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Net Loss Per Share (Tables)
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Computation of Diluted Weighted-Average Shares Outstanding Anti-Dilutive
The following potentially dilutive securities outstanding prior to the use of the treasury stock method have been excluded from the computation of diluted weighted-average shares outstanding, as they would be anti-dilutive.
 
   
As of September 30,
 
   
2019
   
2018
 
Options to purchase common stock
   1,088,676    1,041,407 
Warrants to purchase common stock
   18,653,195    5,258,444