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Note 11 - Stock-Based Compensation - Stock-based Compensation Expense (Details) - Continuing Operations [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Share-based compensation | $ 324 | $ 1,053 | $ 1,396 | $ 3,379
Cost of Sales [Member] |  |  |  |
Share-based compensation | 18 | (30) | 79 | 88
Selling and Marketing Expense [Member] |  |  |  |
Share-based compensation | 122 | 164 | 346 | 453
General and Administrative Expense [Member] |  |  |  |
Share-based compensation | 104 | 795 | 703 | 2,493
Research and Development Expense [Member] |  |  |  |
Share-based compensation | $ 80 | $ 124 | $ 268 | $ 345

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