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Note 20 - Provisions (Details Textual) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Provision for decommissioning, restoration and rehabilitation costs for Blanket mine [member] |  |
Statement Line Items [Line Items] |  |
Major assumptions made concerning future events, other provisions, discount rate | 4.19% | 4.14%
Major assumptions made concerning future events, other Provisions, inflation rate | 2.14% | 2.40%
Other provisions, undiscounted cash flows | $ 5,950 | $ 5,629
Provision for decommissioning, restoration and rehabilitation costs for Bilboes Holdings [member] |  |
Statement Line Items [Line Items] |  |
Other provisions, undiscounted cash flows | 4,466 | 4,466
Provision for decommissioning, restoration and rehabilitation costs for Motapa [member] |  |
Statement Line Items [Line Items] |  |
Other provisions, undiscounted cash flows | 567 | 1,466
Provision for decommissioning, restoration and rehabilitation costs for Maligreen [member] |  |
Statement Line Items [Line Items] |  |
Other provisions, undiscounted cash flows | $ 287 | $ 287

X
- Definition The assumed discount rate for the uncertainties relating to the amount or timing of outflows of economic benefits for other provisions. + References No definition available. + Details
Name: | cmcl_MajorAssumptionsMadeConcerningFutureEventsOtherProvisionsDiscountRate
Namespace Prefix: | cmcl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The assumed inflation rate for the uncertainties relating to the amount or timing of outflows of economic benefits for other provisions. + References No definition available. + Details
Name: | cmcl_MajorAssumptionsMadeConcerningFutureEventsOtherProvisionsInflationRate
Namespace Prefix: | cmcl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The undiscounted amount of provisions other than provisions for employee benefits. + References No definition available. + Details
Name: | cmcl_OtherProvisionsUndiscountedCashFlows
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cmcl_ProvisionForDecommissioningRestorationAndRehabilitationCostsForBlanketMineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cmcl_ProvisionForDecommissioningRestorationAndRehabilitationCostsForBilboesHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cmcl_ProvisionForDecommissioningRestorationAndRehabilitationCostsForMotapaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cmcl_ProvisionForDecommissioningRestorationAndRehabilitationCostsForMaligreenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |