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Note 10 - Income Taxes - Reconciliation of Income Tax Computed at U.S. Federal Statutory Tax Rate to Provision (Benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2025 | Dec. 28, 2024 | Dec. 30, 2023
Tax provision at U.S. Federal statutory rate |  | $ (13,105) |  | $ (13,638) | $ 9,470
Tax provision at U.S. Federal statutory rate, percent |  | 21.00% |  | 21.00% | 21.00%
State and local income taxes, net of federal income tax effect |  | $ 902 | [1] | $ (2,126) | $ (633)
State and local income taxes, net of federal income tax effect, percent | [1] | (1.40%) |  |  |
Tax on Global Intangible Low-Taxed Income (GILTI) |  | $ 2,543 |  | 2,613 | 1,735
Tax on Global Intangible Low-Taxed Income (GILTI), percent |  | (4.10%) |  |  |
Tax on Subpart F Income |  | $ 1,031 |  |  |
Tax on Subpart F Income, percent |  | (1.70%) |  |  |
Accruals, adjustments and releases from statute expirations |  |  |  | (2,372) | 579
Reversal of previously recognized unborn foreign tax credits |  | $ 4,853 |  |  |
Reversal of previously recognized unborn foreign tax credits, percent |  | (7.80%) |  |  |
Research and development credits |  | $ (2,002) |  | (1,103) | (1,360)
Research and development credits, percent |  | 3.20% |  |  |
Equity based employee compensation |  | $ 1,886 |  | 502 | (1,504)
Change in valuation allowance |  | $ 12,918 |  | 14,844 | 10,654
Change in valuation allowance, percent |  | (20.70%) |  |  |
Excess executive compensation |  |  |  | 715 | 1,375
Equity based employee compensation, percent |  | (3.00%) |  |  |
Other. nondeductible |  | $ (232) |  |  |
Other, nondeductible, percent |  | 0.40% |  |  |
Changes in unrecognized tax benefits |  | $ (3,164) |  |  |
Changes in unrecognized tax benefits, percent |  | 5.10% |  |  |
Foreign rate differential |  |  |  | 146 | 2,093
Withholding and other foreign taxes, net of foreign tax credit |  |  |  | 1,206 | 254
Other, net |  | $ 309 |  | 4,085 | (5,003)
Income Tax Expense (Benefit) |  | 11,866 |  | 4,872 | 17,660
FX of net investment hedge |  | $ (745) |  |  |
FX of net investment hedge, percent |  | 1.20% |  |  |
Other |  | $ 309 |  | $ 4,085 | $ (5,003)
Other, percent |  | (0.50%) |  |  |
Income tax expense, percent |  | (19.00%) |  |  |
Foreign Tax Jurisdiction [Member] | Federal Ministry of Finance, Germany [Member] |  |  |  |  |
Foreign rate differential |  | $ 646 |  |  |
Foreign rate differential, percent |  | (1.00%) |  |  |
Local income taxes |  | $ 1,460 |  |  |
Local income taxes, percent |  | (2.30%) |  |  |
Other |  | $ (269) |  |  |
Other, percent |  | 0.40% |  |  |
Foreign Tax Jurisdiction [Member] | Bureau of Internal Revenue, Philippines [Member] |  |  |  |  |
Other |  | $ 313 |  |  |
Other, percent |  | (0.50%) |  |  |
Local country tax holiday |  | $ (756) |  |  |
Local country tax holiday, percent |  | 1.20% |  |  |
Foreign Tax Jurisdiction [Member] | Swiss Federal Tax Administration (FTA) [Member] |  |  |  |  |
Other |  | $ 683 |  |  |
Other, percent |  | (1.10%) |  |  |
Withholding taxes |  | $ 1,326 |  |  |
Withholding taxes, percent |  | (2.10%) |  |  |
Foreign Tax Jurisdiction [Member] | Inland Revenue Board of Malaysia [Member] |  |  |  |  |
Change in valuation allowance |  | $ 3,490 |  |  |
Change in valuation allowance, percent |  | (5.60%) |  |  |
Other |  | $ 34 |  |  |
Other, percent |  | (0.10%) |  |  |
Foreign Tax Jurisdiction [Member] | Other Foreign Jurisdictions [Member] |  |  |  |  |
Other |  | $ (255) |  |  |
Other, percent |  | 0.40% |  |  |
[1] | State and local taxes in CA and TX comprise the majority of this category.

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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