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Note 14 - Derivative Financial Instruments (Details Textual)												1 Months Ended		12 Months Ended
	Apr. 10, 2024 USD ($)	Mar. 07, 2024 USD ($)	Dec. 19, 2023 USD ($)	Oct. 06, 2023 USD ($)	Sep. 29, 2023 USD ($)	Sep. 23, 2023 USD ($)	May 22, 2023 USD ($)	Dec. 22, 2022 USD ($)	Mar. 09, 2022 USD ($)	Feb. 17, 2022 USD ($)	Dec. 13, 2021 USD ($) oz	Oct. 31, 2023 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 26, 2023 USD ($)	Jul. 31, 2022 USD ($)	May 31, 2022 USD ($)	Mar. 31, 2022 USD ($)
Statement Line Items [Line Items]
Gold price, price per ounce																	$ 1,900
Proceeds from (Payments for) Derivative Financial Instruments												$ 178,000		$ 178,000	$ 0	$ 1,066,000
Auramet International LLC [Member] | Gold loan agreement [member]
Statement Line Items [Line Items]
Proceeds from derivative financial liabilities											$ 3,000,000
Number of Deliveries											2
Repayment gold loan, delivery mass of each (Ounce) | oz											925
Financial liabilities, at fair value																				$ 1,833,000
Auramet International LLC [Member] | Call option 1 [member]
Statement Line Items [Line Items]
Call options, mass (Ounce) | oz											6,000
Strike price per ounce											$ 2,000
Top of range [member]
Statement Line Items [Line Items]
Gold price, price per ounce				$ 1,900	$ 1,900									$ 2,034
Put option 1 [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged			12,000				28,000	16,672
Hedging instruments, protected, price			$ 1,950				$ 1,900	$ 1,750
Put option 1 [member] | Purchase of put options to hedge [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged	12,000	12,000
Hedging instruments, protected, price	$ 2,100	$ 2,050
Purchase option [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged				1,000	1,000	1,000
Hedging instruments, protected, price				$ 1,841	$ 1,875	$ 1,875
Zero cost contract to hedge 20,000 ounces of gold [member]
Statement Line Items [Line Items]
Derivative contract, number of ounces of gold hedged										20,000
Term of derivative contract (Month)										5 months
Hedging contract, cap										$ 1,940
Hedging contract, collar										$ 1,825
Hedging instrument, ounces of gold hedged per month										4,000
Call options to hedge ounces of gold [member]
Statement Line Items [Line Items]
Strike price per ounce													$ 1,959.5
Hedging instrument, ounces of gold hedged per month									4,000				2,400
Hedging instrument, liabilities									$ 796				$ 176
Call options to hedge ounces of gold [member] | Auramet International LLC [Member]
Statement Line Items [Line Items]
Strike price per ounce													$ 1,886
Hedging instrument, ounces of gold hedged per month													2,400
Hedging instrument, liabilities													$ 176
Call options to hedge ounces of gold [member] | Abnormally large changes in asset prices or foreign exchange rates [member]
Statement Line Items [Line Items]
Strike price per ounce																		$ 2,200	$ 2,100

X

- Definition

The mass of call options issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of ounces hedged in a derivative contract.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	xbrli:decimalItemType
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X

- Definition

Represents the price per ounce for gold.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
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X

- Definition

The cap of hedging contract.

+ References

No definition available.

+ Details

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

X

- Definition

The collar of hedging contract.

+ References

No definition available.

+ Details

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

X

- Definition

the number of ounces of gold hedged per month by hedging instrument.

+ References

No definition available.

+ Details

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X

- Definition

The company would be protected if the market price of hedging assets dip below such price.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The number of deliveries.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of cash inflow from derivative financial liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	cmcl_
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X

- Definition

The amount of cash inflow (outflow) for derivative financial instruments.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

The mass of each delivery to repay the gold loan.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:massItemType
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X

- References

No definition available.

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Data Type:	xbrli:stringItemType
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X

- Definition

The strike price per ounce.

+ References

No definition available.

+ Details

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X

- Definition

The term of a derivative contract.

+ References

No definition available.

+ Details

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Balance Type:	na
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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 2023-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard
-URIDate 2023-03-23

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X

- Definition

The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 24A
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_a&doctype=Standard
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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X

- Details

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- Details

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