Note 1 - Summary of Significant Accounting Policies - Reported Share-based Compensation in Consolidated Financial Statements 2 (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 26, 2026 |
Sep. 27, 2025 |
Sep. 26, 2026 |
Sep. 27, 2025 |
|
| Share Based Compensation Expense | $ 4,625 | $ 5,659 | $ 17,494 | $ 17,564 |
| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization | ||||
| Share Based Compensation Expense | 274 | 341 | 767 | 1,064 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Share Based Compensation Expense | 1,094 | 1,356 | 3,135 | 4,089 |
| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | ||||
| Share Based Compensation Expense | $ 3,257 | $ 3,962 | $ 13,592 | $ 12,411 |