Note 13 - Per Share Calculation - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Numerator for basic and diluted earnings per share	$ 19,950	$ 17,360
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	6,389	6,225
Share based payments (in shares)	112	78
Denominator for diluted earnings per share – weighted average shares outstanding (in shares)	6,501	6,303
Net income per common share (in dollars per share)	$ 3.12	$ 2.79
Diluted earnings per share (in dollars per share)	$ 3.07	$ 2.75