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Note 19 - Leases - Financial Statement Amounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Statement Line Items [Line Items] |  |  |
Finance cost on lease liabilities (note 15) | $ 22 | $ 31 | $ 24
Unrealised foreign exchange gain | (5) | 19 | 1
Depreciation (note 18) | 124 | 137 | 115
Lease expense | 141 | 187 | 140
Total cash outflow for leases - principal | 162 | 119 | 105
Total cash outflow for leases - finance cost | (22) | (31) | (24)
Total cash outflow for leases - payments | $ 184 | $ 150 | $ 129

X
- Definition Adjustments for unrealised foreign exchange losses (gains) related to leases to reconcile profit (loss) to net cash flow from (used in) operating activities. + References No definition available. + Details
Name: | cmcl_AdjustmentsForUnrealisedForeignExchangeLossesGainsRelatedToLeases
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The principal cash outflow for leases. + References No definition available. + Details
Name: | cmcl_CashOutflowForLeasesPrincipal
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of cash payment for leases. + References No definition available. + Details
Name: | cmcl_CashPaymentForLeases
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for interest paid related to lease liabilities. + References No definition available. + Details
Name: | cmcl_InterestPaidRelatedToLeaseLiabilities
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of recognized lease expense. + References No definition available. + Details
Name: | cmcl_LeaseExpense
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_DepreciationRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of interest expense on lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_InterestExpenseOnLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration