XML 131 R126.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 27 - Share-based Expenses - Option Activity (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
May 30, 2018 | [1] | Feb. 27, 2018 | Dec. 31, 2019 CAD ($) $ / shares | Dec. 31, 2018 CAD ($) $ / shares | Dec. 31, 2017 CAD ($) $ / shares
Statement Line Items [Line Items] |  |  |  |  |
Number of options outstanding and exercisable |  |  | 38,000 | 28,000 | 92,280
Weighted average exercise price, options outstanding and exercisable | $ |  |  | $ 9.48 | $ 9.55 | $ 5.85
Number of options granted | 5,000 | 10,000 |  | 10,000 | 5,000
Weighted average exercise price, granted (in CAD per share) | $ / shares |  |  |  | $ 9.30 | $ 8.10
Number of options exercised |  |  |  |  | (69,280)
Weighted average exercise price, exercised (in CAD per share) | $ / shares |  |  |  |  | $ 4.50
Number of options outstanding and exercisable |  |  | 38,000 | 38,000 | 28,000
Weighted average exercise price, options outstanding and exercisable | $ |  |  | $ 9.48 | $ 9.48 | $ 9.55
[1] | Amounts stated after the 1:5 share consolidation effected on June 26, 2017.

X
- Definition The number of share options outstanding and exercisable in a share-based payment arrangement. + References No definition available. + Details
Name: | cmcl_NumberOfShareOptionsOutstandingAndExercisableInSharebasedPaymentArrangement
Namespace Prefix: | cmcl_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Weighted average exercise price of share options outstanding and exercisable in share-based payment arrangement + References No definition available. + Details
Name: | cmcl_WeightedAverageExercisePriceOfShareOptionsOutstandingAndExercisableInSharebasedPaymentArrangement
Namespace Prefix: | cmcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of share options exercised 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 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_iv&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of 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 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of share options exercised in a share-based payment arrangement. [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 b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_iv&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of share options granted in a share-based payment arrangement. [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 b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration