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Common Stock and Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Common Stock and Earnings Per Share [Abstract]  
Shares Used in Computing Basic and Diluted Earnings per Share
The following table summarizes the shares used in computing basic and diluted net income per share:

 
2020
  
2019
 
Weighted average common shares, basic
  
13,033,681
   
12,964,080
 
Effect of dilutive securities:
        
Employee stock-based compensation
  
839
   
2,212
 
Weighted average common shares, diluted
  
13,034,520
   
12,966,292