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Note 5 - Net Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
September 30,
    
Nine Months Ended
September 30,
  
   
2019
    
2018
    
2019
    
2018
  
In thousands (except per share amounts):
                                
Net income
   $
49
     $
405
     $
179
     $
1,469
  
Weighted average outstanding shares of common stock
    
1,922
      
2,048
      
1,967
      
2,048
  
Dilutive potential common shares from employee stock options
    
-
      
17
      
-
      
40
  
Common stock and common stock equivalents
    
1,922
      
2,065
      
1,967
      
2,088
  
Income per share:
                                
Basic net income per share
   $
0.03
 
   $
0.20
     $
0.09
     $
0.72
  
Diluted net income per share
   $
0.03
 
   $
0.20
     $
0.09
     $
0.70