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Note 12 - Stock-Based Compensation (Details) - Stock Option Activity by Exercise Price (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 10.99 $ 11.38
Shares Under Outstanding Options 164,098 235,442
Weighted-Average Remaining Contractual Term 5 years 328 days  
Shares Under Exercisable Options 96,059  
Exercise Price 1 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 3.84  
Shares Under Outstanding Options 4,000  
Weighted-Average Remaining Contractual Term 73 days  
Shares Under Exercisable Options 4,000  
Exercise Price 2 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 10.44  
Shares Under Outstanding Options 25,000  
Weighted-Average Remaining Contractual Term 4 years 73 days  
Shares Under Exercisable Options 25,000  
Exercise Price 3 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 10.90  
Shares Under Outstanding Options 15,000  
Weighted-Average Remaining Contractual Term 3 years 146 days  
Shares Under Exercisable Options 15,000  
Exercise Price 4 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 10.90  
Shares Under Outstanding Options 67,000  
Weighted-Average Remaining Contractual Term 8 years 146 days  
Shares Under Exercisable Options 11,800  
Exercise Price 5 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 11.22  
Shares Under Outstanding Options 27,098  
Weighted-Average Remaining Contractual Term 6 years 328 days  
Shares Under Exercisable Options 14,259  
Exercise Price 6 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 11.54  
Shares Under Outstanding Options 8,000  
Weighted-Average Remaining Contractual Term 3 years 73 days  
Shares Under Exercisable Options 8,000  
Exercise Price 7 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 11.75  
Shares Under Outstanding Options 8,000  
Weighted-Average Remaining Contractual Term 2 years 73 days  
Shares Under Exercisable Options 8,000  
Exercise Price 8 [Member]
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise Price (in Dollars per share) $ 14.32  
Shares Under Outstanding Options 10,000  
Weighted-Average Remaining Contractual Term 1 year 73 days  
Shares Under Exercisable Options 10,000