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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2025
STOCK-BASED COMPENSATION |
Summary of stock options outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2025 | ​ | June 30, 2024
​ |  | ​ |  | Weighted |  | ​ |  | Weighted
​ | ​ | Number of | ​ | Average | ​ | Number of | ​ | Average
​ | ​ | Stock | ​ | Exercise | ​ | Stock | ​ | Exercise
​ | ​ | Options | ​ | Price | ​ | Options | ​ | Price
Stock options outstanding at beginning of period |  | 649,345 | ​ | $ | 1.91 |  | 424,826 | ​ | $ | 2.66
Granted |  | 16,390 | ​ |  | 0.48 |  | 224,519 | ​ | ​ | 0.49
Stock options outstanding at end of period |  | 665,735 | ​ | ​ | 1.88 |  | 649,345 | ​ | ​ | 1.91
Stock options exercisable at end of period |  | 665,735 | ​ | $ | 1.88 |  | 424,826 | ​ | $ | 2.66
Summary of restricted stock units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | June 30,
​ | ​ | 2025 | ​ | 2024
​ |  | ​ |  | Weighted- |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant Date | ​ | Number of | ​ | Grant Date
​ | ​ | RSUs | ​ | Fair Value | ​ | RSUs | ​ | Fair Value
Unvested RSUs at beginning of period |  | 4,090,639 | ​ | $ | 0.60 |  | 1,773,058 | ​ | $ | 1.03
Granted |  | 20,101,991 | ​ | ​ | 0.48 |  | 3,235,731 | ​ |  | 0.49
Forfeited/Expired |  | (142,139) | ​ |  | 0.92 |  | (6,784) | ​ |  | 3.93
Vested |  | (1,826,582) | ​ |  | 0.51 |  | (884,817) | ​ |  | 1.03
Unvested RSUs at end of period |  | 22,223,909 | ​ | $ | 0.49 |  | 4,117,188 | ​ | $ | 0.60

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