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Note 2 - Common Stock Outstanding and Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended
  
(Amounts in thousands, except per share information)
  
March 31,
  
Earnings Per Share
  
2018
    
2017
  
Numerators:
                
Net income
   $
3,241
     $
2,252
  
Denominators:
                
Weighted average number of common shares outstanding - basic
(1)
    
16,225
      
13,416
  
Effect of potentially dilutive common shares
(2)
    
85
      
105
  
Weighted average number of common shares outstanding - diluted
    
16,310
      
13,521
  
Earnings per common share:
                
Basic
   $
0.20
     $
0.17
  
Diluted
   $
0.20
     $
0.17
  
Anti-dilutive options not included in diluted earnings per share calculation
    
—
      
—
  
Anti-dilutive restricted shares not included in diluted earnings per share calculation
    
41,915
      
33,068