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Note 23 - Assets Held for Sale - Disposal of Assets Held For Sale (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
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 $ 0 $ 0 $ 5,409