Annual report pursuant to Section 13 and 15(d)

Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details)

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Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Vechicle
Dec. 31, 2022
USD ($)
Vechicle
Jan. 01, 2023
USD ($)
Long Term Contracts Or Programs Disclosure [Line Items]        
Recognized income associated with revisions to allowance for doubtful accounts   $ 400    
Allowance for doubtful accounts and credit losses   200    
Increase to beginning accumulated deficit   $ (41,373) $ (16,339)  
Litigation Settlement, Expense $ 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. Our insurance coverages in effect at the time of the storm generally specified coverage amounts for each of our buildings (including contents) and major equipment.    
Insurance payments received   $ 2,200 13,100  
Gain on insurance recovery   2,000 7,500  
Gain on interruptions insurance recovery   600 3,700  
Insurance receivables   2,000    
Seventy-Vehicle Ferry        
Long Term Contracts Or Programs Disclosure [Line Items]        
Change in estimated margins   1,300 900  
Forty-Vehicle Ferry        
Long Term Contracts Or Programs Disclosure [Line Items]        
Change in estimated margins   $ 1,400 $ 1,100  
Number of vehicle ferry projects with rework and construction challenges. | Vechicle   2    
Number of vehicle ferry projects | Vechicle     2  
Remaining Forty-Vehicle Ferry | Hurricane Ida        
Long Term Contracts Or Programs Disclosure [Line Items]        
Total charges related to deductibles   $ 500 $ 200  
Shipyard        
Long Term Contracts Or Programs Disclosure [Line Items]        
Reduction of estimated contract price for liquidated damages, amount   1,400 1,400  
Change in estimated margins   2,700 $ 2,000  
ASU 2016-13        
Long Term Contracts Or Programs Disclosure [Line Items]        
Increase to beginning accumulated deficit       $ 600
MPSV Litigation        
Long Term Contracts Or Programs Disclosure [Line Items]        
Litigation Settlement, Expense   32,500    
MPSV Litigation | Shipyard        
Long Term Contracts Or Programs Disclosure [Line Items]        
Litigation Settlement, Expense   $ 32,500