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Note 14 - Stock Option Grants - Stock Option Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Stock Options Outstanding, Number of Shares, Beginning Balance (in shares) 175,550 83,400
Stock Options Outstanding, Average Exercise Price, Beginning Balance (in dollars per share) $ 8.17 $ 8.09
Stock Options Granted, Number of Shares (in shares) 97,000 96,150
Stock Options Granted, Average Exercise Price (in dollars per share) $ 8.30 $ 8.23
Stock Options Exercised, Number of Shares (in shares) 0 0
Stock Options Exercised, Average Exercise Price (in dollars per share) $ 0 $ 0
Stock Options Expired, Number of Shares (in shares) 0 0
Stock Options Expired, Average Exercise Price (in dollars per share) $ 0 $ 0
Stock Options Forfeited, Number of Shares (in shares) 0 4,000
Stock Options Forfeited, Average Exercise Price (in dollars per share) $ 0 $ 8.08
Stock Options Outstanding, Number of Shares, Ending (in shares) 272,550 175,550
Stock Options Outstanding, Average Exercise Price, Ending Balance (in dollars per share) $ 8.21 $ 8.17
Stock Options Exercisable, Number of Shares (in shares) 175,550 80,400
Stock Options Exercisable, Average Exercise Price (in dollars per share) $ 8.17 $ 8.09