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Share capital (Narrative) (Details) - CAD ($)
 1 Months Ended 12 Months Ended
Nov. 04, 2019
Oct. 04, 2019
May 07, 2019
Oct. 16, 2019
Sep. 20, 2019
Apr. 24, 2019
Dec. 31, 2019
Dec. 31, 2018
Disclosure of classes of share capital [line items]                
Loss on change in fair value of derivative liability             $ 3,568,305  
Proceeds from issuance of shares             4,593,777 $ 44,987,422
Share issue costs             $ 32,705 $ 3,768,381
Solarvest BioEnergy Inc.                
Disclosure of classes of share capital [line items]                
Share price per share             $ 0.145  
Loss on change in fair value of derivative liability             $ 2,146,269  
Share Exchange Agreement | Pharmadrug Inc.                
Disclosure of classes of share capital [line items]                
Number of shares acquired           13,562,386    
Share price per share           $ 0.2212    
Class A shares                
Disclosure of classes of share capital [line items]                
Description of voting rights             The holders of Class A shares are entitled to 276,660 votes per class A share held.  
Class B shares                
Disclosure of classes of share capital [line items]                
Number of shares issued for debt settlement   3,735            
Value of shares issued for debt settlement   $ 25,000            
Description of reverse share split       October 16, 2019, the Company completed a reverse share split of 201 to 1 Class B Shares.        
Number of shares issued in private placement 228,670              
Share issue price per share $ 20.10              
Proceeds from issuance of shares $ 4,593,777              
Share issue costs $ 32,705              
Recognition of loss on change in fair value of derivative liability                
Issued on acquisition of net assets of Prismic Pharmaceuticals, Inc (shares)             510,940  
Class B shares | Share Exchange Agreement | Pharmadrug Inc.                
Disclosure of classes of share capital [line items]                
Number of shares issued in share exchange         61,892 65,577    
Value of shares issued in share exchange           $ 3,000,000    
Share issue price per share           $ 45.75    
Loss on change in fair value of derivative liability         $ 1,422,036      
Class B shares | Share Exchange Agreement | Solarvest BioEnergy Inc.                
Disclosure of classes of share capital [line items]                
Number of shares issued in share exchange     49,751