Intangible Assets and Goodwill - Other Intangible Assets (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about intangible assets [line items]    
Intangible assets, beginning balance $ 11,207 $ 1,611
Additions 0 9,596
Intangible assets, ending balance 11,207 11,207
OGBC [member]    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets, beginning balance 1,611 1,611
Additions 0 0
Intangible assets, ending balance 1,611 1,611
Peace Naturals [member]    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets, beginning balance 9,596 0
Additions 0 9,596
Intangible assets, ending balance $ 9,596 $ 9,596