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Note 11 - Stock-based Compensation - Schedule of Allocation of Recognized Period Cost (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2025 | Jun. 30, 2024 | Jun. 29, 2025 | Jun. 30, 2024
Total costs and expenses | $ 843 | $ 759 | $ 1,779 | $ 2,225
Cost of Sales [Member] |  |  |  |
Total costs and expenses | 189 | 140 | 347 | 438
Research and Development Expense [Member] |  |  |  |
Total costs and expenses | 205 | 102 | 347 | 301
Selling, General and Administrative Expenses [Member] |  |  |  |
Total costs and expenses | $ 449 | $ 517 | $ 1,085 | $ 1,486

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