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Note 21 - Assets Held for Sale - Disposal of Assets Held For Sale (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]      
Property, plant and equipment   $ 227  
Trade and other receivables   84  
Total assets   311  
Rehabilitation provision   650  
Trade and other payables   8  
Total liabilities   658  
Cash received   1,000  
Deferred consideration (at January 31, 2019)   1,953  
Total consideration   2,953  
Net liabilities derecognised   347  
Cumulative exchange differences in respect of the net liabilities of the subsidiary reclassified from equity on loss of control of subsidiary   2,109  
Fair value consideration receivable (at January 31, 2019)   2,953  
Profit on sale of subsidiary $ 5,409