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Note 1 - Summary of Significant Accounting Policies - Reported Share-based Compensation in Consolidated Financial Statements (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 01, 2023 | Mar. 26, 2022
Share-based compensation of continuing operations | $ 3,914 | $ 3,422
Income tax benefit | (2,776) | (1,626)
Total share-based compensation, net | 1,138 | 1,796
Cost of Sales [Member] |  |
Share-based compensation of continuing operations | 180 | 145
Research and Development Expense [Member] |  |
Share-based compensation of continuing operations | 866 | 752
Selling, General and Administrative Expenses [Member] |  |
Share-based compensation of continuing operations | $ 2,868 | $ 2,525

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