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Share-based Compensation | 6 Months Ended
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Jun. 30, 2025
Share-based Compensation |
Share-based compensation | Note 7 — Share-based Compensation ​ Restricted share awards are issued to employees and to members of our board of directors that are subject to specified restrictions and a risk of forfeiture. The restrictions typically lapse over one to four years and may entitle holders to dividends and voting rights. Other types of share-based compensation include performance share awards, performance share units, and restricted share units (collectively with restricted share awards, “restricted shares”), as well as options to purchase common stock. ​ Share-based compensation expense was recognized in the following line items in the Consolidated Statements of Operations for the three and six months ended June 30, 2025 and 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended June 30, | ​ | Six months ended June 30, | ​
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
​ | ​ | (in thousands) | ​
Cost of sales |  | $ | 1,991 |  | $ | 1,445 |  | $ | 3,334 |  | $ | 3,175 |
Research and development | ​ | ​ | 3,014 | ​ | ​ | 2,993 | ​ | ​ | 6,062 | ​ | ​ | 5,311 | ​
Selling, general, and administrative | ​ | ​ | 4,646 | ​ | ​ | 4,795 | ​ | ​ | 9,463 | ​ | ​ | 8,829 | ​
Total | ​ | $ | 9,651 | ​ | $ | 9,233 | ​ | $ | 18,859 | ​ | $ | 17,315 | ​
​ For the six months ended June 30, 2025, equity activity related to non-vested restricted shares and performance shares was as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant Date
​ | ​ | Shares | ​ | Fair Value
​ | ​ | (in thousands) | ​ | ​ | ​
Balance - December 31, 2024 | ​ | 2,604 | ​ | $ | 32.53
Granted | ​ | 1,143 | ​ | ​ | 22.97
Performance award adjustments | ​ | (21) | ​ | ​ | 45.28
Vested | ​ | (883) | ​ | ​ | 31.77
Forfeited | ​ | (66) | ​ | ​ | 26.86
Balance - June 30, 2025 | ​ | 2,777 | ​ | $ | 28.87
​

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