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Note 16 - Tax Expense - Unrecognised Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Eersteling Gold Mining Company Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | $ 4,989 | $ 4,989 | $ 4,989
Greenstone Management Services Holdings Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | 191 | 116 |
Unused tax losses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | $ 5,180 | $ 5,105 | $ 4,989

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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
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