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Net Loss per Common Share
 9 Months Ended
Sep. 30, 2021
Net Loss per Common Share  
Net Loss per Common Share

4.           Net Loss per Common Share

The Company calculates net loss per common share in accordance with ASC 260 “Earnings Per Share” (“ASC 260”). Basic and diluted net loss per common share was determined by dividing net loss applicable to common stockholders by the weighted average number of shares of common stock outstanding during the period.

The following potentially dilutive securities have not been included in the computation of diluted net loss per share for the three months ended September 30, 2020 and 2021, as the result would be anti-dilutive:

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September 30, 

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September 30, 

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2020

    

2021

Stock options

 

154,594

 

720,788

6% convertible exchangeable preferred stock

 

85

 

85

Series A preferred stock

 

6,600

 

6,600

Series B preferred stock

 

—

 

1,188,725

Common stock warrants

 

4,370,525

 

3,234,379

Total shares excluded from calculation

 

4,531,804

 

5,150,577

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