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Note 5 - Tribute Arrangement and Mining Agreement and Bilboes Gold Limited Acquisition - Consideration Paid (Details) (Parentheticals) - Assets of Bilboes Gold Limited [member] - $ / shares | Jan. 06, 2023 | Apr. 11, 2023 | Mar. 30, 2023
--- | --- | --- | ---
Statement Line Items [Line Items] |  |  |
Initial consideration shares issued (in shares) | 4,425,797 |  |
Initial consideration shares issued, price per share (in dollars per share) | $ 12.82 |  |
Escrow shares issued (in shares) | 441,095 |  | 441,095
Deferred consideration shares issued (in shares) | 256,152 | 256,152 |

X
- Definition Number of shares for deferred consideration issuable for acquisition. + References No definition available. + Details
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Namespace Prefix: | cmcl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issuable for escrow for acquisition. + References No definition available. + Details
Name: | cmcl_AcquisitionEscrowSharesIssuable
Namespace Prefix: | cmcl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares issued in an acquisition. + References No definition available. + Details
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Namespace Prefix: | cmcl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or per unit price of shares issued or issuable. + References No definition available. + Details
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Namespace Prefix: | cmcl_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cmcl_AssetsOfBilboesGoldLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |