XML 106 R86.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other long term obligations - Other liabilities and obligations (Details) - CAD
CAD in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Lease Incentive, Payable [Roll Forward]        
Balance, beginning of year CAD 38 CAD 145    
Amortization of deferred lease inducements (28) (107)    
Balance, end of year 38 145 CAD 10 CAD 38
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
Balance, beginning of year 678 617    
Accretion expense 66 61    
Balance, end of year CAD 744 678    
Estimated undiscounted cash flows required to settle obligation     CAD 1,084 CAD 1,084
Credit adjusted risk-free rate assumed in measuring the asset retirement obligation (percent) 9.42%      
Deferred Gain on Sale Leaseback [Roll Forward]        
Balance, beginning of year CAD 3,199 780    
Addition 5,155 2,792    
Amortization of deferred gain on sale-leaseback (700) (373)    
Balance, end of year CAD 7,654 CAD 3,199