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Note 11 - Properties and Equipment, Accrued Expenses, Other Current Liabilities, and Other Liabilities (Details Textual) $ in Thousands, € in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2025 EUR (€) | Mar. 31, 2024 USD ($) | Dec. 31, 2024
Number of Vessels | 214 | 214 |  | 211
Proceeds from Sale of Productive Assets | $ 3,816 |  | $ 12,463 |
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | $ 2,538 |  | $ 11,039 |
Crew Boats [Member] |  |  |  |
Number of Vessels | 1 | 1 |  |
Down Payment To Start Construction On Crew Boats | $ 400 | € 0.4 |  |
Expected Cost of Boats | $ 1,700 | € 1.6 |  |
Vessel [Member] |  |  |  |
Number of Vessels Sold | 2 | 2 | 3 |
Proceeds from Sale of Productive Assets | $ 3,800 |  | $ 12,500 |
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | $ 2,500 |  | $ 11,000 |

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482130/360-10-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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