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EARNINGS PER SHARE
12 Months Ended
Dec. 31, 2014
EARNINGS PER SHARE [Abstract]  
EARNINGS PER SHARE
4. EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period increased to include all additional common shares that would have been outstanding assuming potentially dilutive common shares, resulting from option exercises, had been issued and any proceeds thereof used to repurchase common stock at the average market price during the period.

  
2014
  
2013
  
2012
 
       
Net income for diluted computation
 
$
4,645,960
  
$
5,285,847
  
$
2,981,075
 
             
Weighted average shares:
            
Basic
  
6,477,457
   
6,345,615
   
6,351,245
 
Effect of dilutive securities:
            
 
Stock options
  
602,113
   
576,659
   
630,282
 
             
Diluted
  
7,079,570
   
6,922,274
   
6,981,527
 
             
Net income per share:
            
Basic
 
$
0.72
  
$
0.83
  
$
0.47
 
Diluted
 
$
0.66
  
$
0.76
  
$
0.43
 
 
We exclude from earnings per share the weighted-average number of securities whose effect is anti-dilutive. Excluded from the calculation of earnings per share for the years ended December 31, 2014, 2013 and 2012 were 20,000, 272,500, and 272,500 of options to purchase shares of common stock, respectively, because their effect is anti-dilutive.