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Note 10 - Other Expenses (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of components of other operating expense [text block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Impairment provision - 2016 royalty rebate (note 17) |  |  | 181 |  |  |  | - |  |  |  | - |
Other |  |  | 14 |  |  |  | 55 |  |  |  | - |
Total |  |  | 195 |  |  |  | 55 |  |  |  | - |

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- Definition Tabular disclosure of the components of other operating expenses. + References No definition available. + Details
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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