The mass of call options issued.

No definition available.

Name:	cmcl_CallOptionsMass
Namespace Prefix:	cmcl_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of ounces hedged in a derivative contract.

+ References

No definition available.

+ Details

Name:	cmcl_DerivativeContractNumberOfOuncesOfGoldHedged
Namespace Prefix:	cmcl_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The cap of hedging contract.

+ References

No definition available.

+ Details

Name:	cmcl_HedgingContractCap
Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The collar of hedging contract.

+ References

No definition available.

+ Details

Name:	cmcl_HedgingContractCollar
Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

the number of ounces of gold hedged per month by hedging instrument.

+ References

No definition available.

+ Details

Name:	cmcl_HedgingInstrumentOuncesOfGoldHedgedPerMonth
Namespace Prefix:	cmcl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The company would be protected if the market price of hedging assets dip below such price.

+ References

No definition available.

+ Details

Name:	cmcl_HedgingInstrumentsProtectedPrice
Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of agreements.

+ References

No definition available.

+ Details

Name:	cmcl_NumberOfAgreements
Namespace Prefix:	cmcl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of deliveries.

+ References

No definition available.

+ Details

Name:	cmcl_NumberOfDeliveries
Namespace Prefix:	cmcl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of cash inflow from derivative financial liabilities.

+ References

No definition available.

+ Details

Name:	cmcl_ProceedsFromDerivativeFinancialLiabilities
Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The mass of each delivery to repay the gold loan.

+ References

No definition available.

+ Details

Name:	cmcl_RepaymentGoldLoanDeliveryMassOfEach
Namespace Prefix:	cmcl_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	cmcl_StatementLineItems
Namespace Prefix:	cmcl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The strike price per ounce.

+ References

No definition available.

+ Details

Name:	cmcl_StrikePricePerOunce
Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The term of a derivative contract.

+ References

No definition available.

+ Details

Name:	cmcl_TermOfDerivativeContract
Namespace Prefix:	cmcl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_25&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_FinancialLiabilitiesAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 24A
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24A_a&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_HedgingInstrumentLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_CounterpartiesAxis=cmcl_AurametInternationalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_GoldLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialLiabilitiesAxis=cmcl_CallOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfHedgesAxis=cmcl_PutOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfHedgesAxis=cmcl_ZeroCostContractToHedge20000OuncesOfGoldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfHedgesAxis=cmcl_CallOptionsToHedgeOuncesOfGoldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cmcl_AurametInternationalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_AbnormallyLargeChangesInAssetPricesOrForeignExchangeRatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 14 - Derivative Financial Instruments (Details Textual)					1 Months Ended
	Dec. 22, 2022 USD ($)	Mar. 09, 2022 USD ($)	Feb. 17, 2022 USD ($)	Dec. 13, 2021 USD ($) oz	Apr. 30, 2022 USD ($)	Jul. 31, 2022 USD ($)	May 31, 2022 USD ($)	Mar. 31, 2022 USD ($)
Auramet International LLC [Member]
Statement Line Items [Line Items]
Number of Agreements				2
Auramet International LLC [Member] \| Gold loan agreement [member]
Statement Line Items [Line Items]
Proceeds from derivative financial liabilities				$ 3,000,000
Number of Deliveries				2
Repayment gold loan, delivery mass of each (Ounce) \| oz				925
Financial liabilities, at fair value								$ 1,833,000
Auramet International LLC [Member] \| Call option [member]
Statement Line Items [Line Items]
Call options, mass (Ounce) \| oz				6,000
Strike price per ounce				$ 2,000
Put option [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged	16,672
Hedging instruments, protected, price	$ 1,750
Zero cost contract to hedge 20,000 ounces of gold [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged			20,000
Term of derivative contract (Month)			5 months
Hedging contract, cap			$ 1,940
Hedging contract, collar			$ 1,825
Hedging instrument, ounces of gold hedged per month			4,000
Call options to hedge ounces of gold [member]
Statement Line Items [Line Items]
Strike price per ounce					$ 1,959.50
Hedging instrument, ounces of gold hedged per month		4,000			2,400
Hedging instrument, liabilities		$ 796			$ 176
Call options to hedge ounces of gold [member] \| Auramet International LLC [Member]
Statement Line Items [Line Items]
Strike price per ounce					$ 1,886
Hedging instrument, ounces of gold hedged per month					2,400
Hedging instrument, liabilities					$ 176
Call options to hedge ounces of gold [member] \| Abnormally large changes in asset prices or foreign exchange rates [member]
Statement Line Items [Line Items]
Strike price per ounce						$ 2,200	$ 2,100