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Note 11 - Business Segment and Geographic Financial Data - Geographic Segment Financial Data (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Revenues | $ 6,382 | $ 4,957 |
Assets | 46,709 |  | $ 48,797
UNITED STATES |  |  |
Revenues | 5,359 | 3,595 |
Assets | 42,788 |  | 44,430
Non-US [Member] |  |  |
Revenues | 1,023 | $ 1,362 |
Assets | $ 3,921 |  | $ 4,367

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