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Loss per Common Share (Tables)
6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Schedule of Potential Common Shares Issuable Pursuant to Outstanding Securities Excluded from Computation of Diluted Loss per Common Share

The following table represents the potential common shares issuable pursuant to outstanding securities as of the related period end dates that were excluded from the computation of diluted loss per common share because their inclusion would have had an anti-dilutive effect (in thousands):

 

 

Three and six months ended

June 30,

 

 

2020

 

 

2019

 

Warrants to purchase shares of common stock

 

208

 

 

 

218

 

Convertible preferred stock

 

19,714

 

 

 

11,381

 

Options to purchase shares of common stock

 

7,906

 

 

 

4,952

 

Outstanding securities not included in

   calculations

 

27,828

 

 

 

16,551