XML 130 R107.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 16 - Tax Expense - Recognised Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax liability | $ (5,412) |  | $ (4,199) |  |
Net deferred tax asset (liability) | (4,147) | [1] | (3,066) | [1] | $ (23,230)
Deferred tax asset | 1,265 |  | 1,133 |  |
Property, plant, and equipment deferred tax liability [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax liability | (5,409) |  | (4,195) |  |
Net deferred tax asset (liability) | (5,409) | [1] | (4,195) | [1] | (24,930)
Allowance for obsolete stock deferred tax asset [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 13 | [1] | 22 | [1] | 258
Deferred tax asset | 13 |  | 22 |  |
Prepayments deferred tax liability [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Deferred tax liability | (3) |  | (4) |  |
Net deferred tax asset (liability) | (3) | [1] | (4) | [1] | (3)
Unrealised foreign exchange gains (losses) [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 530 | [1] | 309 | [1] | 34
Deferred tax asset | 530 |  | 309 |  |
Trade and other payables [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 639 |  | 739 | [1] | 486
Deferred tax asset | 636 |  | 739 |  |
Cash-settled awards [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 8 |  | 5 |  | 13
Deferred tax asset | 8 |  | 5 |  |
Provisions [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 60 | [1] | 58 | [1] | 852
Deferred tax asset | 60 |  | 58 |  |
Other temporary differences [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net deferred tax asset (liability) | 15 |  |  | [1] | $ 60
Deferred tax asset | $ 18 |  |  |  |
[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.

X
- References No definition available. + Details
Name: | cmcl_StatementLineItems
Namespace Prefix: | cmcl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; 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 g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_o&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_56&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_o&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_56&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_PropertyPlantAndEquipmentDeferredTaxLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_AllowanceForObsoleteStockDeferredTaxAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_PrepaymentsDeferredTaxLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnrealisedForeignExchangeGainsLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_TradeAndOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_CashsettledAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_ProvisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_OtherTemporaryDifferencesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |