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Note 41 - Subsequent Events (Details Textual) |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 09, 2022 USD ($) | Feb. 17, 2022 USD ($) | Mar. 31, 2022 USD ($) | Jul. 31, 2022 USD ($) | May 31, 2022 USD ($)
Abnormally large changes in asset prices or foreign exchange rates [member] | 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 |  | $ 1,940,000 |  |  |
Hedging contract, collar |  | $ 1,825,000 |  |  |
Derivative contract, number of ounces of gold hedged per month expiry |  | 4,000 |  |  |
Abnormally large changes in asset prices or foreign exchange rates [member] | Call options to hedge ounces of gold [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Hedging instrument, liabilities | $ 796,000,000 |  |  |  |
Hedging instrument, ounces of gold hedged per month | 4,000 |  |  |  |
Strike price per ounce |  |  |  | $ 2,200 | $ 2,100
Impairment of assets [member] | Exploration and evaluation assets [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Impairment loss |  |  | $ 463,000 |  |

X
- Definition The number of ounces hedged in a derivative contract. + References No definition available. + Details
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Namespace Prefix: | cmcl_
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Balance Type: | na
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X
- Definition The number of ounces of gold hedged per month expiry of derivative contract. + References No definition available. + Details
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Namespace Prefix: | cmcl_
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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
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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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- References No definition available. + Details
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X
- Definition The strike price per ounce. + References No definition available. + Details
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Period Type: | instant

X
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Period Type: | duration

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 2021-01-01 -Paragraph 24A -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2021-03-24 + Details
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X
- Definition The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_d_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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- Details
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- Details
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