XML 71 R99.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 17 - Tax Expense - Unrecognised Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Eersteling Gold Mining Company Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets |  | $ 4,989 | $ 4,989
Caledonia Holdings Zimbabwe (Private) Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | 421 |  |
Greenstone Management Services Holdings Limited [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | 276 | 191 | 116
Unused tax losses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Unrecognised deferred tax assets | $ 697 | $ 5,180 | $ 5,105

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 amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_EerstelingGoldMiningCompanyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_CaledoniaHoldingsZimbabwePrivateLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=cmcl_GreenstoneManagementServicesHoldingsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnusedTaxLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |