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Stockholders' Equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Stockholders' Equity |
Schedule of restricted Stock Units activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Exercise
​ |  | RSUs |  | Price
RSUs non-vested January 1, 2024 |  | 106,019 | ​ | $ | 2.12
Granted |  | — | ​ |  | —
Vested |  | — | ​ |  | —
Forfeited |  | — | ​ |  | —
RSUs non-vested March 31, 2024 |  | 106,019 | ​ | $ | 2.12
​ | ​ | ​ | ​ | ​ | ​
Vested RSUs undelivered March 31, 2024 |  | 135,745 | ​ | $ | 2.22
Summary of the option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | ​ |  |  | Weighted |  | ​ |
​ | ​ | ​ |  | Weighted |  | Average | ​ | ​ | ​
​ | ​ | ​ |  | Average |  | Remaining |  | Aggregate
​ |  | Number of |  | Exercise |  | Life |  | Intrinsic
​ |  | Options |  | Price |  | In Years |  | Value
Outstanding, January 1, 2024 |  | 5,306,377 | ​ | $ | 3.31 |  |  |  | ​ |
Granted |  | 863,000 | ​ |  | 1.88 |  |  |  | ​ |
Exercised |  | — | ​ |  | — |  |  |  | ​ |
Forfeited |  | (146,500) | ​ | ​ | 1.27 |  | ​ | ​ | ​ | ​
Outstanding, March 31, 2024 | ​ | 6,022,877 | ​ | $ | 3.19 | ​ | 6.9 | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable, March 31, 2024 |  | 4,147,529 | ​ | $ | 3.63 |  | 5.8 | ​ | $ | —
Schedule of information related to stock options | The following table presents information related to stock options as of March 31, 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options Outstanding |  | Options Exercisable
​ | ​ | ​ | ​ |  | Weighted | ​ | ​
​ | ​ |  | Outstanding |  | Average |  | Exercisable
Exercise |  | Number of |  | Remaining Life |  | Number of
Price |  | Options |  | In Years |  | Options
​ | $1.00 - $1.99 |  | 2,299,482 | ​ | 4.5 |  | 1,049,492
​ | $2.00 - $2.99 |  | 1,446,663 | ​ | 6.6 |  | 995,502
​ | $3.00 - $3.99 |  | 898,528 | ​ | 6.3 |  | 781,568
​ | $4.00 - $4.99 |  | 333,000 | ​ | 7.4 |  | 275,930
​ | $5.00 - $5.99 |  | 50,805 | ​ | 3.5 |  | 50,638
​ | $6.00 - $6.99 |  | 843,759 | ​ | 5.9 |  | 843,759
​ | $7.00+ |  | 150,640 | ​ | 4.0 |  | 150,640
​ | ​ | ​ | 6,022,877 | ​ | 5.8 | ​ | 4,147,529
Schedule of Black-Scholes option pricing model to stock options granted | ​
​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended
​ | ​ | March 31,
​ |  | 2024 |  | 2023
Expected term (years) | ​ | 5.85 - 10.00 |  | 5.85 - 10.00
Risk free interest rate | ​ | 4.04% - 4.24% | ​ | 3.60% - 4.18%
Expected volatility | ​ | 80% - 82% | ​ | 82% - 83%
Expected dividends | ​ | 0.00% | ​ | 0.00%

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