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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 28, 2024 | Dec. 30, 2023
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Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Tax credits | $ 31,196 | $ 29,074
Inventory reserve | 12,818 | 14,626
Other reserves and accruals | 10,600 | 9,580
Non-statutory stock options | 2,213 | 2,771
Lease liability | 4,857 | 6,175
Research and development expenditures capitalization | 65,520 | 51,698
Net operating loss carryforwards | 17,295 | 17,484
Gross deferred tax assets | 144,499 | 131,408
Valuation allowance | (47,938) | (45,864)
Total deferred tax assets | 96,561 | 85,544
Right-of-use assets | (4,104) | (5,445)
Acquired intangibles and fixed assets | (445) | (863)
Unrealized investment gains | 0 | (103)
Tax on undistributed earnings | 0 | (169)
Total deferred tax liabilities | (4,549) | (6,580)
Net deferred tax assets | $ 92,012 | $ 78,964

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