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Note 6 - Property and Equipment, Net (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Depreciation, Total | $ 3,046,000 | $ 2,887,000 | $ 3,190,000
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] | Impairment of long-lived assets | Impairment of long-lived assets |
Impairment, Long-Lived Asset, Held-for-Use | $ 4,506,000 | $ 1,491 |
Continuing Operations [Member] |  |  |
Depreciation, Total | $ 3,046,000 | $ 2,730,000 |

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