Note 14 - Cash Dividend and Declared Dividends (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Payments of Ordinary Dividends, Common Stock	$ 0	$ 195,000	$ 0	$ 388,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.02		$ 0.02