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Note 15 - Common Stock (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2024
USD ($)
Apr. 30, 2024
USD ($)
Jan. 31, 2023
USD ($)
Jul. 31, 2024
USD ($)
$ / shares
shares
Jul. 31, 2023
USD ($)
$ / shares
shares
Sep. 01, 2022
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%  
Treasury Stock, Value, Acquired, Cost Method $ 11,392 $ 15,147 $ 4,800          
Minimum [Member]                
Class of Stock [Line Items]                
Shareholder Ownership Percentage             5.00%  
Common Class A [Member]                
Class of Stock [Line Items]                
Treasury Stock, Shares, Acquired (in shares) | shares       188,800 118,478      
Common Stock Voting Rights Votes per Share Number       1        
Shareholder Ownership Percentage               4.90%
Number of Rights               1
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%  
Stock Repurchase Program, Authorized Amount           $ 50,000    
Treasury Stock, Value, Acquired, Cost Method       $ 26,500 $ 4,800      
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares       $ 140.31 $ 40.51      
Stock Repurchase Program, Remaining Amount of Shares Authorized to be Repurchased $ 6,500     $ 6,500        
Common Class B [Member]                
Class of Stock [Line Items]                
Common Stock Voting Rights Votes per Share Number       10