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Note 17 - Exploration and Evaluation Assets - Exploration and Evaluation Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | $ 17,579 | $ 8,648 |
- Mining claims acquired |  | 73,198 | 7,844 |
- Consumables and drilling |  | 1,005 | 1,206 |
- Contractor |  | 2 | 4 |
- Labour |  | 488 | 308 |
- Power |  | 7 | 36 |
Impairment * |  | 0 | (467) | [1]
Decommissioning asset estimation adjustment |  | 1,618 |  |
- Other |  | 375 |  |
Balance |  | 94,272 | 17,579 |
Bilboes [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 0 | 0 |
- Mining claims acquired |  | 73,198 | 0 |
- Consumables and drilling |  | 0 | 0 |
- Contractor |  | 0 | 0 |
- Labour |  | 0 | 0 |
- Power |  | 0 | 0 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 375 |  |
Balance |  | 73,573 | 0 |
Motapa [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 7,844 | 0 |
- Mining claims acquired |  | 0 | 7,844 |
- Consumables and drilling |  | 903 | 0 |
- Contractor |  | 2 | 0 |
- Labour |  | 377 | 0 |
- Power |  | 0 | 0 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 1,466 |  |
- Other |  | 0 |  |
Balance |  | 10,592 | 7,844 |
Maligreen [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 5,626 | 4,196 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 102 | 1,170 |
- Contractor |  | 0 | 0 |
- Labour |  | 111 | 260 |
- Power |  | 7 | 0 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 152 |  |
- Other |  | 0 |  |
Balance |  | 5,998 | 5,626 |
Connemara North [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 0 | 463 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 0 | 0 |
- Contractor |  | 0 | 4 |
- Labour |  | 0 | 0 |
- Power |  | 0 | 0 |
Impairment * | [1] |  | (467) |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 0 |  |
Balance |  | 0 | 0 |
GG [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 3,723 | 3,618 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 0 | 36 |
- Contractor |  | 0 | 0 |
- Labour |  | 0 | 37 |
- Power |  | 0 | 32 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 0 |  |
Balance |  | 3,723 | 3,723 |
Sabiwa [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 294 | 290 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 0 | 0 |
- Contractor |  | 0 | 0 |
- Labour |  | 0 | 0 |
- Power |  | 0 | 4 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 0 |  |
Balance |  | 294 | 294 |
Abercorn [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 27 | 16 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 0 | 0 |
- Contractor |  | 0 | 0 |
- Labour |  | 0 | 11 |
- Power |  | 0 | 0 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 0 |  |
Balance |  | 27 | 27 |
Valentine [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Balance at beginning of period |  | 65 | 65 |
- Mining claims acquired |  | 0 | 0 |
- Consumables and drilling |  | 0 | 0 |
- Contractor |  | 0 | 0 |
- Labour |  | 0 | 0 |
- Power |  | 0 | 0 |
Impairment * | [1] |  | 0 |
Decommissioning asset estimation adjustment |  | 0 |  |
- Other |  | 0 |  |
Balance |  | $ 65 | $ 65 |
[1] | Caledonia completed sufficient work to establish that the potential orebody at the Connemara North property would not meet Caledonia’s requirements in terms of size, grade and width. Accordingly, Caledonia did not exercise the option to acquire the property. The costs have been impaired to $Nil.

X
- Definition The amount of impairment loss recognised in profit or loss for exploration and evaluation assets. + References No definition available. + Details
Name: | cmcl_ImpairmentLossRecognisedInProfitOrLossExplorationAndEvaluationAssets
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of increase (decrease) in exploration and evaluation assets from consumables and drilling. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromConsumablesAndDrilling
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of increase (decrease) in exploration and evaluation assets from contractor. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromContractor
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in exploration and evaluation assets from decommissioning asset acquired. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromDecommissioningAssetAcquired
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of increase (decrease) in exploration and evaluation assets from labour. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromLabour
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in exploration nd evaluation assets from mining claims acquired. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromMiningClaimsAcquired
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the increase (decrease) in exploration and evaluation assets from other sources. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromOtherSources
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of increase (decrease) in exploration and evaluation assets from power. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseInExplorationAndEvaluationAssetsFromPower
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2023-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2023-en-r&anchor=para_24_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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

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

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