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Reconciliation of Liabilities Arising From Financing Activities - Schedule of Reconciliation of Liabilities Arising From Financing Activities (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disclosure Of Reconciliation Of Liabilities Arising From Financing Activities [Line Items]    
Liabilities arising from financing activities at beginning of period $ 10,330 $ 4,022
Non-cash changes cash flows (1,531) 2,801
Non-cash changes acquisition/ disposal (396) 3,507
Non-cash changes new leases 19  
Liabilities arising from financing activities at end of period 8,422 10,330
Long term Borrowings    
Disclosure Of Reconciliation Of Liabilities Arising From Financing Activities [Line Items]    
Liabilities arising from financing activities at beginning of period 9,273 3,457
Non-cash changes cash flows (1,195) 2,813
Non-cash changes acquisition/ disposal   3,003
Liabilities arising from financing activities at end of period 8,078 9,273
Finance Lease Obligations    
Disclosure Of Reconciliation Of Liabilities Arising From Financing Activities [Line Items]    
Liabilities arising from financing activities at beginning of period 1,057 565
Non-cash changes cash flows (336) (12)
Non-cash changes acquisition/ disposal (396) 504
Non-cash changes new leases 19  
Liabilities arising from financing activities at end of period $ 344 $ 1,057