XML 44 R80.htm IDEA: XBRL DOCUMENT v3.20.1

Note 6 - Blanket Mine Indigenization Transaction - Shareholder Percentages and Facilitation Loan Balances (Details) - USD ($) $ in Thousands			12 Months Ended
		Feb. 20, 2012	Dec. 31, 2019	Dec. 31, 2018
Statement Line Items [Line Items]
Shareholding		51.00%	51.00%
NCI Recognized			16.20%
NCI subject to facilitation loans			24.80%
Faciliation loans			$ 30,974	$ 30,986
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			$ 11,877	11,876
Fremiro [member]
Statement Line Items [Line Items]
Shareholding		15.00%	15.00%
NCI Recognized			3.00%
NCI subject to facilitation loans			12.00%
Faciliation loans			$ 11,458	11,466
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			10.00%
NCI Recognized	[1]
NCI subject to facilitation loans	[1]
Faciliation loans			$ 7,639	$ 7,644
[1] The shares held by BETS are effectively treated as treasury shares (see above). The BETS facilitation loan earnings are accounted for under IAS19 Employee Benefits as an employee charge under Production cost.

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 2019-01-01
-Paragraph 12
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_12_c&doctype=Standard
-URIDate 2019-03-27

+ 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: