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Note 20 - Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2018
Statement Line Items [Line Items] |
Disclosure of the components of cash and cash equivalents [text block] |
|  | 2018 |  |  | 2017 |
Bank balances |  |  | 11,187 |  |  |  | 13,067 |
Cash and cash equivalents in the statement of financial position |  |  | 11,187 |  |  |  | 13,067 |
Bank overdrafts used for cash management purposes |  |  | — |  |  |  | (311 | )
Net cash and cash equivalents at year end |  |  | 11,187 |  |  |  | 12,756 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + 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