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Note 28 - Dividends (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of dividends paid [text block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Dividends paid to owners of the Company (Excluding NCI) |  |  | 2,904 |  |  |  | 2,639 |  |  |  | 2,504 |

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- Definition The disclosure of dividends paid. + References No definition available. + Details
Name: | cmcl_DisclosureOfDividendsPaidTextBlock
Namespace Prefix: | cmcl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | cmcl_StatementLineItems
Namespace Prefix: | cmcl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration