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Note 13 - Administrative Expense - Components of Administrative Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
Investor relations $ 751 $ 541 $ 543
Audit fee 266 231 267
Advisory services fee 553 684 2,266
Listing fees 495 402 328
Directors fees company 225 247 211
Directors fees Blanket Mine 52 40 48
Employee costs 2,917 2,781 2,803
Eersteling Gold Mine administration cost 212 142 111
Office costs - Zambia 17
Other office administration costs 697 444 185
Travel costs 297 399 484
$ 6,465 $ 5,911 [1] $ 7,263
[1] Restated, refer note 4(a).