Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Research and Development Expense [Member]
Share-based payment arrangement, expense	$ 771	$ 1,688	$ 3,014	$ 2,425
General and Administrative Expense [Member]
Share-based payment arrangement, expense	$ 667	$ 1,500	$ 2,460	$ 2,800