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Note 9 - Stock-Based Compensation - Schedule of Stock Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
stock compensation expense | $ 644 | $ 1,249 | $ 2,828 | $ 3,520
Selling and Marketing Expense [Member] |  |  |  |
stock compensation expense | 210 | 315 | 708 | 968
Research and Development Expense [Member] |  |  |  |
stock compensation expense | 154 | 318 | 573 | 827
General and Administrative Expense [Member] |  |  |  |
stock compensation expense | $ 280 | $ 616 | $ 1,547 | $ 1,725

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