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Note 13 - Earnings Per Share (Details Textual) - Stock Compensation Plan [Member] - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 108,400 34,440
Antidilutive Securities Excluded from Computation of Earnings Per Share, Weight Average Exercise Price $ 17.98 $ 10.03