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Net Income (Loss) Per Share | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Net Income (Loss) Per Common Share The following table summarizes the computation of basic and diluted net income (loss) per common share.
| Years Ended December 31,
| 2023 |  | 2022 |  | 2021
Numerator: |  |  |  |  |
Loss from continuing operations | $ | (50,150) |  |  | $ | (26,098) |  |  | $ | (14,425) |
Adjustment for preferred stock cumulative dividends and deemed dividends | (13,098) |  |  | (10,894) |  |  | (21,478) |
Numerator for basic and diluted net loss from continuing operations per common share | (63,248) |  |  | (36,992) |  |  | (35,903) |
Income from discontinued operations, net of tax | — |  |  | — |  |  | 1,200 |
Numerator for basic and diluted net loss per common share | $ | (63,248) |  |  | $ | (36,992) |  |  | $ | (34,703) |
Denominator: |  |  |  |  |
Weighted average common shares outstanding | 46,174 |  |  | 43,738 |  |  | 42,991 |
Adjustment for participating securities | (2,636) |  |  | (951) |  |  | (461) |
Adjustment for warrants outstanding (1) | 3,200 |  |  | 1,893 |  |  | 1,481 |
Shares used to calculate basic and diluted net loss per share | 46,738 |  |  | 44,680 |  |  | 44,011 |
Basic and diluted net loss from continuing operations per common share | $ | (1.35) |  |  | $ | (0.83) |  |  | $ | (0.82) |
Basic and diluted net income from discontinued operations per common share | — |  |  | — |  |  | 0.03 |
Basic and diluted net loss per common share | $ | (1.35) |  |  | $ | (0.83) |  |  | $ | (0.79) |
Cash dividends declared per common share | $ | — |  |  | $ | — |  |  | $ | — |
_______________________________ (1) Outstanding warrants that are exercisable at an exercise price of $0.01 per share, are included in shares outstanding for calculation of basic earnings per share (see Note 18). The following table presents potentially dilutive securities that were excluded from the calculation of diluted net income (loss) per common share because they had an anti-dilutive effect.
| Years Ended December 31,
| 2023 |  | 2022 |  | 2021
Options | 381 |  |  | 557 |  |  | 766 |
2019 Warrants | 1,500 |  |  | 1,500 |  |  | 1,500 |
| 1,881 |  |  | 2,057 |  |  | 2,266 |
Stock options excluded from the EPS calculations had a per share exercise price ranging from $7.93 to $25.16 for the year ended December 31, 2023. The 2019 Warrants excluded from the EPS calculations for the year ended December 31, 2023 had a per share exercise price of $11.03.

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