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Common Stock and Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 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 earnings per share:

Three Months
Ended September 30
 
Nine Months
Ended September 30
 
 
2020
 
2019
 
2020
 
2019
 
         
Weighted average common shares, basic
  
13,032,389
   
12,968,540
   
13,021,398
   
12,955,602
 
Effect of dilutive securities:
                
Employee stock-based compensation
  
1,164
   
2,131
   
565
   
1,506
 
Weighted average common shares, diluted
  
13,033,553
   
12,970,671
   
13,021,963
   
12,957,108