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v3.25.1

Stock-Based Compensation Expense (Tables) | 3 Months Ended
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Mar. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | Stock-based compensation expense before income tax expense for the three-month periods ended March 31, 2025 and 2024 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ |  | 2025 |  | 2024
Cost of sales | ​ | ​ | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | $ | 346 | ​ | $ | 362
Restricted stock units | ​ | ​ | 282 | ​ | ​ | —
Total cost of sales | ​ | ​ | 628 | ​ | ​ | 362
Research and development | ​ |  | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | ​ | 326 | ​ |  | 436
Restricted stock units | ​ | ​ | 343 | ​ | ​ | —
Total research and development | ​ | ​ | 669 | ​ | ​ | 436
Selling, general and administrative | ​ |  | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | ​ | 1,283 | ​ |  | 1,682
Performance-based restricted stock units | ​ | ​ | 3,581 | ​ | ​ | 1,867
Restricted stock units | ​ | ​ | 1,724 | ​ | ​ | 587
Cash-settled performance-based awards | ​ | ​ | 1,193 | ​ | ​ | 300
Total selling, general and administrative | ​ | ​ | 7,781 | ​ | ​ | 4,436
​ | ​ | ​ | ​ | ​ | ​ | ​
Stock-based compensation expense before taxes | ​ | $ | 9,078 | ​ | $ | 5,234
Stock-Settled Performance-Based Restricted Stock Units |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ | ​ | 2025 | ​ | 2024
Risk-free interest rate |  | 4.0% |  | 4.4%
Performance period |  | 2.8 years |  | 2.8 years
Expected dividend yield |  | — |  | —
Expected price volatility |  | 28.0% |  | 31.1%

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Line items represent financial concepts included in a table. 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