Note 1 - Business Activities and Summary of Significant Accounting Policies - Basic and Diluted Earnings Per Share (Details) - USD ($)	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Consolidated net income (A)	$ 6,181,000	$ (81,000)
Weighted average shares outstanding for basic earnings per share (B) (in shares)	9,978,683	9,678,822
Add effects of potentially dilutive securities - assumed exercise of stock options (in shares)	175,556	0
Weighted average shares outstanding for diluted earnings per share (C) (in shares)	10,154,239	9,678,822
Basic earnings per share (A)/(B) (in dollars per share)	$ 0.62	$ (0.01)
Diluted earnings per share (A)/(C) (in dollars per share)	$ 0.61	$ (0.01)