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Net Loss per Common Share (Tables)
9 Months Ended
Sep. 30, 2020
Net Loss per Share [Abstract]  
Schedule of Company's Potential Anti-dilutive Securities

 

 

 

 

 

 

 

September 30, 

 

September 30, 

 

    

2019

    

2020

Stock options

 

113,301

 

154,594

6% convertible exchangeable preferred stock

 

85

 

85

Series A preferred stock

 

6,600

 

6,600

Common stock warrants

 

374,525

 

4,370,525

Total shares excluded from calculation

 

494,511

 

4,531,804