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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 30, 2023 | Dec. 31, 2022
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Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Tax credits | $ 29,074 | $ 33,025
Inventory reserve | 14,626 | 14,269
Other reserves and accruals | 9,580 | 6,527
Non-statutory stock options | 2,771 | 3,180
Lease liability | 6,175 | 6,024
Research and development expenditures capitalization | 51,698 | 36,821
Net operating loss carryforwards | 17,484 | 18,173
Gross deferred tax assets | 131,408 | 118,019
Valuation allowance | (45,864) | (43,295)
Total deferred tax assets | 85,544 | 74,724
Right-of-use assets | (5,445) | (5,219)
Acquired intangibles and fixed assets | (863) | (4,342)
Unrealized investment gains | (103) | (103)
Tax on undistributed earnings | (169) | (146)
Total deferred tax liabilities | (6,580) | (9,810)
Net deferred tax assets | $ 78,964 | $ 64,914

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