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Note 14 - Derivative Financial Instruments - Derivative Financial Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Purchase option [member] |  |
Statement Line Items [Line Items] |  |
Derivative liabilities | $ 0 | $ 0
Gold loan agreement [member] |  |
Statement Line Items [Line Items] |  |
Derivative liabilities | 0 | 0
Call option 1 [member] |  |
Statement Line Items [Line Items] |  |
Derivative liabilities | 0 | 0
Cap and collar options and call options [member] |  |
Statement Line Items [Line Items] |  |
Derivative liabilities | $ 0 | $ 0

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

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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + 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_DerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_PurchaseOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_GoldLoanAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_CallOption1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_CapAndCollarOptionsAndCallOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |