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 expense (income) divided by the accounting profit. [Refer: Accounting profit]

+ References

+ Details

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- Definition

The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph g
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard
-URIDate 2021-03-24

+ Details

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- Definition

The amount of deferred tax liabilities net of deferred tax assets, when the absolute amount of deferred tax liabilities is greater than the absolute amount of deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

+ References

+ 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

+ Details

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