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Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Share-based Compensation |
Schedule of share-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, | ​ | Nine months ended September 30, | ​
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
​ | ​ | (in thousands) | ​
Cost of sales |  | $ | 1,771 |  | $ | 1,565 |  | $ | 5,105 |  | $ | 4,740 |
Research and development | ​ | ​ | 2,840 | ​ | ​ | 3,111 | ​ | ​ | 8,902 | ​ | ​ | 8,422 | ​
Selling, general, and administrative | ​ | ​ | 4,534 | ​ | ​ | 4,783 | ​ | ​ | 13,997 | ​ | ​ | 13,612 | ​
Total | ​ | $ | 9,145 | ​ | $ | 9,459 | ​ | $ | 28,004 | ​ | $ | 26,774 | ​
Summary of non-vested restricted and performance shares activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant Date
​ | ​ | Shares | ​ | Fair Value
​ | ​ | (in thousands) | ​ | ​ | ​
Balance - December 31, 2024 | ​ | 2,604 | ​ | $ | 32.53
Granted | ​ | 1,172 | ​ | ​ | 22.94
Performance award adjustments | ​ | (21) | ​ | ​ | 45.28
Vested | ​ | (898) | ​ | ​ | 31.63
Forfeited | ​ | (102) | ​ | ​ | 26.73
Balance - September 30, 2025 | ​ | 2,755 | ​ | $ | 28.86
​

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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