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Note 14 - Derivative Financial Instruments - Derivative Financial Liabilities (Details) $ in Thousands | Dec. 31, 2021 USD ($)
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Statement Line Items [Line Items] |
Derivative liabilities | $ 3,095
Gold loan agreement [member] |
Statement Line Items [Line Items] |
Derivative liabilities | 2,866
Call option [member] |
Statement Line Items [Line Items] |
Derivative liabilities | 229
Cap and collar options and call options [member] |
Statement Line Items [Line Items] |
Derivative liabilities | $ 0

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- References No definition available. + Details
Name: | cmcl_StatementLineItems
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 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + 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_GoldLoanAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_CallOptionMember
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: |