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Summary of Significant Accounting Policies (Liquidity) - (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 04, 2026 | Jun. 27, 2026 | Mar. 28, 2026 | Jun. 28, 2025 | Mar. 29, 2025 | Jun. 27, 2026 | Jun. 28, 2025 | Dec. 27, 2025 | Dec. 28, 2024
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |
Net Income (Loss) |  | $ 1,403 | $ 8,645 | $ (6,078) | $ (9,487) | $ 10,048 | $ (15,565) |  |
Working capital deficit |  |  |  |  |  | 22,100 |  |  |
Total assets |  | 73,313 |  |  |  | 73,313 |  | $ 49,477 |
Cash, cash equivalents and restricted cash at end of period |  | 40,655 |  | 29,038 |  | 40,655 | 29,038 |  |
Total stockholders' equity (deficit) |  | $ 23,183 | $ 10,444 | $ (6,958) | $ (13,672) | $ 23,183 | $ (6,958) | $ (5,203) | $ (6,048)
Subsequent event | Patent Cross License Agreement |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |
Upfront license fee, net of withholding tax | $ 200,000 |  |  |  |  |  |  |  |

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