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Note 16 - Tax Expense - Unrecognised Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Eersteling Gold Mining Company Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets |  |  | $ 4,989
Caledonia Holdings Zimbabwe (Private) Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | 593 | 421 |
Greenstone Management Services Holdings Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | 376 | 276 | 191
Unused tax losses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | $ 969 | $ 697 | $ 5,180

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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 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + Details
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