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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Before Income Taxes | The components of income before income taxes were as follows (in thousands):
| Fiscal Year Ended
| December 31, 2022 |  | December 25, 2021 |  | December 26, 2020
United States | $ | 30,047 |  |  | $ | 74,298 |  |  | $ | 72,950 |
Foreign | 27,823 |  |  | 24,202 |  |  | 12,225 |
| $ | 57,870 |  |  | $ | 98,500 |  |  | $ | 85,175 |
Schedule of Components of Provision for Income Taxes | The components of the provision for income taxes are as follows (in thousands):
| Fiscal Year Ended
| December 31, 2022 |  | December 25, 2021 |  | December 26, 2020
Current provision: |  |  |  |  |
Federal | $ | 4,330 |  |  | $ | 2,334 |  |  | $ | 1,799 |
State | 520 |  |  | 712 |  |  | 1,194 |
Foreign | 8,625 |  |  | 7,661 |  |  | 4,278 |
| 13,475 |  |  | 10,707 |  |  | 7,271 |
Deferred provision (benefit): |  |  |  |  |
Federal | (5,886) |  |  | 4,651 |  |  | 1,472 |
State | 118 |  |  | 522 |  |  | (267) |
Foreign | (575) |  |  | (1,304) |  |  | (1,824) |
| (6,343) |  |  | 3,869 |  |  | (619) |
Total provision for income taxes | $ | 7,132 |  |  | $ | 14,576 |  |  | $ | 6,652 |
Schedule of Effective Income Tax Rate Reconciliation | The following is a reconciliation of the difference between income taxes computed by applying the federal statutory rate of 21% and the provision from income taxes (in thousands):
| Fiscal Year Ended
| December 31, 2022 |  | December 25, 2021 |  | December 26, 2020
U.S. statutory federal tax rate | $ | 12,153 |  |  | $ | 20,685 |  |  | $ | 17,887 |
State taxes and credits, net of federal benefit | 16 |  |  | 811 |  |  | 663 |
Stock-based compensation | (2,772) |  |  | (6,118) |  |  | (4,962) |
Research and development credits | (8,264) |  |  | (7,153) |  |  | (6,576) |
Foreign taxes at rates different than the U.S. | 2,404 |  |  | 2,286 |  |  | 415 |
Other permanent differences | 1,964 |  |  | 2,043 |  |  | 400 |
Global intangible low-taxed income | 7 |  |  | — |  |  | — |
Foreign derived intangible income | (5,160) |  |  | (2,486) |  |  | (3,668) |
Change in valuation allowance | 2,597 |  |  | 2,231 |  |  | 1,862 |
Tax contingencies, net of reversals | 3,124 |  |  | 2,812 |  |  | 2,712 |
Other | 1,063 |  |  | (535) |  |  | (2,081) |
Total | $ | 7,132 |  |  | $ | 14,576 |  |  | $ | 6,652 |
Schedule of Deferred Tax Assets and Liabilities | Significant deferred tax assets and liabilities consisted of the following (in thousands):
| As of |
| December 31, 2022 |  | December 25, 2021 |
Tax credits | $ | 33,025 |  |  | $ | 41,650 |  |
Inventory reserve | 14,269 |  |  | 13,691 |  |
Other reserves and accruals | 6,527 |  |  | 8,523 |  |
Non-statutory stock options | 3,180 |  |  | 2,837 |  |
Lease liability | 6,024 |  |  | 6,717 |  |
Research and development expenditures capitalization | 36,821 |  |  | 19,553 |  |
Net operating loss carryforwards | 18,173 |  |  | 18,395 |  |
Gross deferred tax assets | 118,019 |  |  | 111,366 |  |
Valuation allowance | (43,295) |  |  | (40,698) |  |
Total deferred tax assets | 74,724 |  |  | 70,668 |  |
Right-of-use assets | (5,219) |  |  | (5,910) |  |
Acquired intangibles and fixed assets | (4,342) |  |  | (6,163) |  |
Unrealized investment gains | (103) |  |  | (105) |  |
Tax on undistributed earnings | (146) |  |  | (118) |  |
Total deferred tax liabilities | (9,810) |  |  | (12,296) |  |
Net deferred tax assets | $ | 64,914 |  |  | $ | 58,372 |  |
Summary of Tax Credit Carryforwards | Tax credits and carryforwards available to us at December 31, 2022 consisted of the following (in thousands):
|  | Amount |  | Latest Expiration Date
Federal research and development tax credit |  | $ | 26,424 |  |  | 2034-2042
Foreign tax credit carryforwards |  | 995 |  |  | 2023-2027
California research credits |  | 52,131 |  |  | Indefinite
State net operating loss carryforwards |  | 249,087 |  |  | 2025-Indefinite
Singapore net operating loss carryforwards |  | 5,724 |  |  | Indefinite
Schedule of Unrecognized Tax Benefits | The following table reflects changes in the unrecognized tax benefits (in thousands):
| Fiscal Year Ended
| December 31, 2022 |  | December 25, 2021 |  | December 26, 2020
Unrecognized tax benefit, beginning balance | $ | 35,745 |  |  | $ | 32,497 |  |  | $ | 28,800 |
Additions based on tax positions related to the current year | 3,868 |  |  | 3,201 |  |  | 3,072 |
Additions based on tax positions from prior years | 795 |  |  | 124 |  |  | 702 |
Reductions for tax positions of prior years | — |  |  | — |  |  | — |
Reductions due to lapse of the applicable statute of limitations | (310) |  |  | (77) |  |  | (77) |
Unrecognized tax benefit, ending balance | $ | 40,098 |  |  | $ | 35,745 |  |  | $ | 32,497 |
Interest and penalties recognized as a component of provision for income taxes | $ | 30 |  |  | $ | 40 |  |  | $ | 50 |
Interest and penalties accrued at period end | 85 |  |  | 188 |  |  | 204 |

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