v3.10.0.1
Income Taxes - Provision for Income Tax Recovery/Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]    
Comprehensive loss $ (80,204) $ (34,742)
Expected income tax expense at Canadian statutory income tax rate of 26.51% (2017 - 26.51%) (21,269) (9,211)
Permanent differences 16,057 13,015
Share issuance costs (8,051) (4,502)
Stock-based compensation benefits (3,132) (4,722)
State tax losses (659) (4,875)
Other items (88) 367
Foreign tax rate differential 1,726 711
Increase in valuation allowance 15,416 9,217
Provision for income tax (recovery) expense $ 0 $ 0
Canada Revenue Agency    
Operating Loss Carryforwards [Line Items]    
Canadian statutory income tax rate 26.51% 26.51%