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Note 12 - Stock-Based Compensation (Details) - Employee Stock Option Activity (USD $)
 12 Months Ended
Dec. 31, 2013
Employee Stock Option Activity [Abstract]  
Shares Under Option 235,442
Shares Under Option, Weighted-Average Exercise Price $ 11.38
Weighted-Average Remaining Contractual Term 5 years 328 days
Aggregate Intrinsic Value $ 1,596,390 [1]
Fully vested and exercisable at December 31, 2013 96,059
Fully vested and exercisable at December 31, 2013 $ 11.01
Fully vested and exercisable at December 31, 2013 4 years 109 days
Fully vested and exercisable at December 31, 2013 $ 932,357 [1]
Granted 35,000
Granted $ 10.44
Exercised (7,257)
Exercised $ 10.94
Canceled/forfeited/expired (99,087)
Canceled/forfeited/expired $ 11.71
Shares Under Option 164,098
Shares Under Option, Weighted-Average Exercise Price $ 10.99
[1] The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option. The per share market value of our common stock, as determined by the closing price on December 31, 2013, was $20.72.