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Stockholders' Equity (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2020
Jan. 31, 2020
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2019
Oct. 31, 2019
Stock options granted       1,000,000   1,000,000
Stock options purchase price per share           $ 5.43
Stock-based compensation $ 240,909 $ 248,031 $ 25,000 $ 488,940 $ 25,000 $ 476,899
Unrecognized stock compensation expense $ 1,544,431     $ 1,544,431    
Board of Directors [Member]            
Share-based compensation, options, number of shares authorized   1,000,000        
Five Board Members [Member]            
Stock options granted           59,000
Stock options purchase price per share           $ 5.43
Stock options expected term           P6Y
Stock options vesting period           12 months
Stock options aggregate grant date fair value           $ 233,050
Certain Officers and Employees [Member]            
Stock options granted           941,000
Stock options purchase price per share           $ 5.43
Stock options expected term           P6Y
Stock options vesting period           3 years
Stock options aggregate grant date fair value           $ 2,277,220