Note I - Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31, 2024
	Gross		Accumulated			Intangible
	Amount		amortization			assets, net
Patents	$	9,873	$	(6,355	)	$	3,518
Trademarks		218		(56	)		162
Total intangible assets	$	10,091	$	(6,411	)	$	3,680

	December 31, 2023
	Gross		Accumulated			Intangible
	Amount		amortization			assets, net
Patents	$	9,502	$	(5,981	)	$	3,521
Trademarks		138		(31	)		107
Total intangible assets	$	9,640	$	(6,012	)	$	3,628

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

	December 31, 2024
2025	$	438
2026		438
2027		438
2028		438
2029		438
Thereafter		1,490
Total	$	3,680