v3.26.1
Note 15 - Common Stock (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Feb. 27, 2026
USD ($)
Apr. 30, 2026
USD ($)
shares
Jan. 31, 2026
USD ($)
shares
Apr. 30, 2025
USD ($)
shares
Jan. 31, 2025
USD ($)
shares
Apr. 30, 2026
USD ($)
Item
$ / shares
shares
Apr. 30, 2025
USD ($)
$ / shares
shares
Apr. 11, 2025
USD ($)
Jan. 11, 2018
Aug. 15, 2008
Class of Stock [Line Items]                    
Common Stock Dividends Percent of Increase from Class A to Class B   110.00%       110.00%        
Conversion of Stock From Class B to Class A Conversion Ratio   1                
Shareholder Ownership Percentage of Increase                 50.00%  
Number of Rights                   1
Treasury Stock, Value, Acquired, Cost Method   $ 9,545 $ 9,000 $ 12,346 $ 18,050          
Minimum [Member]                    
Class of Stock [Line Items]                    
Shareholder Ownership Percentage                 5.00%  
Common Class A [Member]                    
Class of Stock [Line Items]                    
Common Stock Voting Rights Votes per Share Number | Item           1        
Shareholder Ownership Percentage                   4.90%
Shareholders Pre Existing Ownership Percentage                 5.00%  
Shareholders Current Ownership Percentage                 5.00%  
Shareholders Ownership Percentage on Transfers                 5.00%  
Shareholders Ownership Percentage Threshold                 5.00%  
Share Repurchase Program, Remaining Authorized, Amount   $ 57,900       $ 57,900        
Stock Repurchase Program, Authorized Amount $ 67,400             $ 30,600    
Stock Repurchase Program, Authorized Amount Incremental Increase $ 50,000                  
Common Class B [Member]                    
Class of Stock [Line Items]                    
Common Stock Voting Rights Votes per Share Number | Item           10        
Common Stock Outstanding [Member] | Common Class A [Member]                    
Class of Stock [Line Items]                    
Treasury Stock, Shares, Acquired (in shares) | shares   90,507 85,398 126,448 131,460 175,905 257,908      
Treasury Stock, Value, Acquired, Cost Method           $ 18,500 $ 30,100      
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares           $ 104.98 $ 116.7      
Common Stock Outstanding [Member] | Common Class B [Member]                    
Class of Stock [Line Items]                    
Treasury Stock, Shares, Acquired (in shares) | shares   0