Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 42,881	$ 62,168
Long-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	16,616	40,219
Short-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	26,265	21,949
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(200)	(428)
Eliminations | Long-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue		(8)
Eliminations | Short-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	(200)	(420)
Services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	25,534	21,587
Services | Operating Segments | Long-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	249	172
Services | Operating Segments | Short-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	25,285	21,415
Fabrication | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	17,138	39,662
Fabrication | Operating Segments | Long-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	15,958	38,708
Fabrication | Operating Segments | Short-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	1,180	954
Shipyard Division | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	409	1,347
Shipyard Division | Operating Segments | Long-Term Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	409	1,347
Fixed-price and unit-rate
Disaggregation of Revenue [Line Items]
Revenue	16,533	13,700
Fixed-price and unit-rate | Eliminations
Disaggregation of Revenue [Line Items]
Revenue		(8)
Fixed-price and unit-rate | Services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	249	172
Fixed-price and unit-rate | Fabrication | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	15,875	12,189
Fixed-price and unit-rate | Shipyard Division | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	409	1,347
Time And Materials And Cost Reimbursable
Disaggregation of Revenue [Line Items]
Revenue	25,990	48,015
Time And Materials And Cost Reimbursable | Services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	24,727	20,542
Time And Materials And Cost Reimbursable | Fabrication | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,263	27,473
Other
Disaggregation of Revenue [Line Items]
Revenue	358	453
Other | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(200)	(420)
Other | Services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 558	$ 873