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Note 16 - Tax Expense - Movement in Recognised Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | $ (3,066) | [1] | $ (23,230) |
Recognised in profit or loss |  | (5,681) |  | (2,979) |
Foreign exchange movement |  | 4,600 |  | 23,143 |
Deferred tax assets (liabilities) | [1] | (4,147) |  | (3,066) |
Property, plant, and equipment deferred tax liability [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | (4,195) | [1] | (24,930) |
Recognised in profit or loss |  | (7,195) |  | (4,561) |
Foreign exchange movement |  | 5,981 |  | 25,296 |
Deferred tax assets (liabilities) | [1] | (5,409) |  | (4,195) |
Allowance for obsolete stock deferred tax asset [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | 22 | [1] | 258 |
Recognised in profit or loss |  | 14 |  | 11 |
Foreign exchange movement |  | (23) |  | (247) |
Deferred tax assets (liabilities) | [1] | 13 |  | 22 |
Prepayments deferred tax liability [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | (4) | [1] | (3) |
Recognised in profit or loss |  |  |  |  |
Foreign exchange movement |  | 1 |  | (1) |
Deferred tax assets (liabilities) | [1] | (3) |  | (4) |
Unrealised foreign exchange gains (losses) [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | 309 | [1] | 34 |
Recognised in profit or loss |  | 732 |  | 519 |
Foreign exchange movement |  | (511) |  | (244) |
Deferred tax assets (liabilities) | [1] | 530 |  | 309 |
Trade and other payables [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | 739 | [1] | 486 |
Recognised in profit or loss |  | 674 |  | 1,093 |
Foreign exchange movement |  | (774) |  | (840) |
Deferred tax assets (liabilities) |  | 639 |  | 739 | [1]
Cash-settled awards [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | 5 |  | 13 |
Recognised in profit or loss |  | 3 |  | (9) |
Foreign exchange movement |  |  |  | 1 |
Deferred tax assets (liabilities) |  | 8 |  | 5 |
Provisions [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  | 58 | [1] | 852 |
Recognised in profit or loss |  | 76 |  | 11 |
Foreign exchange movement |  | (74) |  | (805) |
Deferred tax assets (liabilities) | [1] | 60 |  | 58 |
Other temporary differences [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax assets (liabilities) |  |  | [1] | 60 |
Recognised in profit or loss |  | 15 |  | (43) |
Foreign exchange movement |  |  |  | (17) |
Deferred tax assets (liabilities) |  | $ 15 |  |  | [1]
[1] | The deferred tax liability consists of a deferred tax asset of $63 (2018: $98) from the South African operation and a net deferred tax liability of $3,129 (2018: $23,328) due to the Zimbabwean operation. The amounts are in different tax jurisdictions and cannot be offset. The amounts are presented as part of Non-current assets and a Non-current liabilities in the Statements of financial position. The deferred tax asset recognised is supported by evidence of probable future taxable income.

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2020-01-01 + Details
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