Note 9 - Patents and Trademarks, Net - Patents and Trademarks (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Intangible assets, gross | $ 2,400 | $ 2,400 |
| Accumulated amortization | (2,389) | (2,379) |
| Total | 11 | 21 |
| Purchased and Licensed Patent Rights [Member] | ||
| Intangible assets, gross | 566 | 566 |
| Internally Developed Patents [Member] | ||
| Intangible assets, gross | 1,686 | 1,686 |
| Trademarks [Member] | ||
| Intangible assets, gross | $ 148 | $ 148 |
| X | ||||||||||
- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, before accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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