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Note 13 - Segment and Geographic Distribution of Operations - Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Revenues of Angolan operations (in thousands) | $ 83,504 | $ 116,368
Gross Profit | (16,848) | (3,615)
Corporate expenses | (109,805) | (134,901)
Long-lived asset impairments | 0 | (10,207)
Gain (loss) on asset dispositions, net | (1,948) | 5,331
Operating loss | (26,301) | (18,533)
Depreciation and amortization | 29,727 | 27,107
Property Plant And Equipment Additions | 1,196 | 2,449
Product and Service, Other [Member] |  |
Revenues of Angolan operations (in thousands) | 2,511 | 4,394
Operating Segments [Member] |  |
Depreciation and amortization | 29,727 | 27,107
Operating Segments [Member] | Americas One [Member] |  |
Gross Profit | (1,651) | (1,164)
Depreciation and amortization | 8,007 | 7,496
Operating Segments [Member] | Middle East and Asia Pacific [Member] |  |
Gross Profit | (1,853) | (856)
Depreciation and amortization | 6,880 | 5,527
Property Plant And Equipment Additions | 8 | 680
Operating Segments [Member] | Europe and Mediterranean [Member] |  |
Gross Profit | (8,021) | 1,547
Depreciation and amortization | 7,484 | 6,819
Property Plant And Equipment Additions | 306 | 440
Operating Segments [Member] | West Africa [Member] |  |
Gross Profit | (6,767) | (4,863)
Depreciation and amortization | 6,570 | 6,404
Property Plant And Equipment Additions | 495 | 751
Operating Segments [Member] | Service [Member] |  |
Revenues of Angolan operations (in thousands) | 83,504 | 116,368
Operating Segments [Member] | Service [Member] | Americas One [Member] |  |
Revenues of Angolan operations (in thousands) | 26,224 | 31,859
Operating Segments [Member] | Service [Member] | Middle East and Asia Pacific [Member] |  |
Revenues of Angolan operations (in thousands) | 24,414 | 24,828
Operating Segments [Member] | Service [Member] | Europe and Mediterranean [Member] |  |
Revenues of Angolan operations (in thousands) | 14,749 | 29,491
Operating Segments [Member] | Service [Member] | West Africa [Member] |  |
Revenues of Angolan operations (in thousands) | 15,606 | 25,796
Operating Segments [Member] | Product and Service, Other [Member] |  |
Revenues of Angolan operations (in thousands) | 2,511 | 4,394
Gross Profit | 1,444 | 1,721
Corporate, Non-Segment [Member] |  |
Corporate expenses | (7,505) | (10,042)
Depreciation and amortization | 786 | 861
Property Plant And Equipment Additions | $ 387 | $ 578

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