Note 9 - Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

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

	March 31, 2024
	Gross		Accumulated			Intangible
	Amount		amortization			assets, net
Patents	$	9,553	$	(6,081	)	$	3,472
Trademarks		174		(36	)		138
Total intangible assets	$	9,727	$	(6,117	)	$	3,610

	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]

2024(remaining 9 months)	$	388
2025		517
2026		517
2027		517
2028		517
2029 and thereafter		1,154
	$	3,610