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Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) Vechicle | Dec. 31, 2023 USD ($)
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Recognized income associated with revisions to allowance for doubtful accounts |  | $ 400,000
Allowance for doubtful accounts and credit losses | $ 200,000 | 200,000
Increase to beginning accumulated deficit | $ (26,632,000) | (41,373,000)
Litigation Settlement, Expense |  | 32,500,000
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 | $ 2,000,000 | 2,200,000
Gain on insurance recovery |  | 2,000,000
Gain on interruptions insurance recovery |  | 600,000
Insurance receivables |  | 2,000,000
Seventy-Vehicle Ferry |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Change in estimated margins | $ 1,100,000 | 1,300,000
Forty-Vehicle Ferry |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Change in estimated margins |  | 1,400,000
Number of vehicle ferry projects with rework and construction challenges. | Vechicle | 2 |
Revenue from potential recoveries | $ 0 |
Remaining Forty-Vehicle Ferry | Hurricane Ida |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Total charges related to deductibles |  | 500,000
Shipyard Division |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Reduction of estimated contract price for liquidated damages, amount |  | 1,400,000
Change in estimated margins | $ 1,100,000 | 2,700,000
Previous MPSV Litigation |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Litigation Settlement, Expense |  | 32,500,000
Previous MPSV Litigation | Shipyard Division |  |
Long Term Contracts Or Programs Disclosure [Line Items] |  |
Litigation Settlement, Expense |  | $ 32,500,000

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