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Note 11 - Properties and Equipment, Accrued Expenses, Other Current Liabilities and Other Liabilities (Details Textual) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2024
Number of Vessels | 211 |  | 211
Proceeds from Sale of Productive Assets | $ 11,084 | $ 14,817 |
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | $ 8,018 | $ 13,039 |
Vessel [Member] |  |  |
Number of Vessels Sold | 6 | 4 |
Proceeds from Sale of Productive Assets | $ 11,100 | $ 14,800 |
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | $ 8,000 | $ 13,000 |

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