Note 9 - Intangible Assets, Net

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

Note 9.  Intangible Assets, net

Intangible assets consisted of the following for the periods indicated (in thousands):

	June 30, 2024
	Gross		Accumulated			Intangible
	Amount		amortization			assets, net
Patents	$	9,641	$	(6,166	)	$	3,475
Trademarks		183		(42	)		141
Total intangible assets	$	9,824	$	(6,208	)	$	3,616

	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

For the three months ended June 30, 2024 and 2023, amortization expense for intangible assets, included in general and administrative expenses on the statement of operations, was $0.1 million and $0.2 million, respectively. For the six months ended June 30, 2024 and 2023, amortization expense for intangible assets, included in general and administrative expenses on the statement of operations, was $0.2 million and $0.3 million, respectively. The remaining weighted average amortization period for intangible assets is approximately 9.0 years.

On June 30, 2024, future amortization expenses for intangible assets for future periods are estimated to be (in thousands):

2024(remaining 6 months)	$	229
2025		459
2026		459
2027		459
2028		459
2029 and thereafter		1,551
	$	3,616