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Note 33 - Financial Instruments and Risk Management - Sensitivity Analysis on Derivative Financial Liabilities Market Risk (Details) - Market risk [member] $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Statement Line Items [Line Items]
Derivative financial liabilities -increase	$ 154
Derivative financial liabilities - decrease	(154)
Fair value loss on derivative financial instruments - increase	154
Fair value loss on derivative financial instruments - decrease	(154)
Gold loan agreement [member]
Statement Line Items [Line Items]
Derivative financial liabilities -increase	143
Derivative financial liabilities - decrease	(143)
Fair value loss on derivative financial instruments - increase	143
Fair value loss on derivative financial instruments - decrease	(143)
Call option [member]
Statement Line Items [Line Items]
Derivative financial liabilities -increase	11
Derivative financial liabilities - decrease	(11)
Fair value loss on derivative financial instruments - increase	11
Fair value loss on derivative financial instruments - decrease	$ (11)

X

- Definition

The effect of five percent decrease in gold price in derivative financial liabilities.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

The effect of five percent decrease in gold price on fair value loss of derivative financial instruments.

+ References

No definition available.

+ Details

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X

- Definition

The effect of a five percent increase in gold price on derivative financial liability.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
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- Definition

The effect of five percent increase in gold price on fair value loss of derivative financial instruments.

+ References

No definition available.

+ Details

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- References

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X

- Details

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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