Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment and Leased Facilities and Equipment - Additional Information (Details)

v3.22.1
Property, Plant and Equipment and Leased Facilities and Equipment - Additional Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
ft²
a
Renewal_options
Dec. 31, 2020
USD ($)
Property, Plant and Equipment [Line Items]    
Depreciation expense for continuing operations $ 4.1 $ 5.0
Operating lease, right-of-use asset $ 0.9  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other noncurrent assets  
Current lease liability $ 0.6  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Total current liabilities  
Long-term lease liability $ 1.4  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other noncurrent liabilities  
Lease agreement expenses $ 1.0 0.9
Operating lease payments $ 1.5 $ 1.4
Operating lease, term of contract 3 years 1 month 6 days  
Operating lease, weighted-average discount rate (percentage) 6.70%  
Houston, Texas    
Property, Plant and Equipment [Line Items]    
Office space area of leased premises (in sqft or acres) | ft² 17,000  
Jennings, Louisiana    
Property, Plant and Equipment [Line Items]    
Office space area of leased premises (in sqft or acres) | a 180  
Lease description During the fourth quarter 2020, we closed our Jennings Facility and do not intend to exercise our renewal options  
Jennings, Louisiana | Prospect Shipyard    
Property, Plant and Equipment [Line Items]    
Lease renewal options | Renewal_options 2  
Lease renewal term 10 years  
Lake Charles, Louisiana    
Property, Plant and Equipment [Line Items]    
Office space area of leased premises (in sqft or acres) | a 10  
Lease description During the fourth quarter 2020, we closed our Lake Charles Facility and do not intend to exercise our renewal options  
Lake Charles, Louisiana | Prospect Shipyard    
Property, Plant and Equipment [Line Items]    
Lease renewal options | Renewal_options 3  
Lease renewal term 5 years