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Note 19 - Leases - Minimum Lease Payments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Statement Line Items [Line Items] |  |  |
Minimum lease payments | $ 217 | $ 342 |
Finance cost | (9) | (29) |
Present value of lease liabilities | 208 | 313 | $ 465
Not later than one year [member] |  |  |
Statement Line Items [Line Items] |  |  |
Minimum lease payments | 175 | 152 |
Later than one year and not later than two years [member] |  |  |
Statement Line Items [Line Items] |  |  |
Minimum lease payments | 42 | 150 |
Later than two years and not later than three years [member] |  |  |
Statement Line Items [Line Items] |  |  |
Minimum lease payments | $ 0 | $ 40 |

X
- Definition Amount of finance cost on lease accumulated. + References No definition available. + Details
Name: | cmcl_FinanceCostOnLeaseAccumulated
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 undiscounted operating lease payments to be paid. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References No definition available. + Details
Name: | cmcl_UndiscountedOperatingLeasePaymentsToBePaid
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |