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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (Parentheticals) - USD ($)
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Research and Development Expense [Member]    
Non-cash share-based compensation expenses $ 397,523 $ 1,573,779
Selling, General and Administrative Expenses [Member]    
Non-cash share-based compensation expenses $ 623,811 $ 1,176,385