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Note 14 - Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Year Ended December 31,
  
   
201
9
    
201
8
    
201
7
  
   
(in thousands, except per share data)
  
                         
Net income
   $
7,900
     $
23,994
     $
38,899
  
                         
Basic weighted average common shares outstanding
    
5,832
      
6,083
      
6,331
  
Dilutive effect of common stock equivalents
    
48
      
76
      
67
  
                         
Diluted weighted average common shares outstanding
    
5,880
      
6,159
      
6,398
  
                         
Basic earnings per share
   $
1.35
     $
3.94
     $
6.14
  
                         
Diluted earnings per share
   $
1.34
     $
3.90
     $
6.08