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Intangible assets - Acquired (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | $ 5,214 | $ 20,788 | $ 3,764
ERP management reporting software system |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | 2,714 | 3,631 |
Intellectual property acquired from UTC | Acquired patents, know-how and in-process research & development |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | 0 | 74 |
Intellectual property acquired from Ballard Motive Solutions (notes 7 and 27) | Acquired patents, know-how and in-process research & development |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | $ 2,500 | $ 17,083 |

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