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Note 17 - Property, Plant, and Equipment - Reconciliation of Changes in Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement Line Items [Line Items]      
Balance at beginning of period $ 149,102    
Additions* 48,220 $ 31,479  
Impairments@ (8,209) (498) $ 0
Balance at end of period 178,983 149,102  
Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 195,138 165,862  
Additions* 47,348 31,479 [1]  
Impairments@ (9,516) (1,630) [2]  
Derecognised plant and equipment   (402)  
Reallocations between asset classes # 0 0 [3]  
Foreign exchange movement (16) (171)  
Acquisition of Bilboes oxide assets (Tribute) 872    
Balance at end of period 233,826 195,138 165,862
Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   (1,133)  
Derecognised plant and equipment (1,307) (230)  
Foreign exchange movement (27) (30)  
Balance at beginning of period 46,036 39,383  
Depreciation for the year 10,141 8,046  
Balance at end of period 54,843 46,036 39,383
Land and buildings [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 7,100    
Balance at end of period 6,844 7,100  
Land and buildings [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 14,435 11,315  
Additions* 0 0 [1]  
Impairments@ 0 0 [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # 759 3,120 [3]  
Foreign exchange movement 0 0  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 15,194 14,435 11,315
Land and buildings [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment 0 0  
Foreign exchange movement 0 0  
Balance at beginning of period 7,335 6,233  
Depreciation for the year 1,015 1,102  
Balance at end of period 8,350 7,335 6,233
Right-of-use assets [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 446    
Balance at end of period 295 446  
Right-of-use assets [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 543 442  
Additions* 0 528 [1]  
Impairments@ 0 0 [2]  
Derecognised plant and equipment   (402)  
Reallocations between asset classes # 0 0 [3]  
Foreign exchange movement (18) (25)  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 525 543 442
Right-of-use assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment 0 (230)  
Foreign exchange movement (4) (1)  
Balance at beginning of period 97 213  
Depreciation for the year 137 115  
Balance at end of period 230 97 213
Mining assets [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 65,004    
Balance at end of period 69,786 65,004  
Mining assets [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 73,914 23,983  
Additions* 0 678 [1]  
Impairments@ (8,518) 0 [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # 15,886 49,253 [3]  
Foreign exchange movement 0 0  
Acquisition of Bilboes oxide assets (Tribute) 872    
Balance at end of period 82,154 73,914 23,983
Mining assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment (532) 0  
Foreign exchange movement 0 0  
Balance at beginning of period 8,910 6,443  
Depreciation for the year 3,990 2,467  
Balance at end of period 12,368 8,910 6,443
Assets under construction and decommissioning assets [member]      
Statement Line Items [Line Items]      
Balance at beginning of period [4] 34,876    
Balance at end of period [4] 45,760 34,876  
Assets under construction and decommissioning assets [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 35,476 84,856  
Additions* 31,711 24,851 [1]  
Impairments@ 0 (65) [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # (20,734) (74,166) [3]  
Foreign exchange movement 0 0  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 46,453 35,476 84,856
Assets under construction and decommissioning assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@ [4]   0  
Derecognised plant and equipment [4] 0 0  
Foreign exchange movement [4] 0 0  
Balance at beginning of period [4] 600 530  
Depreciation for the year [4] 93 70  
Balance at end of period [4] 693 600 530
Plant and equipment [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 38,814    
Balance at end of period 41,228 38,814  
Plant and equipment [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 64,319 40,644  
Additions* 3,049 3,531 [1]  
Impairments@ (998) (1,565) [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # 4,089 21,785 [3]  
Foreign exchange movement 26 (76)  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 70,485 64,319 40,644
Plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   (1,133)  
Derecognised plant and equipment (775) 0  
Foreign exchange movement 0 0  
Balance at beginning of period 25,505 22,685  
Depreciation for the year 4,527 3,953  
Balance at end of period 29,257 25,505 22,685
Fixtures and fittings [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 384    
Balance at end of period 463 384  
Fixtures and fittings [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 1,342 1,235  
Additions* 243 134 [1]  
Impairments@ 0 0 [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # 0 8 [3]  
Foreign exchange movement (22) (35)  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 1,563 1,342 1,235
Fixtures and fittings [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment 0 0  
Foreign exchange movement (21) (27)  
Balance at beginning of period 958 849  
Depreciation for the year 163 136  
Balance at end of period 1,100 958 849
Motor vehicles [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 538    
Balance at end of period 469 538  
Motor vehicles [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 3,169 2,995  
Additions* 147 176 [1]  
Impairments@ 0 0 [2]  
Derecognised plant and equipment   0  
Reallocations between asset classes # 0 0 [3]  
Foreign exchange movement (2) (2)  
Acquisition of Bilboes oxide assets (Tribute) 0    
Balance at end of period 3,314 3,169 2,995
Motor vehicles [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment 0 0  
Foreign exchange movement (2) (2)  
Balance at beginning of period 2,631 2,430  
Depreciation for the year 216 203  
Balance at end of period 2,845 2,631 2,430
Solar plant [member]      
Statement Line Items [Line Items]      
Balance at beginning of period 1,940    
Balance at end of period 14,138 1,940  
Solar plant [member] | Gross carrying amount [member]      
Statement Line Items [Line Items]      
Balance at beginning of period [5] 1,940 392  
Additions* [5] 12,198 1,581 [1]  
Impairments@ [5] 0 0 [2]  
Derecognised plant and equipment [5]   0  
Reallocations between asset classes # [5] 0 0 [3]  
Foreign exchange movement [5] 0 (33)  
Acquisition of Bilboes oxide assets (Tribute) [5] 0    
Balance at end of period [5] 14,138 1,940 392
Solar plant [member] | Accumulated depreciation, amortisation and impairment [member]      
Statement Line Items [Line Items]      
Impairments@   0  
Derecognised plant and equipment 0 0  
Foreign exchange movement 0 0  
Balance at beginning of period 0 0  
Depreciation for the year 0 0  
Balance at end of period $ 0 $ 0 $ 0
[1] Included in additions is the change in estimate for the decommissioning asset of ($468) (2021: ($408)), refer to note 28.
[2] Included in the 2022 impairments are development asset costs of $8,518 that predominantly relates to prospective areas above 750 meters at Blanket which are not included in the LoMP. Also included in the 2022 impairments are generator cost of $791 and loader bottom decks at a cost of $101, these assets were no longer in working conditions. Included in the 2021 impairments are gensets cost of $1,001 and guide ropes cost of $310 that were no longer in working condition. The carrying amount for these impaired assets were impaired to $Nil.
[3] Included in the reallocation between asset classes is an amount of $18,509 for the Central Shaft that was reallocated from CWIP (Mine development, infrastructure and other) to Plant and equipment at the time of the commissioning of the Central Shaft.
[4] Accumulated depreciation and depreciation under Assets under construction and decommissioning assets include depreciation on decommissioning assets.
[5] The solar plant was fully commissioned on February 2, 2023 and the sale agreement between Caledonia Mining Corporation Plc and Caledonia Mining Services (Private) Limited was concluded for the sale of the solar plant. Depreciation on the solar plant started on February 2, 2023 and the power purchase agreement, between Caledonia Mining Services (Private) Limited and Blanket Mine, became effective. In December 2022, the Caledonia board approved a proposal for Caledonia Mining Services (PvT) Ltd (which owns the solar plant) to issue loan note instruments (“bonds”) up to a value of $12,000. The decision was taken in order to optimise the capital structure of the Group and provide additional debt instruments to the Zimbabwean financial market. The bonds have an interest rate of 9.5% payable bi-annually and have a tenor of 3 years from the date of issue. The bond repayments are guaranteed by the Company and post December 31, 2022 $4.5 million was issued to Zimbabwean registered commercial entities.