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Note 14 - Derivative Financial Instruments - Derivative Financial Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Statement Line Items [Line Items] |  |
Derivative financial assets | $ 0 | $ 1,184
Gold exchange traded fund [member] |  |
Statement Line Items [Line Items] |  |
Derivative financial assets |  | 1,184
Gold hedge [member] |  |
Statement Line Items [Line Items] |  |
Derivative financial assets |  | $ 0

X
- 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 assets 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_DerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_TypesOfFinancialAssetsAxis=cmcl_GoldExchangeTradedFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfFinancialAssetsAxis=cmcl_GoldHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |