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Note 9 - Earnings (Loss) Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
  
   
March 31
  
 
  
2018
    
2017
  
Numerator:                
Net income (loss) (in thousands)
   $
204
     $
(1,478
 )
Denominator:
                
Weighted average common shares outstanding:
                
Basic
    
22,799,221
      
22,680,562
  
Dilutive effect of non-vested awards
    
57,900
      
-
  
Diluted
    
22,857,121
      
22,680,562
  
Net income (loss) per share:
                
Basic
   $
0.01
     $
(0.07
 )
Diluted
   $
0.01
     $
(0.07
 )