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Net Loss per Common Share | 9 Months Ended
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Sep. 30, 2022
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, 2021 and 2022, as the result would be anti-dilutive:
​ | ​ | ​ | ​ | ​
​ |  | September 30, | ​ | September 30,
​ |  | 2022 |  | 2021
Stock options |  | 1,618,089 |  | 720,788
Restricted Stock Units |  | 137,657 |  | —
6% convertible exchangeable preferred stock |  | 85 |  | 85
Series A preferred stock |  | 6,600 |  | 6,600
Series B preferred stock |  | 1,188,725 |  | 1,188,725
Common stock warrants |  | 3,234,379 |  | 3,234,379
Total shares excluded from calculation |  | 6,185,535 |  | 5,150,577
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