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Note 16 - Prepayments - Schedule of Prepayments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Statement Line Items [Line Items] |  |
Other prepayments | $ 327 | $ 265
Current prepayments and other current assets | 6,717 | 2,538
South African operations [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 1,398 | 527
Zimbabwean operations [member] | Currency, USD [member] | Blanket Mine [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 2,196 | 808
Zimbabwean operations [member] | Currency, Zimbabwe Gold (ZiG) [member] | Blanket Mine [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 2,796 | 0
Zimbabwean operations [member] | Currency, Zimbabwe RTGS [member] | Blanket Mine [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | $ 0 | $ 938

X
- Definition Amount of other prepayments. + References No definition available. + Details
Name: | cmcl_OtherPrepayments
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cmcl_Statement1LineItems
Namespace Prefix: | cmcl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of current advances made to suppliers before goods or services are received. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of current prepayments and other current assets. [Refer: Other current assets; Current prepayments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=cmcl_SouthAfricanOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=cmcl_ZimbabweanOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=cmcl_CurrencyUSDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cmcl_BlanketMineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=cmcl_CurrencyZimbabweGoldZiGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=cmcl_CurrencyZimbabweRTGSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |