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Note 9 - Production Costs (Tables) | 12 Months Ended
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Dec. 31, 2019
Statement Line Items [Line Items] |
Disclosure of components for cost of sales [text block] |
|  | 2019 |  | 2018 |  | 2017
Salaries and wages |  |  | 13,905 |  |  |  | 13,160 |  |  |  | 13,440 |
Cash-settled share-based payments (note 27.1(a)) |  |  | 107 |  |  |  | 43 |  |  |  | 311 |
Consumable materials |  |  | 13,020 |  |  |  | 12,143 |  |  |  | 9,916 |
Electricity costs |  |  | 6,383 |  |  |  | 9,313 |  |  |  | 8,701 |
Site restoration |  |  | - |  |  |  | 84 |  |  |  | 58 |
Pre-feasibility exploration cost |  |  | 301 |  |  |  | 411 |  |  |  | 410 |
Safety |  |  | 525 |  |  |  | 592 |  |  |  | 323 |
On mine administration |  |  | 2,159 |  |  |  | 3,569 |  |  |  | 3,004 |
Other production cost |  |  | - |  |  |  | - |  |  |  | 17 |
|  |  | 36,400 |  |  |  | 39,315 |  |  |  | 36,180 |

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- Definition Tabular disclosure for the components of costs of sales. + 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