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4. Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] The following table shows the weighted average number of shares used in computing earnings (loss) per share and the effect on weighted average number of shares of potential dilutive common stock.

   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2014
   
2013
   
2014
   
2013
 
                         
Net income (loss)
 
$
117,774
   
$
486,975
   
$
(263,937)
   
$
464,007
 
Shares used in calculation of income per share:
                               
     Basic
   
5,066, 009
     
5,066,009
     
5,066,009
     
5,061,710
 
          Effect of dilutive options
   
21,822
     
1,188
     
25,715
     
1,252
 
          Effect of dilutive restricted shares
   
36,000
     
56,250
     
36,000
     
56,250
 
     Diluted
   
5,123,831
     
5,123,447
     
5,127,724
     
5,119,212
 
Net income (loss) per share:
                               
     Basic
 
$
0.02
   
$
0.10
   
$
(0.05)
   
$
0.09
 
     Diluted
 
$
0.02
   
$
0.10
   
$
(0.05)
   
$
0.09