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Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended | 15 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 27, 2025 USD ($) | Sep. 28, 2024 USD ($) | Apr. 02, 2022 | Sep. 27, 2025 USD ($) segment | Sep. 28, 2024 USD ($) | Sep. 27, 2025 USD ($) | Jan. 01, 2022 USD ($) | Apr. 02, 2022 | Jul. 09, 2025 USD ($) | Dec. 28, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  | 3 |  |  |  |  |  |
Bank guarantees, expiration period (in months) |  |  |  | 12 months |  |  |  |  |  |
Intangible assets | $ 270,775 |  |  | $ 270,775 |  | $ 270,775 |  |  |  | $ 279,494
Intangible assets of amortization |  |  |  | 200 |  |  |  |  |  |
Impairment charge | 287 | $ 0 |  | 287 | $ 0 |  |  |  |  |
Revenue recognized | 6,064 | $ 8,897 |  | 36,861 | 66,036 |  |  |  |  |
Revenue, remaining performance obligation, amount | 27,990 |  |  | 27,990 |  | 27,990 |  |  |  |
Proceeds from sale of property, plant, and equipment |  |  |  | $ 136 | $ 1,320 |  |  |  |  |
Banker's acceptance drafts, maturity period (in months) |  |  |  | 6 months |  |  |  |  |  |
Banker's acceptance drafts | 8,861 |  |  | $ 8,861 |  | 8,861 |  |  |  | $ 5,299
Babbini |  |  |  |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | $ 5,278 |
CHINA | Land and Building |  |  |  |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property, plant, and equipment |  |  |  |  |  |  | $ 25,159 |  |  |
Down payment percentage |  |  |  |  |  |  |  | 31.00% |  |
Period of recognition of gain on sale and a receivable for remaining amount of sales proceeds (in years) |  |  | 2 years |  |  |  |  |  |  |
Amount of receivable settled by government |  |  |  |  |  | 1,803 |  |  |  |
Nontrade receivables, current | $ 13,592 |  |  | $ 13,592 |  | $ 13,592 |  |  |  |
Certain Capital Contracts |  |  |  |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Lead time for for certain capital contracts (up to) (in months) |  |  |  | 24 months |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-09-28 |  |  |  |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue, remaining performance obligation, percent | 78.00% |  |  | 78.00% |  | 78.00% |  |  |  |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |  |  | 12 months |  | 12 months |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-09-28 |  |  |  |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue, remaining performance obligation, percent | 22.00% |  |  | 22.00% |  | 22.00% |  |  |  |
Revenue, remaining performance obligation, expected timing of satisfaction, period |  |  |  |  |  |  |  |  |  |

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