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STOCK BASED COMPENSATION (Details) - Stock options outstanding and exercisable under the 2010 Share Plan - 2010 Share Plan [Member] - $ / shares
6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Range Of Exercise Prices $0.67 [Member]    
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Options Outstanding, Number 938,000 943,000
Options Outstanding,Weighted Average Remaining Contractual Life 6 years 69 days 7 years 32 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) $ 0.67 $ 0.67
Options Exercisable, Number 776,750 556,059
Options Exercisable,Weighted Average Remaining Contractual Life 5 years 284 days 5 years 350 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) $ 0.67 $ 0.67
Range Of Exercise Prices $2.27 To $3.01 [Member]    
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Options Outstanding, Number 610,134  
Options Outstanding,Weighted Average Remaining Contractual Life 4 years 25 days  
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) $ 2.58  
Options Exercisable, Number 610,134  
Options Exercisable,Weighted Average Remaining Contractual Life 4 years 25 days  
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) $ 2.58  
Range Of Exercise Prices $3.46 To $7.00 [Member]    
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Options Outstanding, Number 474,534  
Options Outstanding,Weighted Average Remaining Contractual Life 8 years 226 days  
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) $ 4.13  
Options Exercisable, Number 193,284  
Options Exercisable,Weighted Average Remaining Contractual Life 7 years 233 days  
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) $ 4.57  
Range Of Exercise Prices $2.27 To $7.00 [Member]    
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Options Outstanding, Number   781,446
Options Outstanding,Weighted Average Remaining Contractual Life   5 years 47 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)   $ 2.79
Options Exercisable, Number   556,200
Options Exercisable,Weighted Average Remaining Contractual Life   4 years 284 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)   $ 2.90