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Note 14 - Derivative Financial Instruments - Allocation of Proceeds Received (Details) - Auramet International LLC [Member] $ in Thousands	Dec. 13, 2021 USD ($)
Statement Line Items [Line Items]
Net proceeds received	$ 2,960
Call option [member]
Statement Line Items [Line Items]
Financial liabilities, at fair value	208
Gold loan agreement [member]
Statement Line Items [Line Items]
Financial liabilities, at fair value	$ 2,752

X

- Definition

The cash inflow from derivative financial liabilities, net of transaction costs.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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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

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Namespace Prefix:
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Balance Type:
Period Type: