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Fair value of financial instruments (Details 1) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
 [1]
Statement Line Items [Line Items]      
Unrealized gain on investment portfolio $ (294) [1]
Level 3 [Member]      
Statement Line Items [Line Items]      
Opening balance December 31, 2018  
Acquired in business combination with Difference 22,648  
Disposal (2,100)  
Repayment of debenture (14)  
Unrealized gain on investment portfolio 157  
Balance, end of period $ 20,691  
[1] The consolidated statement of operations and comprehensive loss for fiscal year 2019 reflects the adoption of IFRS 16 on January 1, 2019, and for fiscal year 2018 reflects the adoption of IFRS 9 on January 1, 2018. The comparative information has not been restated.