Quarterly report [Sections 13 or 15(d)]

Organization and Summary of Significant Accounting Policies - Additional Information (Details)

v3.25.3
Organization and Summary of Significant Accounting Policies - Additional Information (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Segment
Sep. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Significant Accounting Policies [Line Items]            
Number of operating segments | Segment     2      
Number of corporate non-operating segments | Segment     1      
Goodwill $ 3,606,000   $ 3,606,000     $ 2,217,000
Gain (loss) on sale of assets     (8,000) $ 3,942,000    
Prepaid contract costs 0   0     0
Federal Income Tax Expense (Benefit), Continuing Operations 0 $ 0 0 0    
ENGlobal Business            
Significant Accounting Policies [Line Items]            
Goodwill         $ 1,389,000  
Charge for reserve against the full amount of the Alliance Payment     1,500,000      
ENGlobal Business | Corporate            
Significant Accounting Policies [Line Items]            
Integration and related costs 100,000          
Acquisition related integration and transaction costs     600,000      
Fabrication Division            
Significant Accounting Policies [Line Items]            
Gain (loss) on sale of assets       1,100,000    
Gain on sales of excess equipment       8,500,000    
Fabrication Division | Houma Facilities            
Significant Accounting Policies [Line Items]            
Gain (loss) on sale of assets       $ 2,900,000    
Automation Business Within Fabrication Division | ENGlobal Business            
Significant Accounting Policies [Line Items]            
Goodwill 1,400,000   1,400,000      
Services Division Excluding Government Business and Engineering Business | ENGlobal Business            
Significant Accounting Policies [Line Items]            
Goodwill $ 2,200,000   $ 2,200,000      
Minimum            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, useful life 3 years   3 years      
Maximum            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, useful life 25 years   25 years      
LC Facility            
Significant Accounting Policies [Line Items]            
Restricted cash $ 1,200,000   $ 1,200,000     $ 1,200,000
LC Facility | Balance Sheet Date Classified as Current            
Significant Accounting Policies [Line Items]            
Maturity date, description     maturity dates of twelve months or less from the balance sheet date classified as current      
LC Facility | Balance Sheet Date Classified as Noncurrent            
Significant Accounting Policies [Line Items]            
Maturity date, description     maturity dates of longer than twelve months from the balance sheet date classified as noncurrent