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Note 20 - Inventories (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement Line Items [Line Items]
Write-down of inventory	$ 563	$ 0	$ 0

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 inventory write-down.

+ References

No definition available.

+ Details

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