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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2019
Summary of Significant Accounting Policies [Abstract]  
Antidilutive Securities
The common stock issuable upon the conversion or exercise of the following dilutive securities as of September 30, 2019 and as of September 30, 2018 have been excluded from the diluted net loss per share attributable to common stockholders calculation because their effect would have been antidilutive for the period presented:

 
 
As of September 30,
 
 
 
2019
  
2018
 
Stock options to purchase Common Stock
  
1,405,902
   
513,534
 
Convertible promissory note
  
-
   
9,216
 
Warrants to purchase Common Stock
  
262,758
   
115,860
 
Total
  
1,668,660
   
638,610
 
Calculation of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders
The following is a reconciliation of the numerator (net income or loss) and the denominator (number of shares) used in the calculation of basic and diluted net income (loss) per share attributable to common stockholders:

 
 
Three Months Ended September 30,
  
Nine Months Ended September 30,
 
 
 
2019
  
2018
  
2019
  
2018
 
Numerator
            
Basic and diluted net loss
 
$
(5,751,610
)
 
$
(711,208
)
 
$
(2,820,763
)
 
$
(2,016,932
)
                 
Denominator
                
Shares used in computing basic net loss per share
  
5,246,829
   
3,346,237
   
4,729,153
   
3,253,085
 
 
                
Net loss per share, basic and diluted
 
$
(1.10
)
 
$
(0.21
)
 
$
(0.60
)
 
$
(0.62
)