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Financial instruments - Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | $ (14,788) | $ (12,897)
Forsee Power |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | (12,699) | (3,501)
Wisdom Motor |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | (2,200) | (4,900)
Quantron AG |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | (4,401) | (4,237)
HyCap Fund |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | 5,084 | 214
CleanH2 Fund |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | (360) | (473)
Templewater |  |
Disclosure of financial assets [line items] |  |
Mark-to-market gain (loss) on financial assets | $ (212) | $ 0

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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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