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Net Income (Loss) Per Share Applicable to Common Stockholders (Tables)
9 Months Ended
Sep. 30, 2019
Net income (loss) per share:  
Net Income (Loss) Per Shares Applicable To Common Stockholders

The following table sets forth the computation of basic and diluted net income (loss) per share:

  

   Three Months Ended
September 30,
  Nine Months Ended
September 30,
   2019  2018  2019  2018
Numerator:            
Net income (loss)  $94,298   $(45,257)  $225,927   $(408,528)
                     
Denominator:                    
Weighted average shares outstanding used in computing net income (loss) per share:                    
Basic   5,999,487    5,883,109    5,979,715    6,166,017 
Effect of dilutive stock options   317,783    —      256,958    —   
                     
Diluted   6,317,270    5,883,109    6,236,673    6,166,017 
                     
Net income (loss) per share applicable to common stockholders:                    
Basic  $0.02   $(0.01)  $0.04   $(0.07)
Diluted  $0.01   $(0.01)  $0.04   $(0.07)