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Stock-Based Awards (Stock Based Compensation) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2026 | Jun. 28, 2025 | Jun. 27, 2026 | Jun. 28, 2025
Stock-Based Awards |  |  |  |
Stock-Based Compensation, Total | $ 809 | $ 1,013 | $ 1,765 | $ 1,984
Unearned stock-based compensation | 9,200 |  | $ 9,200 |
Expects to recognize over a weighted-average period |  |  | 3 years 3 months 18 days |
Cost of sales |  |  |  |
Stock-Based Awards |  |  |  |
Stock-Based Compensation, Total | 32 | 42 | $ 47 | 50
Research and development |  |  |  |
Stock-Based Awards |  |  |  |
Stock-Based Compensation, Total | 106 | 137 | 281 | 345
Selling, general and administrative |  |  |  |
Stock-Based Awards |  |  |  |
Stock-Based Compensation, Total | $ 671 | $ 834 | $ 1,437 | $ 1,589

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