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Net Loss Per Share
6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Net Loss Per Share
3.
Net Loss Per Share
Basic net loss per share is calculated by dividing net loss by the weighted-average number of common stock outstanding during the period without consideration for common stock equivalents. Diluted net loss per share is computed by dividing net loss by the weighted-average number of common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of this calculation, stock options and warrants for common stock are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive.
The following shares of common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented because including them would have been antidilutive:
 
   
June 30,

2020
   
June 30,

2019
 
Series A warrants for common stock
   7,802,241    —   
Series B warrants for common stock
   2,574,727    —   
Options to purchase common stock
   2,351,055    331,469 
Warrants for common stock
   727,122    1,839 
  
 
 
   
 
 
 
Total potential dilutive shares
   13,455,145    333,308