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Note 15 - Asset Dispositions, Assets Held for Sale and Asset Impairments (Details Textual) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019
Number of Vessels, Held for Sale | 24 | 46 | 38 |  | 24 | 46 | 46
Number of Additional Vessels to be Sold | 0 | 22 | 0 |  | 22 |  |
Number of Vessels Sold | 22 | 14 | 8 |  | 44 |  |
Number of Revalued Vessels Held for Sale |  | 24 | 38 |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  | $ 5,600 |  | $ 10,200 | $ 65,700 |  |
Impairment of Assets Transferred to Held for Sale | $ 0 | 49,900 |  |  |  |  |
Percentage Reduction in the Value of Vessels Due to the Effetcs of Completing Quick Sale | 10.00% |  |  |  | 10.00% |  |
Number of Total Vessels Sold |  |  |  |  | 47 |  |
Number of Active Vessels Sold |  |  |  |  | 3 |  |
Gain (Loss) on Sale of Assets and Asset Impairment Charges | $ 500 | $ 1,700 | $ 5,300 |  | $ 7,500 |  |
Marine Service and Vessel Supplies and Parts Inventory [Member] |  |  |  |  |  |  |
Inventory Write-down |  |  |  |  | $ 1,900 | $ 5,200 |

X
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- Definition The number of active vessels sold. + References No definition available. + Details
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- Definition The number of additional vessels to be sold. + References No definition available. + Details
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- Definition The number held for sale vessels that are revalued. + References No definition available. + Details
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- Definition Number of total vessels sold. + References No definition available. + Details
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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2611-110228 + Details
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