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Segment Disclosures - Summarized Segment Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 57,290 | $ 37,993 |
Gross profit (loss) | 679 | (4,897) |
Operating income (loss) | (4,780) | (9,216) |
Total assets | 269,122 | 304,660 | $ 270,840
Depreciation and amortization expense | 2,749 | 4,700 |
Capital expenditures | 71 | 391 |
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 0 | 0 |
Gross profit (loss) | (385) | (260) |
Operating income (loss) | (2,523) | (1,739) |
Total assets | 318,137 | 349,917 |
Depreciation and amortization expense | 138 | 124 |
Capital expenditures | 0 | 17 |
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | (488) | (1,350) |
Gross profit (loss) | 0 | 0 |
Operating income (loss) | 0 | 0 |
Total assets | (415,072) | (427,142) |
Depreciation and amortization expense | 0 | 0 |
Capital expenditures | 0 | 0 |
Fabrication | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 17,270 | 10,209 |
Gross profit (loss) | (219) | (2,966) |
Operating income (loss) | (1,593) | (3,787) |
Total assets | 184,263 | 197,834 |
Depreciation and amortization expense | 1,149 | 3,135 |
Capital expenditures | 0 | 102 |
Shipyards | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 18,565 | 18,422 |
Gross profit (loss) | (1,023) | (1,704) |
Operating income (loss) | (1,819) | (3,057) |
Total assets | 76,150 | 88,489 |
Depreciation and amortization expense | 1,069 | 1,009 |
Capital expenditures | 6 | 272 |
Services | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 21,870 | 10,712 |
Gross profit (loss) | 2,614 | 33 |
Operating income (loss) | 1,880 | (633) |
Total assets | 105,632 | 95,562 |
Depreciation and amortization expense | 393 | 432 |
Capital expenditures | 65 | 0 |
EPC Division | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 73 | 0 |
Gross profit (loss) | (308) | 0 |
Operating income (loss) | (725) | 0 |
Total assets | 12 | 0 |
Depreciation and amortization expense | 0 | 0 |
Capital expenditures | $ 0 | $ 0 |

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