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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Effect of Dilutive Shares The effect of the dilutive shares for the years 2019, 2018 and 2017 is illustrated in the following table.
 
  
2019
 
  
2018
 
  
2017
 
Basic weighted average shares outstanding
  
 
5,063,736
 
  
 
4,889,420
 
  
 
4,878,691
 
Dilutive effect of stock options
  
 
2,367
 
  
 
9,798
 
  
 
17,157
 
  
 
 
 
  
 
 
 
  
 
 
 
Dilutive weighted average shares outstanding
  
 
5,066,103
 
  
 
4,899,218
 
  
 
4,895,848
 
  
 
 
 
  
 
 
 
  
 
 
 
Net income
  
$
5,902
 
  
$
6,673
 
  
$
3,704
 
  
 
 
 
  
 
 
 
  
 
 
 
Net income per share-basic
  
$
1.17
 
  
$
1.36
 
  
$
0.76
 
Net income per share-diluted
  
$
1.17
 
  
$
1.36
 
  
$
0.76