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Quarterly Operating Results (Unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 60,231 | $ 49,712 | $ 54,014 | $ 57,290 | $ 37,277 | $ 49,884 | $ 45,868 | $ 37,993 | $ 221,247 | $ 171,022 | $ 286,326
Gross profit (loss) | (3,964) | (3,212) | (699) | 679 | (25,914) | (494) | (11,620) | (4,897) | (7,196) | (42,925) | 24,853
Net income (loss) | $ (4,682) | $ (10,949) | $ 549 | $ (5,296) | $ (24,279) | $ (3,110) | $ (10,923) | $ (6,454) | $ (20,378) | $ (44,766) | $ 3,515
Basic and diluted EPS (in dollars per share) | $ (0.31) | $ (0.73) | $ 0.04 | $ (0.36) | $ (1.63) | $ (0.21) | $ (0.73) | $ (0.45) | $ (1.36) | $ (3.02) | $ 0.24
Increase in operating loss due to change in estimates |  |  |  |  |  |  |  |  | $ 9,100 |  | $ 1,800
Proceeds collection of receivables | $ 2,800 |  |  |  |  |  |  |  |  |  |
Gain on sale | 4,100 |  |  |  |  |  |  |  | (268) | $ 35 | $ 757
Loss related to cost overruns and re-work |  |  |  |  | $ 34,500 |  |  |  |  | 34,500 |
Impairment charges related to inventory and assets | 3,000 |  |  |  |  |  |  |  |  |  |
Shipyard |  |  |  |  |  |  |  |  |  |  |
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Increase in operating loss due to change in estimates | $ 5,800 |  |  |  |  |  |  |  | $ 6,700 | $ 34,500 |

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