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Note 28 - Dividends (Details Textual) | 12 Months Ended
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Dec. 31, 2017 $ / shares
Statement Line Items [Line Items] |
Dividends recognised as distributions to owners per share | $ 68.75

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

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- Definition The amount, per share, of dividends recognised as distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 107 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_107&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration