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Note 12 - Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
(In thousands, except per share amounts)
  
2018
    
2017
  
Numerator
  
 
 
 
  
 
 
 
Net income (loss)
   $
25,074
     $
(15,417
 )
Denominator
  
 
 
 
  
 
 
 
Weighted average shares used to compute basic EPS
    
40,039
      
37,578
  
Dilutive effect of share-based awards
(a)
    
224
      
-
  
Weighted average shares used to compute diluted EPS
    
40,263
      
37,578
  
                 
Earnings (loss) per share
  
 
 
 
  
 
 
 
Basic
   $
0.63
     $
(0.41
 )
Diluted
   $
0.62
     $
(0.41
 )