XML 111 R97.htm IDEA: XBRL DOCUMENT v3.22.1
Income taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised $ 394,067 $ 253,813
Non-capital loss carryforwards 721,289 421,002
Previously stated    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised   218,801
With expiry    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 226,403 185,666
With expiry | Previously stated    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised   177,381
No expiry    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 167,664 68,147
No expiry | Previously stated    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised   41,420
Research and development    
Disclosure of income taxes [Line Items]    
Unused tax credits for which no deferred tax asset recognised 2,548 2,230
E-business    
Disclosure of income taxes [Line Items]    
Unused tax credits for which no deferred tax asset recognised 3,772 2,857
Canada    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised 60,237 46,412
Research and development expense, available for reduction of future taxable income 15,456 13,508
Non-capital loss carryforwards 151,096 73,737
Provision for tax refund receivable 3,933 3,146
Canada | Previously stated    
Disclosure of income taxes [Line Items]    
Deductible temporary differences for which no deferred tax asset is recognised   13,272
Non-capital loss carryforwards   65,452
United States    
Disclosure of income taxes [Line Items]    
Non-capital loss carryforwards $ 366,680 236,149
United States | Previously stated    
Disclosure of income taxes [Line Items]    
Non-capital loss carryforwards   $ 209,422