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Income taxes - Schedule of Reconciliation of Canadian Federal Statutory Income Tax Rates to Effective Tax Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Amount |  |  |
Net loss before income taxes | $ (177,595) | $ (200,395) | $ (174,029)
Canadian Federal statutory income tax rate |  | (54,107) | (46,988)
Change due to SR&ED | (6,002) | (8,224) | (7,428)
Change in valuation allowance | 12,321 | 15,205 | 11,485
Stock-based compensation | 11,863 |  |
Other | 252 | 77 | (395)
Provincial taxes net of Federal benefit | (1,134) |  |
Income tax recovery | $ (31,183) | $ (37,538) | $ (27,631)
Percent |  |  |
Canadian Federal statutory income tax rate |  | 27.00% | 27.00%
Change due to SR&ED | 3.40% |  |
Changes in valuation allowance | (6.90%) |  |
Stock-based compensation | (6.60%) |  |
Other | (0.10%) |  |
Provincial taxes net of Federal benefit | 0.60% |  |
Effective tax rate | 17.50% |  |
Canada |  |  |
Amount |  |  |
Canadian Federal statutory income tax rate | $ (44,399) |  |
Percent |  |  |
Canadian Federal statutory income tax rate | 25.00% |  |
United States |  |  |
Amount |  |  |
Change in valuation allowance | $ (2,775) |  |
Other | $ 1,101 |  |
Percent |  |  |
Changes in valuation allowance | 1.60% |  |
Other | (0.60%) |  |
Other Foreign Jurisdictions |  |  |
Amount |  |  |
Change in valuation allowance and other | $ (2,410) |  |
Percent |  |  |
Change in valuation allowance and other | 1.20% |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.1.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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