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

Financial instruments (Schedule of Contractual Maturities for Long-Term Debt Repayable) (Details)

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Financial instruments (Schedule of Contractual Maturities for Long-Term Debt Repayable) (Details) - CAD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities $ 7,575 $ 2,760
Amounts due to directors 49 21
Long-term leases 1,308
Long-term debt 8,069 $ 6,476
Total [Member]    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 7,575  
Amounts due to directors 49  
Short term and low value leases 66  
Long-term leases 2,398  
Long-term debt 15,612  
Financial liabilities 25,700  
Year 1 [Member]    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 7,575  
Amounts due to directors 49  
Short term and low value leases 18  
Long-term leases 275  
Long-term debt 264  
Financial liabilities 8,181  
Years 2 to 3 [Member]    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities  
Amounts due to directors  
Short term and low value leases 27  
Long-term leases 533  
Long-term debt 5,324  
Financial liabilities 5,884  
Years 4 to 5 [Member]    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities  
Amounts due to directors  
Short term and low value leases 21  
Long-term leases 518  
Long-term debt 142  
Financial liabilities 681  
After 5 years [Member]    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities  
Amounts due to directors  
Long-term leases 1,072  
Long-term debt 9,882  
Financial liabilities $ 10,954