Benefits Plans (Stock Based Compensation) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 27, 2025 |
Dec. 28, 2024 |
|
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Stock-Based Compensation, Total | $ 3,438 | $ 4,436 |
| Unearned stock-based compensation | $ 4,800 | |
| Expects to recognize over a weighted-average period | 2 years 3 months 18 days | |
| Cost of sales | ||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Stock-Based Compensation, Total | $ 83 | 99 |
| Research and development | ||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Stock-Based Compensation, Total | 552 | 908 |
| Selling, general and administrative | ||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Stock-Based Compensation, Total | $ 2,803 | $ 3,429 |