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Note 15 - Common Stock (Details Textual)
shares in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2021
shares
Apr. 30, 2021
shares
Jan. 11, 2018
Aug. 15, 2008
Jul. 03, 2001
shares
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%    
Minimum [Member]          
Shareholder Ownership Percentage     5.00%    
Common Class A [Member]          
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, Number of Shares Authorized to be Repurchased (in shares)         200
Stock Repurchased During Period, Shares (in shares) 0 0      
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares) 22 22      
Common Class B [Member]          
Common Stock Voting Rights Votes per Share Number   10