Biological Assets and Inventory - Additional Information (Detail)
Plant in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2017
CAD ($)
kg
Plant
wk
g
l
Dec. 31, 2016
CAD ($)
kg
Plant
Disclosure of reconciliation of changes in biological assets [line items]    
Average number of weeks | wk 15  
Average harvest yield | g 182  
Sensitivity in value of biological assets due to change in assumptions | $ $ 9,693 $ 1,250
Percentage of completion 46.00% 50.00%
Expected canabis yield | kg 1,695,000 213,000
Number of plants that are biological assets | Plant 7,353 2,558
Work in process | kg 243 0
Canabis seeds | kg 0.288 0.298
Harvest yield per plant [member]    
Disclosure of reconciliation of changes in biological assets [line items]    
Percentage of decrease in harvest yield per plant 5.00%  
Sensitivity in value of biological assets due to change in assumptions | $ $ 181 $ 110
Sensitivity analysis [member]    
Disclosure of reconciliation of changes in biological assets [line items]    
Percentage of decrease in sale price per gram 5.00%  
Sensitivity in value of biological assets due to change in assumptions | $ $ 227 88
Sensitivity in value of inventories due to change in assumptions | $ $ 443 $ 68
Dry cannabis [member]    
Disclosure of reconciliation of changes in biological assets [line items]    
Finished goods | kg 815 236
Cannabis oils [member]    
Disclosure of reconciliation of changes in biological assets [line items]    
Finished goods | l 137