XML 154 R131.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 28 - Provisions - Reconciliation of Site Restoration Provision (Details) - Provision for decommissioning, restoration and rehabilitation costs [member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Statement Line Items [Line Items] |  |
Balance January 1 | $ 3,346 | $ 3,309
Unwinding of discount | 2 | 20
Change in estimate - adjustment capitalised in Property, plant and equipment | 219 | 17
Balance December 31 | $ 3,567 | $ 3,346

X
- Definition The increase (decrease) in other provisions resulting from a change in discount rate adjustment capitalised in property, plant, and equipment. + References No definition available. + Details
Name: | cmcl_IncreaseDecreaseThroughChangeInDiscountRateAdjustmentCapitalisedInPropertyPlantAndEquipmentOtherProvisions
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 increase in other provisions through adjustments arising from the passage of time. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_OtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |