Note 1 - Organization and Significant Accounting Policies - Summary of Intangible Asset Activity (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Gross Carrying Amount	$ 1,207	$ 852
Accumulated Amortization	(561)	(525)
Net Carrying Amount	646	327
Patents [Member]
Gross Carrying Amount	867	852
Accumulated Amortization	(561)	(525)
Net Carrying Amount	$ 306	327
Patents [Member] \| Minimum [Member]
Amortization Period (Year)	1 year
Patents [Member] \| Maximum [Member]
Amortization Period (Year)	20 years
Other Intangible Assets [Member]
Amortization Period (Year)	10 years
Gross Carrying Amount	$ 340	0
Accumulated Amortization	0	0
Net Carrying Amount	$ 340	$ 0

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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