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Note 33 - Financial Instruments and Risk Management - Exposure to Risk (Details) R in Thousands, $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2023 ZAR (R)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 ZAR (R)
Currency risk [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	$ 7,718	R 62	$ 5,920	R 62
Effect of possible strengthening or weakening	320	3	252	3
Assets and liabilities exposed to interest rate fluctuations	7,718	62	5,920	62
Sensitivity analysis	320	3	252	3
Currency risk [member] | Cash and cash equivalents 1 [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	4,706	62	3,443	62
Effect of possible strengthening or weakening	177	3	134	3
Assets and liabilities exposed to interest rate fluctuations	4,706	62	3,443	62
Sensitivity analysis	177	3	134	3
Currency risk [member] | Cash and cash equivalents 1 [member] | USD [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	0	61	0	62
Assets and liabilities exposed to interest rate fluctuations	0	61	0	62
Currency risk [member] | Cash and cash equivalents 1 [member] | ZAR [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	989	0	631	0
Assets and liabilities exposed to interest rate fluctuations	989	0	631	0
Currency risk [member] | Cash and cash equivalents 1 [member] | RTGS [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	3,424	0	2,502	0
Assets and liabilities exposed to interest rate fluctuations	3,424	0	2,502	0
Currency risk [member] | Cash and cash equivalents 1 [member] | GBP [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	293	1	235	0
Assets and liabilities exposed to interest rate fluctuations	293	1	235	0
Currency risk [member] | Cash and cash equivalents 1 [member] | CAD [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	0	0	75	0
Assets and liabilities exposed to interest rate fluctuations	0	0	75	0
Currency risk [member] | Trade and other receivables [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	148	0	124	0
Sensitivity analysis	148	0	124	0
Currency risk [member] | Trade and other receivables [member] | RTGS [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	3,118	0	2,607	0
Assets and liabilities exposed to interest rate fluctuations	3,118	0	2,607	0
Currency risk [member] | Term loan and bank overdraft [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	0	0	0	0
Sensitivity analysis	0	0	0	0
Currency risk [member] | Term loan and bank overdraft [member] | RTGS [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	0	0	0	0
Assets and liabilities exposed to interest rate fluctuations	0	0	0	0
Currency risk [member] | Trade and other payables [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	(5)	0	(6)	0
Sensitivity analysis	(5)	0	(6)	0
Currency risk [member] | Trade and other payables [member] | RTGS [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	(106)	0	(130)	0
Assets and liabilities exposed to interest rate fluctuations	(106)	R 0	(130)	R 0
Interest rate risk [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	(11,032)		1,496
Assets and liabilities exposed to interest rate fluctuations	(11,032)		1,496
Interest rate risk [member] | Cash and cash equivalents 1 [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	6,708		6,735
Assets and liabilities exposed to interest rate fluctuations	6,708		6,735
Interest rate risk [member] | Term loan and bank overdraft [member]
Statement Line Items [Line Items]
Net monetary assets/(liabilities) exposed	(17,740)		(5,239)
Assets and liabilities exposed to interest rate fluctuations	(17,740)		(5,239)
Interest rate risk , increase by 100 basis points [member] | Cash and cash equivalents 1 [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	67		67
Sensitivity analysis	67		67
Interest rate risk , increase by 100 basis points [member] | Overdrafts [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	177		52
Sensitivity analysis	177		52
Interest rate risk, decrease by 100 basis points [member] | Cash and cash equivalents 1 [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	(67)		(67)
Sensitivity analysis	(67)		(67)
Interest rate risk, decrease by 100 basis points [member] | Overdrafts [member]
Statement Line Items [Line Items]
Effect of possible strengthening or weakening	(177)		(52)
Sensitivity analysis	$ (177)		$ (52)

X

- Definition

The effect on profit or loss and equity due to the various functional currencies against the foreign currencies.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The monetary assets and liabilities denominated in foreign currencies which is different to the functional currency of the underlying entities, the profit or loss and equity in the underlying entities could be affected by movements between the functional currency and the foreign currency.

+ References

No definition available.

+ Details

Name:	cmcl_NetMonetaryAssetsliabilitiesExposed
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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cmcl_CashAndCashEquivalents1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=cmcl_UsdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=cmcl_ZarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=cmcl_RtgsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=cmcl_GbpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=cmcl_CadMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cmcl_TradeAndOtherReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cmcl_TradeAndOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=cmcl_InterestRateRiskIncreaseBy100BasisPointsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cmcl_OverdraftsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=cmcl_InterestRateRiskDecreaseBy100BasisPointsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: