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Note 17. Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation Expense Recognized in the Consolidated Statements of Operations
The following table presents share-based compensation expense recognized in our consolidated statements of operations for the years ended December 31, 2024, 2023, and 2022 (in thousands):
 202420232022
Cost of sales$3,923 $4,798 $3,174 
Selling, general and administrative20,696 25,217 22,367 
Research and development3,502 4,133 3,080 
Production start-up(17)71 35 
Total share-based compensation expense$28,104 $34,219 $28,656 
Schedule of Restricted Stock and Performance Unit Activity
The following is a summary of our restricted stock unit activity, including performance unit activity, for the year ended December 31, 2024:
 
 
 
 
Number of Shares
Weighted-Average
Grant-Date
Fair Value
Unvested restricted stock units at December 31, 2023
960,448$106.25 
Restricted stock units granted (1)215,849158.63 
Restricted stock units vested(331,153)75.44 
Restricted stock units forfeited(30,806)123.81 
Unvested restricted stock units at December 31, 2024
814,338$132.00 
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(1)Restricted stock units granted include the maximum amount of performance units available for issuance under our long-term incentive program for key executive officers and associates. The actual number of shares to be issued will depend on the relative attainment of the performance metrics described above.