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Note 2 - Common Stock Outstanding and Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended
    
For the Nine Months Ended
  
(Amounts in thousands, except per share information)
  
September 30,
    
September 30,
  
Earnings Per Share
  
2017
    
2016
    
2017
    
2016
  
Numerators:
                                
Net income
   $
2,876
     $
2,366
     $
7,337
     $
2,962
  
Denominators:
                                
Weighted average number of common shares outstanding - basic
    
16,191
      
13,369
      
14,884
      
13,366
  
Effect of potentially dilutive common shares
(1)
    
97
      
70
      
100
      
46
  
Weighted average number of common shares outstanding - diluted
    
16,288
      
13,439
      
14,984
      
13,412
  
Earnings per common share:
                                
Basic
   $
0.18
     $
0.18
     $
0.49
     $
0.22
  
Diluted
   $
0.18
     $
0.18
     $
0.49
     $
0.22
  
Anti-dilutive options not included in diluted earnings per 
share calculation
    
70
      
74
      
74
      
111
  
Anti-dilutive restricted shares not included in diluted earnings 
per share calculation
    
42
      
—
      
43
      
41