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Note 10 - Equity Incentive Plan (Details) - Stock Options and SAR’s Activity (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Stock Options and SAR’s Activity [Abstract]    
Options and SAR's outstanding at beginning of year 1,793,685 2,108,003
Options and SAR's outstanding at beginning of year (in Dollars per share) $ 8.30 $ 7.26
Options and SAR's outstanding at end of year 1,513,326 1,793,685
Options and SAR's outstanding at end of year (in Dollars per share) $ 9.14 $ 8.30
Granted 413,500 204,000
Granted (in Dollars per share) $ 12.55 $ 12.06
Cancelled (243,724) (212,749)
Cancelled (in Dollars per share) $ 8.77 $ 6.58
Expired (9,928) (7,714)
Expired (in Dollars per share) $ 9.62 $ 1.68
Exercised (440,207) (297,855)
Exercised (in Dollars per share) $ 8.71 $ 4.74