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Business Combination - Schedule of Provisional Fair Value of Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Sep. 28, 2025 | Dec. 29, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Net assets acquired: |  |  |
Cash |  | $ 1,000 |
Accounts receivable | $ 257 | 11,999 |
Contract assets |  | 4,615 |
Inventories |  | 27,706 |
Prepaid expenses and other current assets | 387 | 2,219 |
Property and equipment | 241 | 5,867 |
Operating lease right-of-use assets | 313 | 2,506 |
Other noncurrent assets | 552 | 541 |
Intangibles |  | 18,100 |
Deferred revenue |  | (7,361) |
Accounts payable | (184) | (5,270) |
Accrued expenses and other current liabilities |  | (13,955) |
Operating lease liabilities | 215 | (2,963) |
Other long-term liabilities |  | (8,980) |
Fair value of net assets acquired |  | 36,024 |
Consideration transferred | 42,911 | 54,500 |
Goodwill recognized | $ 42,911 | $ 18,476 |

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