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v3.23.1

Note 5 - Bilboes (Details Textual) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended | 20 Months Ended
--- | --- | --- | --- | ---
Jan. 06, 2023 USD ($) $ / shares shares | Jul. 21, 2022 USD ($) shares | Dec. 31, 2023 oz | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Aug. 31, 2025 oz
Statement Line Items [Line Items] |  |  |  |  |  |  |
Total property, plant and equipment |  |  |  | $ 178,983 | $ 149,102 |  |
Other expenses |  |  |  | 11,782 | $ 7,136 | $ 5,315 |
Assets of Bilboes Gold Limited [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Acquisition, number of shares issuable (in shares) | shares |  | 5,123,044 |  |  |  |  |
Percentage of net smelter royalty |  | 1.00% |  |  |  |  |
Major purchases of assets [member] | Assets of Bilboes Gold Limited [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Acquisition, number of shares issued (in shares) | shares | 4,425,797 |  |  |  |  |  |
Shares issued or issuable, price per share (in dollars per share) | $ / shares | $ 12.82 |  |  |  |  |  |
Issue of equity | $ 56,740 |  |  |  |  |  |
Acquisition, escrow shares issuable (in shares) | shares | 441,095 |  |  |  |  |  |
Acquisition, deferred consideration shares issuable (in shares) | shares | 256,152 |  |  |  |  |  |
Acquisition, maximum deferred consideration shares in event of increase (in shares) | shares | 5,497,293 |  |  |  |  |  |
Acquisition, consideration issued and issuable | $ 65,677,424 |  |  |  |  |  |
Caledonia Holdings Zimbabwe (Private) Limited [member] | Bilboes Holdings (Private) Limited [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Tribute agreement, percentage of revenue to be received |  | 100.00% |  |  |  |  |
Tribute agreement, rate of return |  | 25.00% |  |  |  |  |
Tribute agreement, stated purchase price |  | $ 0 |  |  |  |  |
Prepayments |  |  |  | 877 |  |  |
Other expenses |  |  |  | 830 |  |  |
Current advances to suppliers |  |  |  | $ 802 |  |  |
Caledonia Holdings Zimbabwe (Private) Limited [member] | Bilboes Holdings (Private) Limited [member] | Oxide plant [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Property, plant and equipment, expenditures recognised in course of its construction |  | 872 |  |  |  |  |
Total property, plant and equipment |  | $ 872 |  |  |  |  |
Caledonia Holdings Zimbabwe (Private) Limited [member] | Bilboes Holdings (Private) Limited [member] | Entering into significant commitments or contingent liabilities [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Tribute agreement, estimated mass of gold production (Ounce) | oz |  |  |  |  |  |  | 20,000
Caledonia Holdings Zimbabwe (Private) Limited [member] | Bilboes Holdings (Private) Limited [member] | Bottom of range [member] | Entering into significant commitments or contingent liabilities [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Tribute agreement, estimated mass of gold production (Ounce) | oz |  |  | 12,500 |  |  |  |
Caledonia Holdings Zimbabwe (Private) Limited [member] | Bilboes Holdings (Private) Limited [member] | Top of range [member] | Entering into significant commitments or contingent liabilities [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Tribute agreement, estimated mass of gold production (Ounce) | oz |  |  | 17,000 |  |  |  |

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