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Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Recognized income associated with revisions to allowance for doubtful accounts | $ 200 |  | $ 400 |
Allowance for doubtful accounts and credit losses |  | $ 200 |  | $ 200
Increase to beginning accumulated deficit |  | $ (30,927) |  | (41,373)
Litigation Settlement, Expense | 32,500 |  | 32,500 |
Hurricane Ida |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Impact of Hurricane Ida, description |  | During 2021, our operations were impacted by Hurricane Ida, which made landfall near Houma, Louisiana as a high-end Category 4 hurricane, causing debris and damage to our buildings and equipment at our Houma Facilities. |  |
Insurance payments received |  | $ 2,000 | 2,200 |
Gain on interruptions insurance recovery |  |  | 600 |
Gain on insurance recovery | 300 |  | 500 |
Insurance receivables |  |  |  | 2,000
Forty-Vehicle Ferry |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Change in estimated margins | 300 |  | 500 |
Seventy-Vehicle Ferry |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Change in estimated margins | 1,200 |  | 1,800 |
Remaining Forty-Vehicle Ferry | Hurricane Ida |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Total charges related to deductibles | 100 |  | 400 |
Shipyard Division |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Reduction of estimated contract price for liquidated damages, amount |  |  |  | $ 1,400
Change in estimated margins | 1,500 |  | 2,300 |
Fabrication Division |  |  |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |  |  |
Change in estimated margins | $ 700 |  | $ 700 |

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