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Income taxes - Unrecognized Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised $ 644,606 $ 527,678
Deferred tax assets 697 0
Scientific research expenditures    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 122,742 110,548
Scientific research expenditures | Canada    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 122,742 110,548
Investments    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 9,357 0
Accrued warranty provision    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 0 1,619
Share issuance costs    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 33,100 19,765
Losses from operations carried forward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 219,326 151,620
Deferred tax assets 665 0
Losses from operations carried forward | Canada    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 131,514 66,306
Losses from operations carried forward | Germany    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 232 457
Losses from operations carried forward | United States    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 50,103 47,872
Losses from operations carried forward | Denmark    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 35,996 33,441
Losses from operations carried forward | Hong Kong    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 50 36
Losses from operations carried forward | United Kingdom    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 2,659 0
Investment tax credits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 42,939 39,052
Investment tax credits | Canada    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 42,939 39,052
Property, plant and equipment and intangible assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised 217,142 205,074
Research and development tax credits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets 32 0
Research and development tax credits | United Kingdom    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deferred tax assets $ 129 $ 0