held for sale   $ 0