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Note 15 - Shareholders' Equity (Details Textual) | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2012 $ / shares | Jan. 31, 2012 $ / shares | Oct. 31, 2010 $ / shares | Oct. 31, 2016 $ / shares shares | Jul. 31, 2016 $ / shares | Apr. 30, 2016 $ / shares | Jan. 31, 2016 $ / shares | Oct. 31, 2015 $ / shares shares | Jul. 31, 2015 $ / shares | Apr. 30, 2015 $ / shares | Jan. 31, 2015 $ / shares | Oct. 31, 2016 USD ($) $ / shares shares | Oct. 31, 2015 USD ($) $ / shares shares | Oct. 31, 2014 USD ($) $ / shares | Jul. 14, 2015 shares
Common Stock, Shares, Outstanding |  |  |  | 7,081,159 |  |  |  | 7,059,548 |  |  |  | 7,081,159 | 7,059,548 |  |
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 |  |  |  |  |  |  |  | 398,400 |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  |  |  |  |  |  |  | 14,225 |  |  |
Stock Repurchased and Retired During Period, Value | $ |  |  |  |  |  |  |  |  |  |  |  | $ (40,150) | $ (379,675) | $ (195,206) |
Common Stock Dividends, Rights Per Share |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Minimum Percentage of Stock Owner in Stockholder Protection Rights Agreement |  |  |  | 15.00% |  |  |  |  |  |  |  | 15.00% |  |  |
Preferred Stock, Exercise Price | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 25 |  |  |
Preferred Stock, Number of Votes |  |  |  |  |  |  |  |  |  |  |  | 1,000 |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  |  |  |  |  |  | 1000.00% |  |  |
Preferred Stock, Redemption Price Per Share | $ / shares |  |  |  | $ 0.0001 |  |  |  |  |  |  |  | $ 0.0001 |  |  |
Preferred Stock, Capital Shares Reserved for Future Issuance |  |  |  | 100,000 |  |  |  |  |  |  |  | 100,000 |  |  |
Common Stock, Dividends, Per Share, Declared | $ / shares | $ 0.02 | $ 0.015 | $ 0.01 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0 | $ 0.08 | $ 0.08 |
Preferred Stock Dividends, Rights Per Share, No Par Value | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Period in Force |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Period in Force |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |

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