Note 9 - Intangible Assets, Net - Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Intangible assets, gross amount | $ 10,752 | $ 10,506 |
| Intangible assets, accumulated amortization | (7,119) | (6,883) |
| Intangible assets, net | 3,633 | 3,623 |
| Patents [Member] | ||
| Intangible assets, gross amount | 10,500 | 10,263 |
| Intangible assets, accumulated amortization | (7,015) | (6,797) |
| Intangible assets, net | 3,485 | 3,466 |
| Trademarks [Member] | ||
| Intangible assets, gross amount | 252 | 243 |
| Intangible assets, accumulated amortization | (104) | (86) |
| Intangible assets, net | $ 148 | $ 157 |
| 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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- 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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