Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Property and equipment - Property, Plant and Equipment Rollforward (Details)

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Property and equipment - Property, Plant and Equipment Rollforward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Changes in property, plant and equipment [abstract]    
As of beginning of period $ 41 $ 31
Additions 512 30
Amortization (159) (20)
Derecognition of right-of-use asset (301)  
Net book value 93 41
Cost    
Changes in property, plant and equipment [abstract]    
As of beginning of period 169  
Net book value 675 169
Accumulated amortization    
Changes in property, plant and equipment [abstract]    
As of beginning of period (128)  
Net book value (281) (128)
Derecognition of right-of-use asset    
Changes in property, plant and equipment [abstract]    
Net book value (301)  
Computer equipment and software    
Changes in property, plant and equipment [abstract]    
As of beginning of period 39 28
Additions 87 30
Amortization (33) (19)
Derecognition of right-of-use asset 0  
Net book value 93 39
Computer equipment and software | Cost    
Changes in property, plant and equipment [abstract]    
As of beginning of period 94  
Net book value 175 94
Computer equipment and software | Accumulated amortization    
Changes in property, plant and equipment [abstract]    
As of beginning of period (55)  
Net book value (82) (55)
Computer equipment and software | Derecognition of right-of-use asset    
Changes in property, plant and equipment [abstract]    
Net book value 0  
Office equipment and furniture    
Changes in property, plant and equipment [abstract]    
As of beginning of period 2 3
Additions 0 0
Amortization (2) (1)
Derecognition of right-of-use asset 0  
Net book value 0 2
Office equipment and furniture | Cost    
Changes in property, plant and equipment [abstract]    
As of beginning of period 41  
Net book value 41 41
Office equipment and furniture | Accumulated amortization    
Changes in property, plant and equipment [abstract]    
As of beginning of period (39)  
Net book value (41) (39)
Office equipment and furniture | Derecognition of right-of-use asset    
Changes in property, plant and equipment [abstract]    
Net book value 0  
Leasehold improvements    
Changes in property, plant and equipment [abstract]    
As of beginning of period 0 0
Additions 0 0
Amortization 0 0
Derecognition of right-of-use asset 0  
Net book value 0 0
Leasehold improvements | Cost    
Changes in property, plant and equipment [abstract]    
As of beginning of period 34  
Net book value 34 34
Leasehold improvements | Accumulated amortization    
Changes in property, plant and equipment [abstract]    
As of beginning of period (34)  
Net book value (34) (34)
Leasehold improvements | Derecognition of right-of-use asset    
Changes in property, plant and equipment [abstract]    
Net book value 0  
Right-of-use Asset    
Changes in property, plant and equipment [abstract]    
As of beginning of period 0 0
Additions 425 0
Amortization (124) 0
Derecognition of right-of-use asset (301)  
Net book value 0 0
Right-of-use Asset | Cost    
Changes in property, plant and equipment [abstract]    
As of beginning of period 0  
Net book value 425 0
Right-of-use Asset | Accumulated amortization    
Changes in property, plant and equipment [abstract]    
As of beginning of period 0  
Net book value (124) $ 0
Right-of-use Asset | Derecognition of right-of-use asset    
Changes in property, plant and equipment [abstract]    
Net book value $ (301)