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Note 17 - Tax Expense - Movement in Recognized Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | $ (23,230) | [1] | $ (19,555)
Recognised in profit or loss |  | (2,979) |  | (3,662)
Foreign exchange movement |  | 23,143 |  | (13)
Deferred tax assets (liabilities) | [1] | (3,066) |  | (23,230)
Property, plant, and equipment deferred tax liability [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | (24,930) | [1] | (20,985)
Recognised in profit or loss |  | (4,561) |  | (3,945)
Foreign exchange movement |  | 25,296 |  |
Deferred tax assets (liabilities) | [1] | (4,195) |  | (24,930)
Allowance for obsolete stock deferred tax asset [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 258 | [1] | 35
Recognised in profit or loss |  | 11 |  | 223
Foreign exchange movement |  | (247) |  |
Deferred tax assets (liabilities) | [1] | 22 |  | 258
Prepayments deferred tax liability [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | (3) | [1] | (4)
Recognised in profit or loss |  |  |  |
Foreign exchange movement |  | (1) |  | 1
Deferred tax assets (liabilities) | [1] | (4) |  | (3)
Unrealised foreign exchange gains (losses) [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 34 | [1] | 97
Recognised in profit or loss |  | 519 |  | (63)
Foreign exchange movement |  | (244) |  |
Deferred tax assets (liabilities) | [1] | 309 |  | 34
Trade and other payables [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 486 |  | 429
Recognised in profit or loss |  | 1,093 |  | 57
Foreign exchange movement |  | (840) |  |
Deferred tax assets (liabilities) |  | 739 | [1] | 486
Share-based payments deferred tax assets [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 13 | [1] | 12
Recognised in profit or loss |  | (9) |  | 3
Foreign exchange movement |  | 1 |  | (2)
Deferred tax assets (liabilities) | [1] | 5 |  | 13
Provisions [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 852 |  | 813
Recognised in profit or loss |  | 11 |  | 47
Foreign exchange movement |  | (805) |  | (8)
Deferred tax assets (liabilities) |  | 58 | [1] | 852
Other temporary differences [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Deferred tax assets (liabilities) |  | 12 |  | 48
Recognised in profit or loss |  | (43) |  | 16
Foreign exchange movement |  | (17) |  | (4)
Deferred tax assets (liabilities) |  |  |  | $ 12
[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 2019-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2019-03-27 + Details
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