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LOSS PER SHARE | 12 Months Ended
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Dec. 31, 2023
LOSS PER SHARE |
LOSS PER SHARE | 14. LOSS PER SHARE The Company’s basic loss per common share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. The Company’s restricted stock awards (non-vested shares) are issued and outstanding at the time of grant but are excluded from the Company’s computation of weighted-average shares outstanding in the determination of basic loss per share until vesting occurs. A net loss cannot be diluted, so when the Company is in a net loss position, basic and diluted loss per common share are the same. If in the future the Company achieves profitability, the denominator of a diluted earnings per common share calculation will include both the weighted-average number of shares outstanding and the number of common stock equivalents, if the inclusion of such common stock equivalents would be dilutive. Dilutive common stock equivalents potentially include warrants, stock options, non-vested restricted stock awards and non-vested performance restricted stock units using the treasury stock method, along with the effect, if any, from the potential conversion of outstanding securities, such as convertible preferred stock. The following potentially dilutive securities outstanding as of December 31, 2023, 2022 and 2021 have been excluded from the denominator of the diluted loss per share of common stock outstanding calculation (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ | 2023 |  | 2022 |  | 2021
Stock options | ​ | 1,270 | ​ | 1,301 | ​ | 1,499
Non-vested PRSUs | ​ | 395 |  | 395 |  | 395
Non-vested restricted stock units | ​ | 2,965 |  | 3,506 |  | 1,729
Common stock warrants | ​ | 41 |  | 61 |  | 75
​

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