Note 15 - Stock-based Compensation Plans - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options outstanding (in shares)	131,014
Stock options outstanding, weighted average exercise price (in dollars per share)	$ 31.19
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	0
Granted, weighted average exercise price (in dollars per share)	$ 0
Exercised (in shares)	(2,225)
Exercised, weighted average exercise price (in dollars per share)	$ 36.97
Forfeited (in shares)	0
Forfeited, weighted average exercise price (in dollars per share)	$ 0
Expired (in shares)	0
Expired, weighted average exercise price (in dollars per share)	$ 0
Stock options outstanding (in shares)	128,789	131,014
Stock options outstanding, weighted average exercise price (in dollars per share)	$ 31.09	$ 31.19
Stock options outstanding, weighted average contractual life (Year)	2 years 7 months 6 days
Stock options outstanding, intrinsic value	$ 11,479,853
Stock options exercisable at end of period (in shares)	128,789
Stock options exercisable at end of period, weighted average exercise price (in dollars per share)	$ 31.09
Stock options exercisable, weighted average contractual life (Year)	2 years 7 months 6 days
Stock options exercisable, intrinsic value	$ 11,479,583