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Note 16 - Stock Option and Purchase Plans (Tables)
12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
    Year ended December 31,  
   

2013

    2012  

Expected life (years)

    4.0       4.0  

Expected volatility

    81.1 %     100.3 %

Risk-free interest rates

    0.77 %     1.01 %

Expected dividend yield

    1.97       1.62  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
            Weighted  
            Average  
    Number of     Grant Date  
    Shares     Fair Value  

Nonvested shares at January 1, 2013

    1,066,560     $ 3.81  

Granted

    288,000       3.96  

Vested

    (318,845 )     3.37  

Forfeited

    (57,000 )     3.83  
                 

Nonvested shares at December 31, 2013

    978,715     $ 4.00  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
            Weighted-     Weighted-          
            average     average    

Aggregate

 
    Number of     Exercise Price    

Remaining

    Intrinsic  
    Shares    

Per Share

   

Term

    Value  

Outstanding at January 1, 2013

    1,053,111     $ 3.46                  

Granted

    281,500       3.93                  

Exercised

    (208,000 )     0.84                  

Forfeited

    (19,000 )     3.24                  

Expired

    (32,211 )     8.08                  

Outstanding at December 31, 2013

    1,075,400     $ 3.95       2.77     $ 122,000  

Exercisable at December 31, 2013

    295,400     $ 3.80       1.09     $ 110,000