Quarterly report [Sections 13 or 15(d)]

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

v3.25.2
Organization and Summary of Significant Accounting Policies - Additional Information (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Segment
Jun. 30, 2024
USD ($)
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
Provision for bad debts and credit losses 1,700,000   1,700,000   200,000
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   1,389,000    
Transaction and related costs 300,000   500,000    
Charge for reserve against the full amount of the Alliance Payment 1,500,000   1,500,000    
ENGlobal Business | Corporate          
Significant Accounting Policies [Line Items]          
Transaction and related costs 300,000   500,000    
Fabrication Division          
Significant Accounting Policies [Line Items]          
Gain (loss) on sale of assets   $ 700,000   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