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Note 1 - Basis of Presentation and General Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Year ended December 31,
Charterer |  | 2021 |  |  | 2022 |  |  | 2023 |
Zim Integrated Shipping Services Ltd. |  |  | - |  |  |  | 21 | % |  |  | 23 | %
Maersk Line A/S |  |  | 21 | % |  |  | 21 | % |  |  | 23 | %
Sealand Maersk Asia Pte. Ltd. |  |  | - |  |  |  | 21 | % |  |  | 15 | %
Asyad Line LLC |  |  | - |  |  |  | - |  |  |  | 11 | %
CMA CGM, Marseille |  |  | 24 | % |  |  | 11 | % |  |  | 10 | %
Vasi Shipping Pte. Ltd., Singapore |  |  | 15 | % |  |  | - |  |  |  | - |

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