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Note 17 - Tax Expense (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement Line Items [Line Items] |  |  |
Applicable tax rate | 0.00% | 0.00% | 0.00%
Total average effective tax rate | 39.10% | 37.52% |
Net deferred tax assets | $ 194 | $ 87 |
Net deferred tax liabilities | 8,034 | 4,234 |
South African operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net deferred tax assets | 194 | 87 | $ 63
Zimbabwean operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net deferred tax liabilities | $ 8,034 | $ 4,234 | $ 3,129
Zimbabwean operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Tax rate effect of foreign tax rates | 24.72% | 25.75% |
South African operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Tax rate effect of foreign tax rates | 28.00% | 28.00% |

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2021-03-24 + Details
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