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Common Stock and Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2021
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
 
   
2021
   
2020
   
2021
   
2020
 
                         
Weighted average common shares, basic
   
13,083,762
     
13,032,389
     
13,069,582
     
13,021,398
 
Effect of dilutive securities:
                               
Employee stock-based compensation
   
563
     
1,164
     
347
     
565
 
Weighted average common shares, diluted
   
13,084,325
     
13,033,553
     
13,069,929
     
13,021,963