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Note 4 - Supplemental Balance Sheet Information - Amortization of Intangible Assets 2 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Amortization of intangible assets | $ 268 | $ 410 | $ 535 | $ 815
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense |  |  |  |
Amortization of intangible assets | 5 | 32 | 10 | 61
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense |  |  |  |
Amortization of intangible assets | $ 263 | $ 378 | $ 525 | $ 754

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