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Note 21 - Disposal Group Held For Sale (Tables) | 12 Months Ended
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Dec. 31, 2018
Statement Line Items [Line Items] |
Disclosure of assets and liabilities classified as held for sale [text block] |
|  | 2018 |  |  | 2017 |
Non-current assets |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  | 214 |  |  |  | — |
Current assets |  |  |  |  |  |  |  |
Trade and other receivables |  |  | 80 |  |  |  | — |
Cash and cash equivalents |  |  | 2 |  |  |  | — |
Assets held for sale |  |  | 296 |  |  |  | — |
Non-current liabilities |  |  |  |  |  |  |  |
Rehabilitation provision |  |  | 602 |  |  |  | — |
Current liabilities |  |  |  |  |  |  |  |
Trade and other payables |  |  | 7 |  |  |  | — |
Liabilities associated with assets held for sale |  |  | 609 |  |  |  | — |

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- Definition The disclosure of assets and liabilities classified as held for sale. + References No definition available. + Details
Name: | cmcl_DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForSaleTextBlock
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