Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Research and Development Expense [Member]
Non-cash share-based compensation expenses	$ 394,842	$ 338,449	$ 1,250,497	$ 2,567,294
General and Administrative Expense [Member]
Non-cash share-based compensation expenses	$ 646,957	$ 492,449	$ 1,922,722	$ 2,335,218