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Note 9 - Intangible Assets, Net

3 Months Ended

Mar. 31, 2025

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

Note 9.  Intangible Assets, net

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

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		March 31, 2025
​		Gross				Accumulated				Intangible
​		Amount				amortization				assets, net
Patents		$	9,920			$	(6,448	)		$	3,472
Trademarks			225				(63	)			162
Total intangible assets		$	10,145			$	(6,511	)		$	3,634

		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

​

For the three months ended March 31, 2025 and 2024, amortization expense for intangible assets, included in general and administrative expenses on the statement of operations, was $0.2 million and $0.1 million, respectively. The remaining weighted average amortization period for intangible assets is approximately 9 years.

On March 31, 2025, future amortization expenses for intangible assets for future periods are estimated to be (in thousands):

2025 (remaining 9 months)		$	323
2026			430
2027			430
2028			430
2029			430
2030 and thereafter			1,591
		$	3,634

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The entire disclosure for all or part of the information related to intangible assets.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/350-30/tableOfContent

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-Topic 350
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-URI https://asc.fasb.org/1943274/2147482665/350-30-50-4

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-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/985-20/tableOfContent

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