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Income tax (Details 4) - CAD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Property and equipment $ 8,202 $ 9,057 [1] $ 6,346
Intangible assets 21,257 18,658 [1]  
Convertible debentures 12,373 11,889  
Deferred Tax Assets [Member]      
Statement Line Items [Line Items]      
Property and equipment 2,103 2,250  
Right-of-use assets, net lease liability 388  
Intangible assets 3,205 4,368  
Debentures 595 1,658  
Convertible debentures 530  
Financing costs 1,509 2,390  
Research and development expenditures 1,437 1,163  
Other 21  
Deferred tax assets $ 9,767 $ 11,850  
[1] The consolidated statement of Financial position as at December 31, 2019 reflects the adoption of IFRS 16 on January 1, 2019. The comparative information has not been restated.