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Subsequent Events - Additional Information (Detail)
$ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands
Mar. 10, 2021
shares
Feb. 05, 2021
USD ($)
shares
Feb. 05, 2021
CAD ($)
shares
Jan. 20, 2021
USD ($)
$ / shares
shares
Jan. 20, 2021
CAD ($)
shares
Sep. 10, 2020
$ / shares
shares
Feb. 05, 2021
CAD ($)
Jan. 20, 2021
$ / shares
shares
Dec. 31, 2020
shares
Dec. 31, 2019
shares
Subsequent Event [Line Items]                    
Purchase price | $ / shares           $ 5.30        
Common Stock, Shares, Outstanding                 66,911,811 52,656,669
Common Stock, Shares, Issued                 66,911,811 52,656,669
Shares issued in pubic offering, net of issuance costs (in shares)           9,396,226        
Class of warrant or right, exercise price of warrants or rights | $ / shares           $ 5.80        
Warrants exercisable beginning date           Mar. 10, 2021        
Warrants exercisable expiration date           Sep. 10, 2025        
Description of units sold           Each unit that was sold consists of one common share of the Company and a one-half (0.5) of a warrant to purchase a common share of the Company        
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Common Stock, Shares, Outstanding       77,798,908       77,798,908    
Common Stock, Shares, Issued       77,798,908       77,798,908    
Accrued interest   $ 487         $ 622      
Subsequent Event [Member] | Warrant [Member]                    
Subsequent Event [Line Items]                    
Stock issued during period shares stock options exercised 1,773,585                  
Subsequent Event [Member] | Agreement [Member]                    
Subsequent Event [Line Items]                    
Payment of Promissory Note   $ 15,600 $ 19,900              
Subsequent Event [Member] | Pure Sunfarms | Agreement [Member]                    
Subsequent Event [Line Items]                    
Shares acquired accounted under equity method   36,958,500 36,958,500              
Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Sale of Stock, Number of Shares Issued in Transaction       10,887,097 10,887,097          
Purchase price | (per share)       $ 12.40       $ 15.70    
Sale of Stock, Consideration Received on Transaction       $ 135,000 $ 171,000