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Note 3 - Net Income (Loss) per Share (Tables)
9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
September 30,
   
Nine Months Ended
September 30,
 
(In thousands, except per share data)
 
2013
   
2012
   
2013
   
2012
 
Basic net income (loss) per share:
                       
Net income (loss)
  $ 1,291     $ (5,949 )   $ 4,266     $ (8,696 )
                                 
Weighted average class A and B common shares outstanding
    41,863       41,678       41,644       41,697  
                                 
Basic net income (loss) per share
  $ 0.03     $ (0.14 )   $ 0.10     $ (0.21 )
                                 
Diluted net income (loss) per share:
                               
Net income (loss)
  $ 1,291     $ (5,949 )   $ 4,266     $ (8,696 )
                                 
Weighted average class A and B common shares outstanding for diluted net income per share
    41,863       41,678       41,644       41,697  
                                 
Assumed exercise of stock options under the treasury stock method
    924       -       1,018       -  
      42,787       41,678       42,662       41,697  
                                 
Diluted net income (loss) per share
  $ 0.03     $ (0.14 )   $ 0.10     $ (0.21 )
                                 
Schedule of Potentially Dilutive Securities [Table Text Block]
   
September 30,
 
(In thousands)
 
2013
   
2012
 
Employee stock options
    2,374       -  
Non-employee stock options
    410       -  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
(In thousands)
 
2013
   
2012
 
Employee stock options
    576       3,578  
Non-employee stock options
    -       450