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Note 16 - Finance Income and Finance Costs - Components of Finance Income and Costs (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Line Items [Line Items]
Finance income received - Bank		$ 14	$ 62	$ 146
Finance cost - Term loan (note 30)		56	386	165
Finance cost - Capitalised to property, plant and equipment (note 18)		(17)	(53)	(165)
Unwinding of rehabilitation provision (note 29)		0	2	20
Finance cost		24	15	17
Finance cost - Overdraft		86	17	307
ZESA interest *	[1]	226	0	0
Finance cost		$ 375	$ 367	$ 344
[1] During the period from January 2021 to March 2021 it was unclear in what currency the monthly payments to the Zimbabwe Electricity Supply Authority (“ZESA”) had to be made. In April 2021 Blanket was advised that the payments had to be paid on a 60/40 basis USD/RTGS$. Interest was charged on the outstanding amounts to ZESA during the period January 2021 to March 2021 when payments were withheld.

X

- Definition

The amount of interest costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset.

+ References

No definition available.

+ Details

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X

- Definition

The amount of interest expense to authority.

+ References

No definition available.

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Namespace Prefix:	cmcl_
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X

- References

No definition available.

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X

- Definition

The amount of expense recognised due to the unwinding of the discount on provisions other than provisions from employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
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X

- Definition

The amount of costs associated with financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 82
-Subparagraph b
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X

- Definition

The amount of interest expense on bank loans and overdrafts. [Refer: Interest expense; Bank overdrafts]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
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X

- Definition

The amount of interest expense on borrowings. [Refer: Interest expense; Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

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-Number 16
-IssueDate 2021-01-01
-Paragraph 53
-Subparagraph b
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- Definition

The amount of interest income on deposits. [Refer: Interest income]

+ References

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-IssueDate 2021-01-01
-Paragraph 112
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