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Note 15 - Finance Income and Finance Cost (Details Textual) | Apr. 30, 2021
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Zimbabwe Electricity Supply Authority (“ZESA”) [member] |
Statement Line Items [Line Items] |
Foreign currency allocation, paid to counterparty, percentage | 60.00%

X
- Definition The percentage of proceeds to be paid to counterparty in foreign currency. + References No definition available. + Details
Name: | cmcl_ForeignCurrencyAllocationPaidToCounterpartyPercentage
Namespace Prefix: | cmcl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | ifrs-full_CounterpartiesAxis=cmcl_ZimbabweElectricitySupplyAuthorityZesaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |