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Note 13 - Segment Information - Segment Information 2 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Total share-based compensation | $ 1,118 | $ 771 | $ 1,940 | $ 1,638
Single Reportable Segment [Member] |  |  |  |
Total operating expenses, excluding share-based compensation | 9,380 | 7,236 | 19,040 | 14,513
Total share-based compensation | 1,118 | 771 | 1,940 | 1,638
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense |  |  |  |
Total share-based compensation | 606 | 538 | 1,125 | 1,216
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense | Single Reportable Segment [Member] |  |  |  |
Total operating expenses, excluding share-based compensation | 1,739 | 1,647 | 3,715 | 3,457
Total share-based compensation | 606 | 538 | 1,125 | 1,216
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense |  |  |  |
Total share-based compensation | 512 | 233 | 815 | 422
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | Single Reportable Segment [Member] |  |  |  |
Total operating expenses, excluding share-based compensation | 7,641 | 5,589 | 15,325 | 11,056
Total share-based compensation | $ 512 | $ 233 | $ 815 | $ 422

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