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v3.25.2

Warrants - Fair value measurements assumptions of the warrants (Details) | Jun. 25, 2025 $ / shares USD ($) Y shares | Jun. 10, 2025 $ / shares Y shares | May 30, 2025 USD ($) $ / shares | May 22, 2025 $ / shares Y shares
--- | --- | --- | --- | ---
Class C Warrants |  |  |  |
Warrants |  |  |  |
Number of warrants issued | shares | 1,003,334 | 6,666,666 |  | 2,333,333
Fair value per warrant | $ 3.88 | $ 2.15 |  | $ 2.18
Class C Warrants | Exercise price |  |  |  |
Warrants |  |  |  |
Measurement input | 4.5 | 4.5 |  | 4.5
Class C Warrants | Share price |  |  |  |
Warrants |  |  |  |
Measurement input | 7.49 | 4.24 |  | 4.3
Class C Warrants | Volatility |  |  |  |
Warrants |  |  |  |
Measurement input | 1.0114 | 1.1849 |  | 1.1849
Class C Warrants | Term (years) |  |  |  |
Warrants |  |  |  |
Measurement input | Y | 2.88 | 2.92 |  | 2.92
Class C Warrants | Risk-free rate |  |  |  |
Warrants |  |  |  |
Measurement input | 0.0367 | 0.0387 |  | 0.0387
Class C Warrants | Dividend yield |  |  |  |
Warrants |  |  |  |
Measurement input | 0 | 0 |  | 0
Korea Zinc Warrants | Exercise price |  |  |  |
Warrants |  |  |  |
Measurement input | 7 |  |  |
Korea Zinc Warrants | Share price |  |  |  |
Warrants |  |  |  |
Measurement input | 7.49 |  |  |
Korea Zinc Warrants | Volatility |  |  |  |
Warrants |  |  |  |
Measurement input | 1.0055 |  |  |
Korea Zinc Warrants | Term (years) |  |  |  |
Warrants |  |  |  |
Measurement input | $ | 3 |  |  |
Korea Zinc Warrants | Risk-free rate |  |  |  |
Warrants |  |  |  |
Measurement input | 0.0367 |  |  |
Korea Zinc Warrants | Dividend yield |  |  |  |
Warrants |  |  |  |
Measurement input | 0 |  |  |
Nauru Warrants | Exercise price |  |  |  |
Warrants |  |  |  |
Measurement input |  |  | 4.72 |
Nauru Warrants | Share price |  |  |  |
Warrants |  |  |  |
Measurement input |  |  | 4.47 |
Nauru Warrants | Volatility |  |  |  |
Warrants |  |  |  |
Measurement input |  |  | 1.1471 |
Nauru Warrants | Term (years) |  |  |  |
Warrants |  |  |  |
Measurement input | $ |  |  | 5 |
Nauru Warrants | Risk-free rate |  |  |  |
Warrants |  |  |  |
Measurement input |  |  | 0.0389 |
Nauru Warrants | Dividend yield |  |  |  |
Warrants |  |  |  |
Measurement input |  |  | 0 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
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- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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