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Note 14 - Equity Incentive Plan - Total Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Stock-based compensation expense | $ 12,158 | $ 13,537 | $ 13,611
Cost of Sales [Member] |  |  |
Stock-based compensation expense | 328 | 575 | 779
Research and Development Expense [Member] |  |  |
Stock-based compensation expense | 1,612 | 1,934 | 1,563
Selling, General and Administrative Expenses [Member] |  |  |
Stock-based compensation expense | $ 10,218 | $ 11,028 | $ 11,269

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