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Earnings Per Share of Common Stock (Tables)
9 Months Ended
Sep. 30, 2018
Basic and diluted net income per common share outstanding:  
Schedule of Weighted Average Number of Common Shares

The denominator is based on the following weighted average number of common shares:

 

    Three Months
Ended September 30,
  Nine Months
Ended September 30,
 
    2018     2017     2018     2017  
Basic     9,266,962       8,106,499       8,499,967       8,120,091  
Incremental shares for assumed exercise of options     7,860       10,652       7,757       11,309  
Diluted     9,274,822       8,117,151       8,507,724       8,131,400