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Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 5,023 | $ 39,593 | $ 106,517 | $ 104,181
Long-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (19,122) | 16,912 | 35,612 | 40,183
Short-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 24,145 | 22,681 |  | 63,998
Operating Segments | Short-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue |  |  | 70,905 |
Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (230) | (254) | (925) | (431)
Eliminations | Long-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (20) | (1) | (30) | (7)
Eliminations | Short-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (210) | (253) | (895) | (424)
Services | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 22,976 | 22,569 | 69,033 | 65,413
Services | Operating Segments | Long-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 557 | 986 | 1,356 | 3,557
Services | Operating Segments | Short-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 22,419 | 21,583 | 67,677 | 61,856
Fabrication | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 14,979 | 15,429 | 69,382 | 31,885
Fabrication | Operating Segments | Long-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 13,043 | 14,078 | 65,259 | 29,319
Fabrication | Operating Segments | Short-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,936 | 1,351 | 4,123 | 2,566
Shipyard | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (32,702) | 1,849 | (30,973) | 7,314
Shipyard | Operating Segments | Long-Term Contract with Customer |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (32,702) | 1,849 | (30,973) | 7,314
Fixed-price and unit-rate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (19,980) | 14,244 | 8,126 | 36,515
Fixed-price and unit-rate | Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (20) | (1) | (30) | (7)
Fixed-price and unit-rate | Services | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 557 | 986 | 1,356 | 3,557
Fixed-price and unit-rate | Fabrication | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 12,185 | 11,410 | 37,773 | 25,651
Fixed-price and unit-rate | Shipyard | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (32,702) | 1,849 | (30,973) | 7,314
Time And Materials And Cost Reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 23,880 | 23,310 | 96,065 | 63,491
Time And Materials And Cost Reimbursable | Services | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 21,086 | 20,937 | 64,456 | 59,903
Time And Materials And Cost Reimbursable | Fabrication | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,794 | 2,373 | 31,609 | 3,588
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,123 | 2,039 | 2,326 | 4,175
Other | Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (210) | (253) | (895) | (424)
Other | Services | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,333 | 646 | $ 3,221 | 1,953
Other | Fabrication | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue |  | $ 1,646 |  | $ 2,646

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