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Note 14 - Derivative Financial Instruments - Derivative Financial Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement Line Items [Line Items]
Derivative financial assets	$ 440	$ 0
Put option [member]
Statement Line Items [Line Items]
Derivative financial assets	$ 440

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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