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Income taxes - Net Deferred Tax (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Mar. 31, 2023
Disclosure of deferred tax [Line Items]    
Deferred tax assets $ 552 $ 301
Net deferred tax assets 552 301
Before offset amount    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 57,692 80,151
Deferred tax liabilities (57,140) (79,850)
Property and equipment    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 3,924 3,179
Deferred tax liabilities (411) (562)
Intangible assets    
Disclosure of deferred tax [Line Items]    
Deferred tax liabilities (46,697) (67,972)
Lease liabilities    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 5,657 6,045
Lease right-of-use assets    
Disclosure of deferred tax [Line Items]    
Deferred tax liabilities (4,213) (5,028)
Non-capital losses carried forward    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 24,741 49,467
Deferred revenue    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 421 530
Interest expenses carried forward    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 0 3,170
Long-term incentive plan    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 8,844 6,211
Capitalized R&D costs    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 12,535 7,542
Other    
Disclosure of deferred tax [Line Items]    
Deferred tax assets 1,570 4,007
Deferred tax liabilities $ (5,819) (6,288)
Long-Term incentive plan and capitalized R&D costs    
Disclosure of deferred tax [Line Items]    
Deferred tax assets   $ 17,760