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Note 19 - Trade and Other Receivables - Components of Trade and Other Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Bullion revenue receivable $ 2,695 $ 1,386
VAT receivables 2,743 2,947
Deposits for stores and equipment and other receivables 954 629
$ 6,392 $ 4,962