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Note 16 - Stock Option and Purchase Plans (Tables)
12 Months Ended
Dec. 31, 2014
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,   
      2014        2013   

Expected life (years)

    4.0       4.0  

Expected volatility

    53.3

%

    81.1

%

Risk-free interest rates

    1.73

%

    0.77

%

Expected dividend yield

    2.67       1.97  
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, 2014

    978,715     $ 4.00  

Granted

    283,000       2.80  

Vested

    (274,814 )     4.16  

Forfeited

    (98,000 )     3.72  

Nonvested shares at December 31, 2014

    888,901     $ 3.60  
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, 2014

    1,075,400     $ 3.95                  

Granted

    294,000       2.80                  

Exercised

    (201,589 )     2.56                  

Forfeited

    (37,500 )     3.52                  

Expired

    (74,311 )     6.74                  

Outstanding at December 31, 2014

    1,056,000     $ 3.72       2.85     $ 15,000  

Exercisable at December 31, 2014

    233,000     $ 4.16       1.20     $ 14,800