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v3.26.1

Note 2 - Risks and Uncertainties (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2026 | Mar. 31, 2026 | Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Retained Earnings (Accumulated Deficit), Total | $ (192,949) |  |  |  | $ (192,949) |  | $ (172,768) |
Net Income (Loss) Attributable to Parent, Total | (10,139) | $ (10,042) | $ (7,699) | $ (7,707) | (20,181) | $ (15,406) |  |
Net Cash Provided by (Used in) Operating Activities, Total |  |  |  |  | (17,196) | (14,747) |  |
Cash, Cash Equivalents, and Short-Term Investments, Total | 43,500 |  |  |  | 43,500 |  |  |
Working Capital | 37,700 |  |  |  | 37,700 |  |  |
Stockholders' Equity Attributable to Parent, Ending Balance | 38,338 | $ 47,235 | $ 27,170 | $ 33,954 | 38,338 | $ 27,170 | $ 56,111 | $ 40,718
Approximation [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent, Ending Balance | $ 38,300 |  |  |  | $ 38,300 |  |  |

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