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Note 15 - Stock-based Compensation Plans - Stock Option Activity (Details) - USD ($)
12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Oct. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Stock options outstanding (in shares) 143,547    
Stock options outstanding, weighted average exercise price (in dollars per share) $ 34.63    
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) (12,533)    
Exercised, weighted average exercise price (in dollars per share) $ 70.55    
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) 131,014 143,547  
Stock options outstanding, weighted average exercise price (in dollars per share) $ 31.19 $ 34.63  
Stock options outstanding, weighted average contractual life (Year) 3 years 7 months 6 days    
Stock options outstanding, intrinsic value $ 18,977,000    
Stock options exercisable at end of period (in shares) 131,014    
Stock options exercisable at end of period, weighted average exercise price (in dollars per share) $ 31.19    
Stock options exercisable, weighted average contractual life (Year) 3 years 7 months 6 days    
Stock options exercisable, intrinsic value $ 18,977,000