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Note 14 - Common Stock (Details Textual)
shares in Thousands
3 Months Ended
Jan. 31, 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%        
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        
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 500        
Common Class B [Member]          
Common Stock Voting Rights Votes per Share Number 10