Financial instruments - Investments (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | $ (16,877) | $ (9,024) |
| Green Hydrogen | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | 15 | 1,422 |
| Forsee Power | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | (14,865) | (10,474) |
| Wisdom Motor | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | 0 | 0 |
| Quantron AG | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | 150 | 0 |
| HyCap Fund | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | (1,597) | 26 |
| CleanH2 Fund | ||
| Disclosure of financial assets [line items] | ||
| Mark-to-market gain (loss) on financial assets | $ (580) | $ 2 |