Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.20.4
Income Taxes - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Operating Loss Carryforwards [Line Items]  
Increase in valuation allowance $ 30.3
Operating loss carryforwards 307.8
Domestic Tax Authority  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 272.4
Canada Investment Tax Credits and British Columbia Scientific Research and Experimental Development | Domestic Tax Authority  
Operating Loss Carryforwards [Line Items]  
Tax credit carryforward 3.9
United States | Foreign Tax Authority  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 31.4