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Significant Accounting Policies - Government incentives (Details) $ in Millions | 12 Months Ended
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Dec. 28, 2024 USD ($)
Government Assistance [Line Items] |
Government incentive receivable, current | $ 5.2
Government Assistance, Asset, Current, Statement of Financial Position [Extensible Enumeration] | Prepaid expenses and other current assets
Government incentive receivable, noncurrent | $ 4.9
Government Assistance, Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other assets, net
Government Assistance, Asset, Decrease, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Property and equipment, net
Decrease in property, plant and equipment from government incentives | $ 1.1
Cost of revenues |
Government Assistance [Line Items] |
Government Assistance, Operating Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration] | Cost of revenues
Decrease in operating expense from government incentives | $ 0.7
Research and development |
Government Assistance [Line Items] |
Government Assistance, Operating Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration] | Research and development
Decrease in operating expense from government incentives | $ 4.0

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