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Net Loss Per Share | 9 Months Ended
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Sep. 30, 2021
Net Loss Per Share |
Net Loss Per Share | (12) Net Loss Per Share ​ Basic net loss per common share is based upon the weighted-average number of common shares outstanding during the period, excluding restricted stock that has been issued but is not yet vested. Diluted net loss per common share is based upon the weighted-average number of common shares outstanding during the period plus additional weighted-average potentially dilutive common shares outstanding during the period when the effect is dilutive. In periods in which the Company reports a net loss, there is no difference between basic and diluted net loss per share because dilutive shares of common stock are not assumed to have been issued as their effect is anti-dilutive. The potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive are as follows: ​
​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30,
​ |  | 2021 |  | 2020
Stock Options |  | 4,129,626 |  | 3,074,832
Restricted Stock |  | — |  | —
​ |  | 4,129,626 |  | 3,074,832
​

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