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Note 15 - Shareholders' Equity (Details Textual)
 1 Months Ended 12 Months Ended
Oct. 28, 2011
$ / shares
shares
Dec. 31, 2012
$ / shares
Jan. 31, 2012
$ / shares
Oct. 31, 2010
$ / shares
Oct. 31, 2017
USD ($)
$ / shares
shares
Oct. 31, 2016
USD ($)
$ / shares
shares
Oct. 31, 2015
USD ($)
$ / shares
Jul. 14, 2015
shares
Common Stock, Shares, Outstanding         7,315,605 7,081,159    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased               400,000
Purchase And Retire Percentage Of Shares In Common Stock Outstanding               6.00%
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased         398,400      
Stock Repurchased and Retired During Period, Shares         5,701      
Stock Repurchased and Retired During Period, Value | $         $ 18,122 $ 40,150 $ 379,675  
Common Stock Dividends, Rights Per Share 1              
Minimum Percentage of Stock Owner in Stockholder Protection Rights Agreement 15.00%              
Preferred Stock, Redemption Price Per Share | $ / shares $ 0.0001              
Preferred Stock Dividends, Rights Per Share, No Par Value | $ / shares 0              
Preferred Stock, Exercise Price | $ / shares $ 25              
Preferred Stock, Number of Votes 1,000              
Preferred Stock, Dividend Rate, Percentage 1000.00%              
Preferred Stock, Capital Shares Reserved for Future Issuance         100,000      
Common Stock, Dividends, Per Share, Declared | $ / shares   $ 0.02 $ 0.015 $ 0.01 $ 0 $ 0 $ 0.08  
Common Stock, Shares, Issued         7,315,605 7,081,159    
Minimum [Member]                
Stock Repurchase Program, Period in Force         2 years      
Maximum [Member]                
Stock Repurchase Program, Period in Force         3 years