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Note 18 - Property, Plant, and Equipment - Reconciliation of Changes in Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement Line Items [Line Items]        
Balance at beginning of period   $ 178,983    
Additions*   29,606 $ 48,220  
Impairments@   (877) (8,209) $ (498)
Balance at end of period $ 179,649 179,649 178,983  
Depreciation for the year 2,158      
Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   233,826 195,138  
Additions* [1]   29,606 47,348  
Impairments@   (908) [2] (9,516) [3]  
Reallocations between asset classes   0 0  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     872  
Foreign exchange movement   (66) (16)  
Disposals   (33)    
Reallocate to assets held for sale   (14,301)    
Balance at end of period 248,124 248,124 233,826 195,138
Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   (31) (1,307)  
Foreign exchange movement   (41) (27)  
Balance at beginning of period   54,843 46,036  
Depreciation for the year   14,486 10,141  
Accumulated depreciation for assets reallocated to assets held for sale   (782)    
Balance at end of period 68,475 68,475 54,843 46,036
Land and buildings [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   6,844    
Balance at end of period 7,324 7,324 6,844  
Land and buildings [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   15,194 14,435  
Additions* [1]   0 0  
Impairments@   0 [2] 0 [3]  
Reallocations between asset classes   1,492 759  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   0 0  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 16,686 16,686 15,194 14,435
Land and buildings [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   0 0  
Foreign exchange movement   0 0  
Balance at beginning of period   8,350 7,335  
Depreciation for the year   1,012 1,015  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 9,362 9,362 8,350 7,335
Right-of-use assets [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   295    
Balance at end of period 156 156 295  
Right-of-use assets [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   525 543  
Additions* [1]   0 0  
Impairments@   0 [2] 0 [3]  
Reallocations between asset classes   0 0  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   (24) (18)  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 501 501 525 543
Right-of-use assets [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   0 0  
Foreign exchange movement   (9) (4)  
Balance at beginning of period   230 97  
Depreciation for the year   124 137  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 345 345 230 97
Mining assets [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   69,786    
Balance at end of period 100,592 100,592 69,786  
Depreciation for the year 856      
Mining assets [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   82,154 73,914  
Additions* [1]   0 0  
Impairments@   (872) [2] (8,518) [3]  
Reallocations between asset classes   37,116 15,886  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     872  
Foreign exchange movement   0 0  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 118,398 118,398 82,154 73,914
Mining assets [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   (21) (532)  
Foreign exchange movement   0 0  
Balance at beginning of period   12,368 8,910  
Depreciation for the year   5,459 3,990  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 17,806 17,806 12,368 8,910
Assets under construction and decommissioning assets [member]        
Statement Line Items [Line Items]        
Balance at beginning of period [4]   45,760    
Balance at end of period [4] 34,842 34,842 45,760  
Assets under construction and decommissioning assets [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   46,453 35,476  
Additions* [1]   28,276 31,711  
Impairments@   0 [2] 0 [3]  
Reallocations between asset classes   (39,099) (20,734)  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   (2) 0  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 35,628 35,628 46,453 35,476
Assets under construction and decommissioning assets [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@ [4]   0 0  
Foreign exchange movement [4]   0 0  
Balance at beginning of period [4]   693 600  
Depreciation for the year [4]   93 93  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period [4] 786 786 693 600
Plant and equipment [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   41,228    
Balance at end of period 35,625 35,625 41,228  
Depreciation for the year 1,302      
Plant and equipment [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   70,485 64,319  
Additions* [1]   538 3,049  
Impairments@   (36) [2] (998) [3]  
Reallocations between asset classes   491 4,089  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   0 26  
Disposals   (33)    
Reallocate to assets held for sale   0    
Balance at end of period 71,445 71,445 70,485 64,319
Plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   (10) (775)  
Foreign exchange movement   0 0  
Balance at beginning of period   29,257 25,505  
Depreciation for the year   6,573 4,527  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 35,820 35,820 29,257 25,505
Fixtures and fittings [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   463    
Balance at end of period 606 606 463  
Fixtures and fittings [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   1,563 1,342  
Additions* [1]   335 243  
Impairments@   0 [2] 0 [3]  
Reallocations between asset classes   0 0  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   (37) (22)  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 1,861 1,861 1,563 1,342
Fixtures and fittings [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   0 0  
Foreign exchange movement   (30) (21)  
Balance at beginning of period   1,100 958  
Depreciation for the year   185 163  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 1,255 1,255 1,100 958
Motor vehicles [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   469    
Balance at end of period 504 504 469  
Motor vehicles [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   3,314 3,169  
Additions* [1]   294 147  
Impairments@   0 [2] 0 [3]  
Reallocations between asset classes   0 0  
Acquisition of Bilboes oxide assets (Tribute) (note 5)     0  
Foreign exchange movement   (3) (2)  
Disposals   0    
Reallocate to assets held for sale   0    
Balance at end of period 3,605 3,605 3,314 3,169
Motor vehicles [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   0 0  
Foreign exchange movement   (2) (2)  
Balance at beginning of period   2,845 2,631  
Depreciation for the year   258 216  
Accumulated depreciation for assets reallocated to assets held for sale   0    
Balance at end of period 3,101 3,101 2,845 2,631
Solar plant [member]        
Statement Line Items [Line Items]        
Balance at beginning of period   14,138    
Balance at end of period 0 0 14,138  
Solar plant [member] | Gross carrying amount [member]        
Statement Line Items [Line Items]        
Balance at beginning of period [5]   14,138 1,940  
Additions* [1],[5]   163 12,198  
Impairments@ [5]   0 [2] 0 [3]  
Reallocations between asset classes [5]   0 0  
Acquisition of Bilboes oxide assets (Tribute) (note 5) [5]     0  
Foreign exchange movement [5]   0 0  
Disposals [5]   0    
Reallocate to assets held for sale [5]   (14,301)    
Balance at end of period [5] 0 0 14,138 1,940
Solar plant [member] | Accumulated depreciation, amortisation and impairment [member]        
Statement Line Items [Line Items]        
Impairments@   0 0  
Foreign exchange movement   0 0  
Balance at beginning of period   0 0  
Depreciation for the year   782 0  
Accumulated depreciation for assets reallocated to assets held for sale   (782)    
Balance at end of period $ 0 $ 0 $ 0 $ 0
[1] Included in additions is the change in estimate for the decommissioning asset of $1,962 (2022: ($468))
[2] On June 27, 2023 the decision was taken to place the Bilboes oxide mine on care and maintenance as the cost related to removing the waste and accessing the orebody could exceed the benefit from the gold revenues to be received. The impairment loss that was recognised amounted to a carrying value of $851 on impairing the Bilboes oxide asset classified under mine development, infrastructure and other. Mining and metallurgical processing continued at the Bilboes oxide mine until the end of September 2023 when the contract miner's notice period came to an end. Leaching of material that has already been deposited on the leach pad will continue while the revenue from these activities contributes to the cost of the asset. Oxide mining and processing will resume when the stripping of the waste for the sulphide project commences and can be economically justified.
[3] 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 condition. The carrying amount for these impaired assets were impaired to $Nil.
[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 commenced on February 2, 2023 and the power purchase agreement, between Caledonia Mining Services (Private) Limited and Blanket Mine, became effective. From September 28, 2023 the solar plant is classified as held for sale. In December 2022, the Caledonia board approved a proposal for Caledonia Mining Services (Private) Limited (which owns the solar plant) to issue loan notes pursuant to a loan note instrument (“bonds”) up to a value of $12 million. The decision was taken in order to optimise the capital structure of the Group and provide additional debt instruments to the Zimbabwean financial market. Refer to note 30.2 for more information on these loan notes.