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Note 9 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 25, 2021
--- | --- | ---
Inventory, receivable and warranty reserves | $ 13,599 | $ 12,166
Net operating loss carryforwards | 39,545 | 44,806
Tax credit carryforwards | 29,646 | 31,264
Capitalized R&D | 19,819 | 8,728
Accrued employee benefits | 4,416 | 5,695
Stock-based compensation | 2,990 | 2,222
Lease liabilities | 3,965 | 4,500
Other | 472 | 2,674
Gross deferred tax assets | 114,452 | 112,055
Less valuation allowance | (89,234) | (76,250)
Total deferred tax assets | 25,218 | 35,805
Intangible assets and other acquisition basis differences | 38,921 | 48,657
Operating lease right-of-use assets | 3,573 | 4,066
Unremitted earnings of foreign subsidiaries | 153 | 4,207
Total deferred tax liabilities | 42,647 | 56,930
Net deferred tax liabilities | (17,429) | (21,125)
Other assets (long-term) | 3,930 | 4,762
Long-term deferred income tax liabilities | $ (21,359) | $ (25,887)

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