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)

Amount of deferred tax liability attributable to taxable temporary differences.

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