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EQUITY INCENTIVE PLAN (Tables) | 9 Months Ended
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Sep. 30, 2023
EQUITY INCENTIVE PLAN [Abstract] |
Summary of stock option activity | The following table summarizes stock option activity under our plans during the nine months ended September 30, 2023:
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | Weighted-Average
​ | ​ | Options | ​ | Exercise Price
Outstanding at January 1, 2023 |  | 184,067 | ​ | $ | 56.75
Granted |  | 58,530 | ​ |  | 12.12
Forfeited |  | (8,384) | ​ |  | 24.12
Outstanding at September 30, 2023 |  | 234,213 | ​ | $ | 46.77
Exercisable at September 30, 2023 |  | 141,908 | ​ | $ | 57.93

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