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Note O - Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Net operating loss carryforwards | $ 100,552 | $ 90,743
Research and development tax carryforward | 19,153 | 20,670
Stock-based compensation | 5,711 | 5,154
174 expenses | 33,941 | 30,241
Right-of-use liability | 108 | 265
Property and equipment | (79) | (23)
Other deferred tax assets | 3,652 | 1,951
Total gross deferred tax assets | 163,196 | 149,047
Right-of-use asset | 82 | 249
Intangibles | 17,859 | 14,473
Total gross deferred tax liabilities | 17,941 | 14,722
Deferred tax assets less liabilities | 145,256 | 134,324
Valuation allowance | (146,359) | (134,488)
Net deferred tax liability | $ (1,103) | $ (164)

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