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Note 10 - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2025 | Dec. 28, 2024 | Dec. 30, 2023
Deferred Tax Assets, Valuation Allowance | $ 143,482 | $ 114,517 |
Increase (Decrease) of Net Income Due to Impact of Tax Holidays | $ 800 | $ 1,000 | $ 3,800
Increase (Decrease) of Earning Per Share Due To Impact Of Tax Holidays (in dollars per share) | $ 0.02 | $ 0.02 | $ 0.08
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 3,500 | $ 5,200 | $ 7,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 500 | 500 |
Unrecognized Tax Benefits, Interest Expense, Net of Accrued Interest Reversed | $ (300) | (200) | $ (100)
Minimum [Member] |  |  |
Collection Term Range (Year) | 4 years |  |
Maximum [Member] |  |  |
Collection Term Range (Year) | 10 years |  |
Domestic Tax Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | $ 244,800 |  |
Tax Credit Carryforward, Amount | $ 6,100 |  |
Open Tax Year | 2022 2023 2024 2025 |  |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | $ 132,300 |  |
Tax Credit Carryforward, Amount |  | $ 28,900 |
Open Tax Year | 2020 2021 2022 2023 2024 2025 |  |
Foreign Tax Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | $ 17,400 |  |

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