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Intangible assets - Acquired (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | $ 20,788 | $ 3,764 | $ 5,687
ERP management reporting software system |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | 3,631 | 3,242 |
Intellectual property acquired from UTC | Acquired Intellectual Property |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | 74 | 522 |
Intellectual property acquired from Ballard Motive Solutions, net of amortization (note 7) | Acquired Intellectual Property |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets | $ 17,083 | $ 0 |

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