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Note 18 - Exploration and Evaluation Assets - Exploration and Evaluation Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Statement Line Items [Line Items]    
Balance at beginning of period $ 8,648 $ 6,768
- Mining claims acquired 7,844 4,000
Decommissioning asset acquired   135
- Consumables and drilling 1,206 1,218
- Contractor 4 117
- Labour 308 208
- Power 36 39
Impairment * [1] (467) (3,837)
Balance 17,579 8,648
Motapa [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 0 0
- Mining claims acquired 7,844 0
Decommissioning asset acquired   0
- Consumables and drilling 0 0
- Contractor 0 0
- Labour 0 0
- Power 0 0
Impairment * [1] 0 0
Balance 7,844 0
Maligreen [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 4,196 0
- Mining claims acquired 0 4,000
Decommissioning asset acquired   135
- Consumables and drilling 1,170 14
- Contractor 0 0
- Labour 260 47
- Power 0 0
Impairment * [1] 0 0
Balance 5,626 4,196
Connemara North [Member]    
Statement Line Items [Line Items]    
Balance at beginning of period 463 300
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 0 71
- Contractor 4 51
- Labour 0 41
- Power 0 0
Impairment * [1] (467) 0
Balance 0 463
Glen Hume [Member]    
Statement Line Items [Line Items]    
Balance at beginning of period 0 2,661
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 0 1,074
- Contractor 0 42
- Labour 0 60
- Power 0 0
Impairment * [1] 0 (3,837)
Balance 0 0
GG [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 3,618 3,523
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 36 16
- Contractor 0 0
- Labour 37 46
- Power 32 33
Impairment * [1] 0 0
Balance 3,723 3,618
Sabiwa [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 290 284
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 0 0
- Contractor 0 0
- Labour 0 0
- Power 4 6
Impairment * [1] 0 0
Balance 294 290
Abercorn [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 16 0
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 0 12
- Contractor 0 0
- Labour 11 4
- Power 0 0
Impairment * [1] 0 0
Balance 27 16
Valentine [member]    
Statement Line Items [Line Items]    
Balance at beginning of period 65 0
- Mining claims acquired 0 0
Decommissioning asset acquired   0
- Consumables and drilling 0 31
- Contractor 0 24
- Labour 0 10
- Power 0 0
Impairment * [1] 0 0
Balance $ 65 $ 65
[1] Caledonia has completed sufficient work to establish that the potential orebody at the Glen Hume and Connemara North properties will not meet Caledonia’s requirements in terms of size, grade and width. Accordingly, Caledonia will not exercise the option to acquire these properties.