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Note 14 - Trade and Other Receivables - Components of Trade and Other Receivables (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Statement Line Items [Line Items]    
Bullion sales receivable $ 4,027 $ 2,987
VAT receivables 1,169 1,765
Deferred consideration on the disposal of subsidiary 1,099 1,991
Deposits for stores and equipment and other receivables 875 169
Total trade and other current receivables $ 7,170 $ 6,912