XML 139 R122.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 31 - Group Entities (Details Textual) |  | 12 Months Ended
--- | --- | ---
Feb. 20, 2012 | Dec. 31, 2017
Statement Line Items [Line Items] |  |
Proportion of ownership interests held by non-controlling interests | 51.00% | 51.00%
Blanket Mine (1983) (Private) Limited [member] |  |
Statement Line Items [Line Items] |  |
Proportion of ownership interests held by non-controlling interests |  | 16.20%

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

X
- Definition The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 12 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_12_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=cmcl_BlanketMine1983PrivateLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |