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Note 22 - Prepayments - Schedule of Prepayments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Statement Line Items [Line Items] |  |
Solar prepayments | $ 0 | $ 104
Other prepayments | 265 | 162
Current prepayments and other current assets | 2,538 | 3,693
South African operations [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 527 | 254
Zimbabwean operations [member] | Blanket Mine [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 1,746 | 1,494
Zimbabwean operations [member] | Bilboes [member] |  |
Statement Line Items [Line Items] |  |
Suppliers | 0 | 802
Bilboes pre-effective date costs | $ 0 | $ 877

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

X
- Definition The amount of prepayments of property, plant and equipment + References No definition available. + Details
Name: | cmcl_PrepaymentsOfPropertyPlantAndEquipment
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 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentAdvancesToSuppliers
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 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets
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_ClassesOfPropertyPlantAndEquipmentAxis=cmcl_BlanketMineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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