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SHARE-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2024
SHARE-BASED COMPENSATION |
Schedule of restricted stock units activity | The following is a summary of restricted stock award activity for the year ended December 31, 2023 and the three months ended March 31, 2024 (number of units in thousands except per unit data):
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of Units | ​ | ​ | Weighted Average Grant Date Fair Value Per Unit
Nonvested, January 1, 2023 | ​ | 42 | ​ | $ | 6.93
Granted | ​ | 1 | ​ | $ | 23.26
Vested | ​ | (18) | ​ | $ | 14.98
Canceled | ​ | (17) | ​ | $ | 13.63
Nonvested, December 31, 2023 | ​ | 8 | ​ | $ | 17.09
​ | ​ | ​ | ​ | ​ | ​
Nonvested, January 1, 2024 | ​ | 8 | ​ | $ | 17.09
Granted | ​ | - | ​ | $ | -
Vested | ​ | - | ​ | $ | -
Canceled | ​ | - | ​ | $ | -
Nonvested, March 31, 2024 | ​ | 8 | ​ | $ | 17.09
Schedule of stock option activity | The following is a summary of option award activity for the year ended December 31, 2023 and the three months ended March 31, 2024 (number of units in thousands except per unit data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of Units |  | Weighted Average Exercise Price Per Unit |  | Weighted Average Grant Date Fair Value Per Unit |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value
Outstanding, January 1, 2023 | ​ | 1,025 | ​ | $ | 40.59 | ​ | $ | 4.99 | ​ | 9.44 | ​ | ​ | ​
Granted | ​ | 43 | ​ | $ | 22.94 | ​ | $ | 15.32 | ​ | 4.70 | ​ | ​ | ​
Exercised | ​ | (6) | ​ | $ | 16.01 | ​ | $ | 8.57 | ​ | — | ​ | ​ | ​
Forfeited | ​ | (56) | ​ | $ | 16.01 | ​ | $ | 8.57 | ​ | — | ​ | ​ | ​
Outstanding, December 31, 2023 | ​ | 1,006 | ​ | $ | 41.35 | ​ | $ | 5.22 | ​ | 8.28 | ​ | $ | ​
Exercisable, December 31, 2023 | ​ | 96 | ​ | $ | 42.18 | ​ | $ | 4.76 | ​ | 8.44 | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding, January 1, 2024 | ​ | 1,006 | ​ | $ | 41.35 | ​ | $ | 5.22 | ​ | 8.28 | ​ | ​ | ​
Granted | ​ | — | ​ | $ | — | ​ | $ | — | ​ | - | ​ | ​ | ​
Exercised | ​ | (6) | ​ | $ | 16.01 | ​ | $ | 8.57 | ​ | — | ​ | ​ | ​
Forfeited | ​ | — | ​ | $ | - | ​ | $ | - | ​ | — | ​ | ​ | ​
Outstanding, March 31, 2024 | ​ | 1,000 | ​ | $ | 41.51 | ​ | $ | 5.20 | ​ | 8.03 | ​ | $ | ​
Exercisable, March 31, 2024 | ​ | 90 | ​ | $ | 44.00 | ​ | $ | 4.49 | ​ | 8.44 | ​ | $ | —

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