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Note 34 - Group Entities - Subsidiaries of the Company (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 05, 2018 | Dec. 31, 2018 | Dec. 31, 2017
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 |  |  |  |  |  |
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 |  |  |  |  |  |
Eersteling Gold Mining Company Limited [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Percentage of ownership |  |  | 100.00% |  | 100.00% |
Eersteling Gold Mining Company Limited [member] | Elimination of intersegment amounts [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Net assets |  |  | $ (13,179) |  | $ (12,956) |
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 |  |  | $ (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 |  |  | $ (565) |  | $ (941) |
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 |  |  | $ 9,813 |  | $ 20,879 |
Blanket Mine (1983) (Private) Limited [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Percentage of ownership |  | 64.00% | 49.00% | [1],[2] | 49.00% | [1],[2]
Blanket Mine (1983) (Private) Limited [member] | Elimination of intersegment amounts [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Net assets | [1] |  |  |  |  |
Blanket Employee Trust Services (Private) Limited (BETS) [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Percentage of ownership | [3] |  |  |  |  |
Blanket Employee Trust Services (Private) Limited (BETS) [member] | Elimination of intersegment amounts [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Net assets | [3] |  |  |  |  |
[1] | Blanket has no subsidiary companies
[2] | Refer to Note 6, for the effective shareholding. NCI has a 16.2% interest in cash flows of Blanket only.
[3] | BETS and the Employee Trust are consolidated as structured entities.

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