Quarterly report pursuant to Section 13 or 15(d)

Shipyard Transaction and Discontinued Operations - Additional Information (Details)

v3.22.1
Shipyard Transaction and Discontinued Operations - Additional Information (Details)
 3 Months Ended 12 Months Ended
Apr. 19, 2021
USD ($)
Vechicle
vessel
Ship_project
drydock
Mar. 31, 2022
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Asset impairments       $ 22,750,000  
Liabilities   $ 30,812,000     $ 31,365,000
Shipyard Transaction          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Number of research vessels projects | vessel 3        
Number of divested shipyard contracts | Ship_project 5        
Number of drydocks | drydock 4        
Number of drydocks previously supported for shipyard division operations | drydock 3        
Number of MPSV projects | vessel 2        
Asset impairments       22,800,000  
Transaction costs       $ 700,000  
Material operating results of discontinued operations   0      
Material assets of discontinued operations   0     0
Material liabilities of discontinued operations   0     0
Shipyard Transaction | Retained Shipyard Contracts And Other Shipyard Division Liabilities          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Liabilities   $ 6,200,000     8,700,000
Shipyard Transaction | Forty-Vehicle Ferry          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Number of vehicle ferry projects | Vechicle 2        
Bollinger | Shipyard Transaction          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Transaction price $ 28,600,000        
Net of estimated transaction and other costs $ 26,100,000        
Transaction price on closing date         27,700,000
Deferred transaction price         $ 900,000
Estimate change in working capital for divested shipyard contracts     $ 7,800,000