Segment Disclosures - Summarized Segment Financial Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
|
| Segment Reporting Information [Line Items] | |||||
| Revenue | $ 75,802 | $ 49,712 | $ 223,863 | $ 161,016 | |
| Revenues | 49,712 | 223,863 | 161,016 | ||
| Gross profit (loss) | (2,685) | (3,212) | (3,730) | (3,232) | |
| Operating income (loss) | (6,928) | (10,744) | (15,594) | (15,111) | |
| Depreciation and amortization expense | 2,290 | 2,480 | 7,264 | 7,788 | |
| Capital expenditures | 631 | 1,471 | 1,990 | 2,362 | |
| Total assets | 277,165 | 262,964 | 277,165 | 262,964 | $ 258,290 |
| Corporate | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | (615) | ||||
| Revenues | (779) | (5,421) | (2,550) | ||
| Gross profit (loss) | (65) | (402) | (347) | (1,171) | |
| Operating income (loss) | (2,324) | (2,495) | (6,788) | (7,952) | |
| Depreciation and amortization expense | 96 | 42 | 319 | 258 | |
| Capital expenditures | 0 | 1 | 0 | 70 | |
| Total assets | 76,334 | 58,595 | 76,334 | 58,595 | |
| Fabrication | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 19,474 | 3,382 | 54,520 | 30,197 | |
| Fabrication | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 19,474 | ||||
| Revenues | 3,382 | 54,520 | 30,197 | ||
| Gross profit (loss) | (428) | (4,237) | (1,877) | (5,888) | |
| Operating income (loss) | (848) | (8,277) | (3,599) | (6,572) | |
| Depreciation and amortization expense | 840 | 1,023 | 2,698 | 3,219 | |
| Capital expenditures | 137 | 142 | 282 | 142 | |
| Total assets | 63,098 | 85,780 | 63,098 | 85,780 | |
| Shipyard | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 39,436 | 24,492 | 113,590 | 66,677 | |
| Shipyard | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 39,436 | ||||
| Revenues | 24,492 | 113,590 | 66,677 | ||
| Gross profit (loss) | (2,402) | (1,764) | (5,594) | (5,563) | |
| Operating income (loss) | (3,349) | (2,454) | (7,817) | (7,810) | |
| Depreciation and amortization expense | 992 | 1,050 | 3,148 | 3,170 | |
| Capital expenditures | 326 | 783 | 1,060 | 1,442 | |
| Total assets | 109,129 | 86,162 | 109,129 | 86,162 | |
| Services | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 17,507 | 22,617 | 61,174 | 66,692 | |
| Services | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenue | 17,507 | ||||
| Revenues | 22,617 | 61,174 | 66,692 | ||
| Gross profit (loss) | 210 | 3,191 | 4,088 | 9,390 | |
| Operating income (loss) | (407) | 2,482 | 2,610 | 7,223 | |
| Depreciation and amortization expense | 362 | 365 | 1,099 | 1,141 | |
| Capital expenditures | 168 | 545 | 648 | 708 | |
| Total assets | $ 28,604 | $ 32,427 | $ 28,604 | $ 32,427 | |