XML 106 R83.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 6 - Blanket Zimbabwe Indigenisation Transaction - Shareholder Percentages and Facilitation Loan Balances (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 20, 2012 | Dec. 31, 2020 | Dec. 31, 2019 | [1]
Statement Line Items [Line Items] |  |  |  |  |
Shareholding |  | 51.00% | 36.00% |  |
NCI Recognized |  |  | 13.20% |  |
NCI subject to facilitation loans |  |  | 12.80% |  |
Faciliation loans |  |  | $ 19,175 |  | $ 30,974
NIEEF [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Shareholding |  | 16.00% | 16.00% |  |
NCI Recognized |  |  | 3.20% |  |
NCI subject to facilitation loans |  |  | 12.80% |  |
Faciliation loans |  |  | $ 11,728 |  | 11,877
Fremiro [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Shareholding |  | 15.00% |  | [2] |
NCI Recognized | [2] |  |  |  |
NCI subject to facilitation loans | [2] |  |  |  |
Faciliation loans |  |  |  | [2] | 11,458
Community Trust [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Shareholding |  | 10.00% | 10.00% |  |
NCI Recognized |  |  | 10.00% |  |
NCI subject to facilitation loans |  |  |  |  |
Faciliation loans |  |  |  |  |
BETS [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Shareholding | [3] |  | 10.00% |  |
NCI Recognized | [4] |  |  |  |
NCI subject to facilitation loans | [4] |  |  |  |
Faciliation loans |  |  | $ 7,447 |  | $ 7,639
[1] | Facilitation loans are accounted for as equity instruments and are accordingly not recognised as loans receivable.
[2] | After Fremiro repurchase on January 20, 2020.
[3] | Accounted for under IAS19 Employee Benefits.
[4] | The shares held by BETS are effectively treated as treasury shares (see above).

X
- Definition Amount of facilitation loans accounted for as equity instruments and accordingly not recognized as loans receivable. + References No definition available. + Details
Name: | cmcl_FacilitationLoans
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The proportion of ownership interests held by non-controlling interests recognized. + References No definition available. + Details
Name: | cmcl_NCIRecognised
Namespace Prefix: | cmcl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interests by non-controlling interests recognized subject to facilitation loans + References No definition available. + Details
Name: | cmcl_NCISubjectToFacilitationLoans
Namespace Prefix: | cmcl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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 2020-01-01 -Paragraph 12 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_12_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cmcl_NIEEFMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cmcl_FremiroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cmcl_CommunityTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cmcl_BETSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |