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Note 14 - Segment Information, Geographical Data and Major Customers (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 126,676 |  |  |  | 136,958 |  |  |  | 118,534 |
Middle East/Asia Pacific |  |  | 97,133 |  |  |  | 90,321 |  |  |  | 80,195 |
Europe/Mediterranean |  |  | 83,602 |  |  |  | 123,711 |  |  |  | 56,263 |
West Africa |  |  | 78,763 |  |  |  | 126,025 |  |  |  | 142,214 |
|  | $ | 386,174 |  |  |  | 477,015 |  |  |  | 397,206 |
Other operating revenues |  |  | 10,864 |  |  |  | 9,534 |  |  |  | 9,314 |
|  | $ | 397,038 |  |  |  | 486,549 |  |  |  | 406,520 |
Vessel operating profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 4,944 |  |  |  | (805 | ) |  |  | 8,860 |
Middle East/Asia Pacific |  |  | (5,935 | ) |  |  | (6,044 | ) |  |  | (4,417 | )
Europe/Mediterranean |  |  | (8,629 | ) |  |  | (1,289 | ) |  |  | (9,359 | )
West Africa |  |  | (27,508 | ) |  |  | 8,298 |  |  |  | 7,240 |
|  | $ | (37,128 | ) |  |  | 160 |  |  |  | 2,324 |
Other operating profit |  |  | 7,458 |  |  |  | 6,734 |  |  |  | 3,742 |
|  |  | (29,670 | ) |  |  | 6,894 |  |  |  | 6,066 |
Corporate expenses |  | $ | (35,633 | ) |  |  | (57,988 | ) |  |  | (42,972 | )
Gain on asset dispositions, net |  |  | 7,591 |  |  |  | 2,263 |  |  |  | 10,624 |
Affiliate credit loss impairment expense |  |  | (52,981 | ) |  |  | — |  |  |  | — |
Affiliate guarantee obligation |  |  | (2,000 | ) |  |  | — |  |  |  | — |
Impairment of due from affiliate |  |  | — |  |  |  | — |  |  |  | (20,083 | )
Asset impairments and other |  |  | (74,109 | ) |  |  | (37,773 | ) |  |  | (61,132 | )
Operating loss |  | $ | (186,802 | ) |  |  | (86,604 | ) |  |  | (107,497 | )
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 32,079 |  |  |  | 27,493 |  |  |  | 16,047 |
Middle East/Asia Pacific |  |  | 24,244 |  |  |  | 21,440 |  |  |  | 11,871 |
Europe/Mediterranean |  |  | 29,222 |  |  |  | 30,053 |  |  |  | 11,385 |
West Africa |  |  | 27,787 |  |  |  | 21,166 |  |  |  | 16,612 |
Corporate and other |  |  | 3,377 |  |  |  | 1,779 |  |  |  | 2,378 |
|  | $ | 116,709 |  |  |  | 101,931 |  |  |  | 58,293 |
Additions to properties and equipment: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 2,842 |  |  |  | 969 |  |  |  | 3,771 |
Middle East/Asia Pacific |  |  | 2,629 |  |  |  | 5,237 |  |  |  | 2,982 |
Europe/Mediterranean |  |  | 1,059 |  |  |  | 4,001 |  |  |  | 185 |
West Africa |  |  | 6,028 |  |  |  | 2,721 |  |  |  | 10,135 |
Corporate |  |  | 2,342 |  |  |  | 5,070 |  |  |  | 4,318 |
|  | $ | 14,900 |  |  |  | 17,998 |  |  |  | 21,391 |
Total assets: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 338,649 |  |  |  | 375,297 |  |  |  | 380,168 |
Middle East/Asia Pacific |  |  | 226,422 |  |  |  | 270,413 |  |  |  | 233,611 |
Europe/Mediterranean |  |  | 302,214 |  |  |  | 358,943 |  |  |  | 316,524 |
West Africa |  |  | 242,825 |  |  |  | 376,087 |  |  |  | 483,234 |
Investments in and advances to unconsolidated companies and other |  |  | — |  |  |  | — |  |  |  | 8,479 |
Corporate |  |  | 141,067 |  |  |  | 198,788 |  |  |  | 405,723 |
|  | $ | 1,251,177 |  |  |  | 1,579,528 |  |  |  | 1,827,739 |
Entity Wide Major Customer Amount [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Chevron Corporation |  |  | 14.3 | % |  |  | 13.0 | % |  |  | 15.0 | %
Saudi Aramco |  |  | 11.5 | % |  |  | * |  |  |  | * |

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