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Warrants (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 31, 2021
CAD ($)
$ / shares
shares
Oct. 31, 2020
CAD ($)
$ / shares
shares
Oct. 31, 2019
CAD ($)
$ / shares
shares
Jan. 27, 2020
$ / shares
shares
Class of Warrant Outstanding [Abstract]        
Number of warrants outstanding, beginning balance 131,064,114 43,677,333    
Number of warrants terminated (59,578,382) (1,600,000)    
Number of warrants expired   (4,252,620)    
Number of warrants exercised (54,268,198)      
Number of warrants outstanding, Ending balance 111,242,184 131,064,114 43,677,333  
Class of Warrant Outstanding, Value [Abstract]        
Warrants outstanding amount, beginning balance | $ $ 5,796 $ 6,609    
Re-class warrants on convertible debt to equity | $   (660)    
Value of warrants terminated | $ (5,457) (105)    
Value of warrants expired | $   (906)    
Value of warrants exercised | $ (2,110)      
Derivative financial liabilities on warrant exercise | $ (10,270)      
Warrants outstanding amount, ending balance | $ $ 10,724 $ 5,796 $ 6,609  
Warrants exercise price | $ / shares $ 2.5995 $ 0.4159 $ 0.6083  
Weighted average number of years to expiry 2 years 3 days 2 years 25 days 1 year 1 month 17 days  
Derivative liability | $ $ 1,693 $ 266    
Number of warrants exercisable 111,242,184      
Number of warrants converted 15      
Number of securities into which the warrant or right may be converted 1      
Unrealized gains (losses) on change in fair value of derivatives | $ $ (6,410)      
Unrealized gains (losses) on change in fair value of derivatives | $ $ (6,989) $ (459)    
Saturninus Partners        
Class of Warrant Outstanding, Value [Abstract]        
Warrants exercise price | $ / shares       $ 0.40
Number of securities into which the warrant or right may be converted       1
Meta Growth Corp.        
Class of Warrant Outstanding, Value [Abstract]        
Number of warrants exercisable 18.2      
Number of warrants converted 1      
Warrants expiring on September 3, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for services   300,000    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for services, value | $   $ 64    
Warrants exercise price | $ / shares   $ 0.3800    
Number of warrants converted   15    
Number of securities into which the warrant or right may be converted   1    
Fair value of warrants | $   $ 64    
Warrants expiring on September 3, 2021 | Share price | Pre-consolidation        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.37    
Warrants expiring on September 3, 2021 | Exercise price        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.38    
Warrants expiring on September 3, 2021 | Volatility        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   111    
Warrants expiring on November 12, 2021 One        
Class of Warrant Outstanding [Abstract]        
Warrants issued for services   3,500,000    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for services, value | $   $ 204    
Warrants exercise price | $ / shares   $ 0.3000    
Weighted average number of years to expiry   3 days    
Number of warrants converted   15    
Number of securities into which the warrant or right may be converted   1    
Fair value of warrants | $   $ 204    
Warrants expiring on November 12, 2021 One | Share price | Pre-consolidation        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.22    
Warrants expiring on November 12, 2021 One | Exercise price        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.30    
Warrants expiring on November 12, 2021 One | Dividend payment        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   0    
Warrants expiring on November 12, 2021 One | Volatility        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   70    
Warrants expiring on November 12, 2021 One | Risk free interest rate        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   1.6    
Warrants expiring on November 12, 2021 Two        
Class of Warrant Outstanding [Abstract]        
Warrants issued for services   1,000,000    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for services, value | $   $ 111    
Warrants exercise price | $ / shares   $ 0.3000    
Number of warrants converted   15    
Number of securities into which the warrant or right may be converted   1    
Fair value of warrants | $   $ 111    
Warrants expiring on November 12, 2021 Two | Share price | Pre-consolidation        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.22    
Warrants expiring on November 12, 2021 Two | Exercise price        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input | $ / shares   0.30    
Warrants expiring on November 12, 2021 Two | Volatility        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   111    
Warrants expiring on November 12, 2021 Two | Risk free interest rate        
Class of Warrant Outstanding, Value [Abstract]        
Warrant, measurement input   1.6    
Warrants expiring on November 14, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for conversion of debt   7,936,507    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for conversion of debt, value | $   $ 80    
Warrants exercise price | $ / shares   $ 0.5000    
Weighted average number of years to expiry   10 days    
Warrants expiring on December 4, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for conversion of debt   8,392,857    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for conversion of debt, value | $   $ 109    
Warrants exercise price | $ / shares   $ 0.5000    
Weighted average number of years to expiry   14 days    
Warrants expiring on December 12, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for conversion of debt   7,936,508    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for conversion of debt, value | $   $ 135    
Warrants exercise price | $ / shares   $ 0.5000    
Weighted average number of years to expiry   14 days    
Warrants expiring on January 26, 2022 | Saturninus Partners        
Class of Warrant Outstanding [Abstract]        
Warrants issued for acquisitions   3,750,000    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for acquisitions, value | $   $ 100    
Warrants exercise price | $ / shares   $ 0.4000    
Weighted average number of years to expiry   7 days    
Warrants expiring on December 31, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for conversion of debt   58,823,529    
Class of Warrant Outstanding, Value [Abstract]        
Warrants exercise price | $ / shares   $ 0.2550    
Weighted average number of years to expiry   3 months 18 days    
Derivative liability | $   $ 266    
Warrants expiring on September 30, 2021        
Class of Warrant Outstanding [Abstract]        
Warrants issued for debt   1,600,000    
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued on debt, value | $   $ 55    
Warrants exercise price | $ / shares   $ 0.3000    
Weighted average number of years to expiry   3 days    
Warrants expiring on December 14, 2021 | Meta Growth Corp.        
Class of Warrant Outstanding [Abstract]        
Warrants issued for acquisitions 741,600      
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for acquisitions, value | $ $ 3      
Warrants exercise price | $ / shares $ 1.3110      
Warrants expiring on February 6, 2023 | Meta Growth Corp.        
Class of Warrant Outstanding [Abstract]        
Warrants issued for acquisitions 40,076,411      
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for acquisitions, value | $ $ 2,616      
Warrants exercise price | $ / shares $ 0.3520      
Weighted average number of years to expiry 5 months 26 days      
Warrants expiring on April 11, 2023 | Meta Growth Corp.        
Class of Warrant Outstanding [Abstract]        
Warrants issued for acquisitions 4,120,000      
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued for acquisitions, value | $ $ 120      
Warrants exercise price | $ / shares $ 1.1040      
Weighted average number of years to expiry 21 days      
Warrants expiring on December 31, 2022        
Class of Warrant Outstanding, Value [Abstract]        
Derivative liability | $ $ 11,697      
Warrants expiring on February 22, 2024        
Class of Warrant Outstanding [Abstract]        
Warrants issued - equity financing 27,878,919      
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued - equity financing, value | $ $ 6,210      
Warrants exercise price | $ / shares $ 0.5800      
Weighted average number of years to expiry 6 months 18 days      
Warrants expiring on May 26, 2024        
Class of Warrant Outstanding [Abstract]        
Warrants issued - equity financing 21,207,720      
Class of Warrant Outstanding, Value [Abstract]        
Warrants issued - equity financing, value | $ $ 3,546      
Warrants exercise price | $ / shares $ 12.2500      
Weighted average number of years to expiry 10 days