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Note 6 - Property and Equipment - Depreciation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Selling, general and administrative expenses | $ 489 | $ 457
Total depreciation | 1,204 | 1,073
Product [Member] |  |
Cost of sales | 503 | 468
Service [Member] |  |
Cost of sales | $ 212 | $ 148

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