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Net Income (Loss) Per Share | 12 Months Ended
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Dec. 31, 2022
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,
| 2022 |  | 2021 |  | 2020
Numerator: |  |  |  |  |
Loss from continuing operations | $ | (26,098) |  |  | $ | (14,425) |  |  | $ | (139,490) |
Adjustment for preferred stock cumulative dividends and deemed dividends | (10,894) |  |  | (21,478) |  |  | (12,373) |
Numerator for basic and diluted net loss from continuing operations per common share | (36,992) |  |  | (35,903) |  |  | (151,863) |
Income from discontinued operations, net of tax | — |  |  | 1,200 |  |  | 38,898 |
Numerator for basic and diluted net loss per common share | $ | (36,992) |  |  | $ | (34,703) |  |  | $ | (112,965) |
Denominator: |  |  |  |  |
Weighted average common shares outstanding | 43,738 |  |  | 42,991 |  |  | 42,692 |
Adjustment for participating securities | (951) |  |  | (461) |  |  | (493) |
Adjustment for 2021 Warrants outstanding (1) | 1,893 |  |  | 1,481 |  |  | — |
Shares used to calculate basic and diluted net loss per share | 44,680 |  |  | 44,011 |  |  | 42,199 |
Per common share net income (loss): |  |  |  |  |
Basic and diluted net loss from continuing operations per common share | $ | (0.83) |  |  | $ | (0.82) |  |  | $ | (3.60) |
Basic and diluted net income from discontinued operations per common share | — |  |  | 0.03 |  |  | 0.92 |
Basic and diluted net loss per common share | $ | (0.83) |  |  | $ | (0.79) |  |  | $ | (2.68) |
Cash dividends declared per common share | $ | — |  |  | $ | — |  |  | $ | — |
_______________________________ (1) Weighted average 2021 Warrants outstanding are included in shares outstanding for calculation of basic earnings per share because they are exercisable at an exercise price of $0.01 per share, subject to certain adjustments (see Note 19). 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,
| 2022 |  | 2021 |  | 2020
Options | 557 |  |  | 766 |  |  | 871 |
2019 Warrants | 1,500 |  |  | 1,500 |  |  | 1,500 |
Series B Preferred Stock, as-converted | — |  |  | — |  |  | 19,021 |
| 2,057 |  |  | 2,266 |  |  | 21,392 |
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, 2022. The 2019 Warrants excluded from the EPS calculations for the year ended December 31, 2022 had a per share exercise price of $11.49.

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