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Note 14 - Shares Outstanding and Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the years ended December 31,
 
(in thousands, except per share data)
  
2018
    
2017
    
2016
  
                         
Weighted average basic shares outstanding
    
11,432
      
11,381
      
11,210
  
Assumed exercise of stock options and issuance of stock awards
    
8
      
-
      
-
  
Weighted average diluted shares outstanding
    
11,440
      
11,381
      
11,210
  
                         
Net income (loss)
   $
33,759
     $
18,963
     $
(1,078
 )
                         
Basic earnings (loss) per share
   $
2.95
     $
1.67
     $
(0.10
 )
Diluted earnings (loss) per share
   $
2.95
     $
1.67
     $
(0.10
 )
                         
Unvested RSUs
    
91
      
65
      
167