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LOSS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2023
LOSS PER SHARE |
Schedule of Potentially Dilutive Securities Outstanding Excluded from Diluted Loss Per Share Calculation | 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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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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