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Note 9 - Stock-Based Compensation - Summary of Compensation Costs Related to Stock-Based Compensation Awards (Details) - 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
Allocated share based compensation expense | $ 738 | $ 820 | $ 2,017 | $ 2,344
Cost of Sales [Member] |  |  |  |
Allocated share based compensation expense | 50 | 73 | 159 | 246
Selling, General and Administrative Expenses [Member] |  |  |  |
Allocated share based compensation expense | 585 | 623 | 1,535 | 1,702
Research and Development Expense [Member] |  |  |  |
Allocated share based compensation expense | $ 103 | $ 124 | $ 323 | $ 396

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- Definition Amount, after tax, of expense for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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