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Note 37 - Group Entities - Subsidiaries of the Company (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 20, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  | 64.00% |  |
Caledonia Holdings Zimbabwe (Private) Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  |  | 100.00% | 100.00%
Caledonia Holdings Zimbabwe (Private) Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  |  |
Caledonia Mining Services Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  |  | 100.00% | 100.00%
Caledonia Mining Services Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  |  |
Fintona Investments Proprietary Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  |  | 100.00% | 100.00%
Fintona Investments Proprietary Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  | $ (14,859) | $ (14,859)
Caledonia Mining South Africa Proprietary Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  |  | 100.00% | 100.00%
Caledonia Mining South Africa Proprietary Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  | $ 612 | $ 1,750
Greenstone Management Services Holdings Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership |  |  | 100.00% | 100.00%
Greenstone Management Services Holdings Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  | $ 20,818 | $ 14,902
Blanket Mine (1983) (Private) Limited [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership | [1] |  | 64.00% | 49.00%
Blanket Mine (1983) (Private) Limited [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) |  |  | $ (3,980) | $ (400)
Blanket Employee Trust Services (Private) Limited (BETS) [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Percentage of ownership | [2] |  |  |
Blanket Employee Trust Services (Private) Limited (BETS) [member] | Elimination of intersegment amounts [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Net assets of Blanket Mine (100%) | [2] |  |  |
[1] | Refer to Note 6, for the effective shareholding. NCI has a 13.2% (2019: 16.2%, 2018: 16.2%) interest in cash flows of Blanket only.
[2] | BETS and the Community Trust are consolidated as structured entities.

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