v3.19.3.a.u2
Income Taxes - Provision for Income Tax Recovery/Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]    
Expected income tax recovery at Canadian statutory income tax rate of 26.51% (2018 - 26.51%) $ (25,400) $ (17,113)
Permanent differences 74,024 16,057
Foreign tax rate differential 1,770 1,726
Tax credits earned during the year (1,571) 0
Other items (1,468) (88)
Change in valuation allowance (18,328) (582)
Provision for income taxes 29,027 0
Operating Loss Carryforwards [Line Items]    
Loss before income taxes $ (95,815) $ (64,553)
Canada Revenue Agency    
Operating Loss Carryforwards [Line Items]    
Canadian statutory income tax rate 26.51% 26.51%