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SHARE-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Share-Based Compensation Expense and Unrecognized Compensation Cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | As of | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​ | June 30, 2024 | ​
​ | ​ | June 30, | ​ | June 30, | ​ | Unrecognized | ​ | Weighted | ​
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 |  | Compensation Cost |  | Average Years | ​
RSUs | ​ | $ | 1.5 | ​ | $ | 2.2 | ​ | $ | 3.9 | ​ | $ | 7.0 | ​ | $ | 5.9 | ​ | 1.3 | ​
Options | ​ | ​ | 0.2 | ​ | ​ | 0.7 | ​ | ​ | 1.0 | ​ | ​ | 3.3 | ​ | ​ | 0.8 | ​ | 1.0 | ​
PSUs | ​ | ​ | 0.7 | ​ | ​ | 0.9 | ​ | ​ | 1.3 | ​ | ​ | 1.7 | ​ | ​ | 4.1 | ​ | 1.8 | ​
Restricted Cash Units ("RCUs") | ​ | ​ | 0.2 | ​ | ​ | — | ​ | ​ | 2.2 | ​ | ​ | — | ​ | ​ | 2.4 (1) | ​ | 1.7 | ​
Total share-based compensation expense | ​ | $ | 2.6 | ​ | $ | 3.8 | ​ | $ | 8.4 | ​ | $ | 12.0 | ​ | ​ | ​ | ​ | ​ | ​
(1) | Unrecognized Compensation Cost related to RCU awards as of June 30, 2024 is calculated using the stock price as of June 30, 2024.
Summary of Awards Granted and Weighted Average Grant-Date Fair Value | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended | ​
​ | ​ | June 30, 2024 | ​
​ | ​ | Awards Granted | ​ | Weighted Average Grant Date Fair Value per Award | ​
RSUs | ​ | ​ | 1,057,062 | ​ | $ | 3.64 | ​
Options | ​ | ​ | 319,407 | ​ | ​ | 2.48 | ​
PSUs | ​ | ​ | 575,475 | ​ | ​ | 2.81 | ​
RCUs | ​ | ​ | 1,074,119 | ​ | ​ | 4.85 | ​
Employee Stock Option |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Weighted-average Assumptions | ​
​ | ​ | ​ | ​
​ | ​ | Six Months Ended | ​
​ |  | June 30, 2024 | ​
Expected term (in years) |  | 5.50 | ​
Expected volatility |  | 64.12 | %
Risk-free interest rate |  | 4.28 | %
Dividend yield | ​ | 0.73 | %
Performance Share Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Weighted-average Assumptions | ​
​ | ​ | ​ | ​
​ | ​ | Six Months Ended | ​
​ | ​ | June 30, 2024 | ​
Expected term (in years) | ​ | 3.00 | ​
Expected volatility |  | 65.40 | %
Risk-free interest rate |  | 4.40 | %
Share price | $ | 4.37 | ​

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