XML 45 R121.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 27 - Share-based Expenses (Details Textual) |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 19, 2020 | May 30, 2018 | Feb. 27, 2018 | Jun. 26, 2017 | Jun. 23, 2017 USD ($) | Feb. 20, 2012 | Jul. 31, 2017 GBP (£) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 22, 2017
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities from share-based payment transactions |  |  |  |  |  |  |  | $ 540,000 | $ 2,090,000 | [1] |  |  |
Expense from cash-settled share-based payment transactions |  |  |  |  |  |  |  | 107,000 | 43,000 |  | $ 311,000 |  |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  |  |  |  | $ 689,000 | $ 315,000 | [2] | 976,000 | [2] |
Option life, share options granted |  | 3 | 3 |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement, percentage of outstanding stock maximum |  |  |  |  |  |  |  | 10.00% |  |  |  |  |
Weighted average remaining contractual life of outstanding share options |  |  |  |  |  |  |  | 2 years 51 days | 3 years 51 days |  |  |  |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  | $ 806,000 |  |  |  | $ 14,000 | [2] | 835,000 | [2] |
Share consolidation ratio |  |  |  | 5 |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  |  |  |  |  |  |  |  |  |  |  | 10.00%
Borrowings, interest rate |  |  |  |  | 7.25% |  |  |  |  |  |  |  |
Dividend loans, Percentage of dividend as payment of interest |  |  |  |  | 80.00% | 80.00% |  |  |  |  |  |  |
Faciliation and advanced dividend loans [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  | $ 806,000 |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  | 7.25% |  |  |  |  |  |  |  |
Dividend loans, Percentage of dividend as payment of interest |  |  |  |  | 80.00% |  |  |  |  |  |  |  |
LIBOR [member] | Faciliation and advanced dividend loans [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  |  |  |  |  |  |  |  |  |  |  | 10.00%
Mr. J Staiger [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  |  |  |  | $ 0 | 14,000 |  | $ 29,000 |  |
Restricted stock units (RSUs) [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  |  |  |  |  |  | 3 |  |  |  |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  |  |  |  |  |  | $ 8.46 | $ 5.46 |  |  |  |
Restricted stock units (RSUs) [member] | Potential ordinary share transactions [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments granted in share-based payment arrangement | 17,585 |  |  |  |  |  |  |  |  |  |  |  |
Performance share units (PSUs) [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  |  |  |  |  |  | 3 |  |  |  |  |
Performance probability |  |  |  |  |  |  |  |  | 85.00% |  | 94.00% |  |
Liabilities from share-based payment transactions |  |  |  |  |  |  |  | $ 524,000 | $ 2,043,000 |  |  |  |
Expense from cash-settled share-based payment transactions |  |  |  |  |  |  |  | 107,000 | 43,000 |  | $ 311,000 |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  |  |  |  |  |  | $ 8.19 | 5.46 |  |  |  |
Performance share units (PSUs) [member] | Potential ordinary share transactions [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments granted in share-based payment arrangement | 121,332 |  |  |  |  |  |  |  |  |  |  |  |
Performance share units (PSUs) [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Performance probability |  |  |  |  |  |  |  | 93.00% |  |  |  |  |
Performance share units (PSUs) [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Performance probability |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
PSUs and RSUs [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Value of other equity instruments exercised or vested in share-based payment arrangement |  |  |  |  |  |  |  | $ 2,243,000 |  |  |  |  |
Value of other equity instruments exercised or vested in share-based payment arrangement, share capital |  |  |  |  |  |  |  | 963,000 |  |  |  |  |
Cash-settled awards [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  |  |  |  |  | 3 |  |  |  |  |  |
Liabilities from share-based payment transactions |  |  |  |  |  |  |  | 16,000 | 47,000 |  |  |  |
Number of other equity instruments granted in share-based payment arrangement |  |  |  |  |  |  | 52,282 |  |  |  |  |  |
Weighted average fair value at measurement date, other equity instruments granted | £ |  |  |  |  |  |  | £ 6.07 |  |  |  |  |  |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  |  |  |  | $ 73,000 | $ 97,000 |  | $ 123,000 |  |
Omnibus Equity Incetive Compensation Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Option life, share options granted |  |  |  |  |  |  |  | 10 |  |  |  |  |
Rolling Stock Option Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Option life, share options granted |  |  |  |  |  |  |  | 5 |  |  |  |  |
[1] | The Group initially applied IFRS 16 on January 1, 2019, using the modified retrospective approach. Under this approach, comparative information is not restated. There was no cumulative effect of initially applying IFRS 16 to recognise in retained earnings at the date of initial application.
[2] | The Group initially applied IFRS 16 on January 1, 2019, using the modified retrospective approach. Under this approach, comparative information is not restated. There was no cumulative effect of initially applying IFRS 16 to recognise in retained earnings at the date of initial application.

X
- Definition Percentage of dividends paid to determine amount of interest to pay on dividend loans. + References No definition available. + Details
Name: | cmcl_DividendLoansPercentageOfDividendAsPaymentOfInterest
Namespace Prefix: | cmcl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense arising from cash-settled share-based payment transactions. + References No definition available. + Details
Name: | cmcl_ExpenseFromCashsettledSharebasedPaymentTransactions
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The probability that performance conditions will be met on performance share units. + References No definition available. + Details
Name: | cmcl_PerformanceProbability
Namespace Prefix: | cmcl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares consolidated per one share during the period. + References No definition available. + Details
Name: | cmcl_ShareConsolidationRatio
Namespace Prefix: | cmcl_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock. + References No definition available. + Details
Name: | cmcl_SharebasedCompensationArrangementPercentageOfOutstandingStockMaximum
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 value of other equity instruments exercised or vested in share-based payment arrangement. + References No definition available. + Details
Name: | cmcl_ValueOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The value of other equity instruments exercised or vested in share-based payment arrangement issued as share capital. + References No definition available. + Details
Name: | cmcl_ValueOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangementShareCapital
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The vesting period of other equity instruments. + References No definition available. + Details
Name: | cmcl_VestingPeriodOfOtherEquityInstruments
Namespace Prefix: | cmcl_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The option life of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DescriptionOfOptionLifeShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_51_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 51 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_51_b_i&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_d&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cmcl_FaciliationAndAdvancedDividendLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=cmcl_LIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=cmcl_MrJStaigerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_RestrictedStockUnitsRsusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_PotentialOrdinaryShareTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_PerformanceShareUnitsPsusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_PSUsAndRSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_CashsettledAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_OmnibusEquityIncetiveCompensationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cmcl_RollingStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |