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

Property and equipment (Schedule of Property and Equipment Net Book Value) (Details)

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Property and equipment (Schedule of Property and Equipment Net Book Value) (Details) - CAD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment $ 2,883 $ 563 $ 316
Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 4,032 1,473  
Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment (1,149) (910)  
Computer equipment [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 96 66 43
Computer equipment [Member] | Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 275 205  
Computer equipment [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment (179) (139)  
Furniture and fixtures [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 163 27 17
Furniture and fixtures [Member] | Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 194 85  
Furniture and fixtures [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment (31) (58)  
Laboratory equipment [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 558 459 256
Laboratory equipment [Member] | Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 1,346 1,166  
Laboratory equipment [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment (788) (707)  
Leased premises [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 1,323
Leased premises [Member] | Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 1,417  
Leased premises [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment (94)  
Leasehold improvements and leased premises [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 743 11
Leasehold improvements and leased premises [Member] | Cost [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment 800 17  
Leasehold improvements and leased premises [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property and equipment $ (57) $ (6)