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Income taxes (Details 1) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes Details 1Abstract      
Canadian federal and provincial recovery of income taxes using statutory rate of 27% (2017 - 27%) $ (2,653) $ (5,946) $ (5,381)
Change in unrecognized deductible temporary differences and unused tax losses 4,534 6,098 4,397
Permanent differences and other (1,881) (152) 984
Provision for income taxes