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Note 5 - Stock-Based Compensation - Allocation of Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Stock-based compensation expense | $ 1,260 | $ 2,831
Stock-based compensation capitalized to software and patent costs | 5 | 17
Total stock-based compensation | 1,265 | 2,848
Cost of Sales [Member] |  |
Stock-based compensation expense | 137 | 253
Selling and Marketing Expense [Member] |  |
Stock-based compensation expense | 355 | 712
Research and Development Expense [Member] |  |
Stock-based compensation expense | 407 | 618
General and Administrative Expense [Member] |  |
Stock-based compensation expense | $ 361 | $ 1,248

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