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Note 14 - Common Stock (Details Textual)
shares in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2018
shares
Apr. 30, 2018
shares
Dec. 05, 2008
Aug. 15, 2008
Aug. 04, 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           4,000
Stock Repurchased During Period, Shares 0 0        
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 500 500        
Common Class B [Member]            
Common Stock Voting Rights Votes per Share Number   10