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Computation of Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Computation of Earnings Per Share [Abstract]  
Basic and diluted earnings per share
Basic and diluted earnings per share are calculated as follows:

  
For the Three Months Ended March 31,
 
  
2018
  
2017
 
Net income
 
$
317,300
  
$
641,500
 
Weighted average shares outstanding for the period
  
1,416,699
   
1,550,032
 
Basic earnings per share
 
$
0.22
  
$
0.41
 
Diluted earnings per share
 
$
0.22
  
$
0.41