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Note 9 - Other Income (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of other operating income components [text block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Government grant – Gold sale export incentive |  |  | 2,446 |  |  |  | 1,104 |  |  |  | - |
Other |  |  | 148 |  |  |  | 226 |  |  |  | 110 |
Total |  |  | 2,594 |  |  |  | 1,330 |  |  |  | 110 |

X
- Definition Tabular disclosure of the components in other operating income. + References No definition available. + Details
Name: | cmcl_DisclosureOfOtherOperatingIncomeComponentsTextBlock
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