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Note 3 - Revenues - Deferred Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Deferred revenue | $ 3,806 | $ 4,508 | $ 3,370
Deferred revenue | (702) | 1,138 |
Service [Member] |  |  |
Deferred revenue | 2,366 | 2,849 | 1,530
Deferred revenue | (483) | 1,319 |
Customer Advances [Member] |  |  |
Deferred revenue | 1,440 | 1,659 | $ 1,840
Deferred revenue | $ (219) | $ (181) |

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