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Disaggregation of revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 69,731 | $ 102,368
Products transferred at a point in time |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 59,734 | 78,769
Products and services transferred over time |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 9,997 | 23,599
Bus |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 44,163 | 29,265
Truck |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,714 | 10,961
Rail |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,647 | 19,100
Marine |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,866 | 7,331
HD Mobility subtotal |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 53,390 | 66,657
Stationary |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 12,757 | 21,707
Emerging Markets and Other |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,584 | 14,004
Europe |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 47,153 | 48,958
North America |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 17,997 | 37,736
China |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,631 | 11,980
Rest of World |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 1,950 | $ 3,694

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_114&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_113_a&doctype=Standard -URIDate 2024-03-27 + Details
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