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Note 37 - Group Entities - Subsidiaries of the Company (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 20, 2020
Dec. 31, 2021
Dec. 31, 2020
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%)   $ 0 $ 0
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%)   $ 0 $ 0
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%)   $ 1,406 $ 612
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%)   $ 22,916 $ 20,818
Blanket Mine (1983) (Private) Limited [member]      
Statement Line Items [Line Items]      
Percentage of ownership [1]   64.00% 64.00%
Blanket Mine (1983) (Private) Limited [member] | Elimination of intersegment amounts [member]      
Statement Line Items [Line Items]      
Net assets of Blanket Mine (100%)   $ 5,765 $ 3,980
Blanket Employee Trust Services (Private) Limited (BETS) [member]      
Statement Line Items [Line Items]      
Percentage of ownership [2]   0.00% 0.00%
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]   $ 0 $ 0
[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.