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Note 8 - Assets Held for Sale, Asset Sales and Asset Impairments - Summary of Vessel Sales and Gains on Sales of Vessels (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Gain on sale of vessels | $ 15,762 | $ 8,701 | $ 250
Total vessels sold/recycled | 6 | 7 | 12
Vessels Held for Sale [Member] |  |  |
Gain on sale of vessels | $ 0 | $ 3,088 | $ 5
Vessels sold/recycled from assets held for sale | (0) | 8 | 12
Vessels, Active Fleet [Member] |  |  |
Vessels sold from active fleet | 6 | 7 | 2
Gain on sale of vessels | $ 15,677 | $ 5,613 | $ 553
Vessel [Member] |  |  |
Gain on sale of vessels | $ 15,677 | $ 8,701 | $ 558
Total vessels sold/recycled | 6 | 15 | 14

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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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