Quarterly report [Sections 13 or 15(d)]

Long Term Debt (Details Narrative)

v3.26.3
Long Term Debt (Details Narrative) - USD ($)
1 Months Ended 9 Months Ended
Aug. 10, 2026
May 08, 2020
Apr. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
Apr. 15, 2026
Dec. 31, 2025
PromissoryNoteLineitems [Line Items]              
Letters of credit outstanding, amount       $ 3,420,000      
Debt instrument, interest rate description       Pursuant to the PNC Loan Agreement, payments of annual interest rates are as follows: (i) interest due on the Revolving Credit is at prime (7.0% as of September 30, 2026) plus 2% or SOFR (as defined in the PNC Loan Agreement) plus 3.00% plus a SOFR Adjustment applicable for an interest period selected by the Company; (ii) interest due on the Capital Loan is at prime plus 2.50% or SOFR plus 3.50% plus a SOFR Adjustment applicable for an interest period selected by the Company; and (iii) interest due on the Term Loan is at prime plus 3.00% or SOFR plus 4.00% plus a SOFR Adjustment applicable for an interest period selected by the Company. SOFR Adjustment rates of 0.10% and 0.15% are applicable for a one-month interest period and three-month period, respectively, that may be selected by the Company      
Purchase price of property       $ 5,184,000 $ 2,634,000    
Cash paid       14,743,000     $ 11,768,000
Perma-Fix Northwest Richland, Inc [Member]              
PromissoryNoteLineitems [Line Items]              
Variable interest rates     3.00%        
Interest rate     3.00%        
Interest rate increase decrease     1.00%        
Perma-Fix Northwest Richland, Inc [Member] | US Treasury Securities [Member]              
PromissoryNoteLineitems [Line Items]              
Interest rate     4.00%        
Maximum [Member] | Perma-Fix Northwest Richland, Inc [Member] | US Treasury Securities [Member]              
PromissoryNoteLineitems [Line Items]              
Interest rate     20.50%        
Lender [Member]              
PromissoryNoteLineitems [Line Items]              
Reduction in borrowing availability       750,000      
P N C Loan Agreement [Member] | Minimum [Member]              
PromissoryNoteLineitems [Line Items]              
Liquidity under credit facility       5,000,000      
Purchase and Sales Agreement [Member]              
PromissoryNoteLineitems [Line Items]              
Maturity date     Apr. 15, 2036        
Purchase price of property     $ 350,000        
Cash paid           $ 87,500  
Promissory note           $ 262,500  
Monthly payments     $ 3,100        
Annual fixed interest rate     7.50%        
Revolving Credit Facility [Member]              
PromissoryNoteLineitems [Line Items]              
Annual capital expenditure limitation amount $ 6,000,000            
Liquidity under credit facility       19,864,000     18,126,000
Line of credit current borrowing capacity       $ 5,533,000     $ 6,597,000
Revolving Credit Facility [Member] | Minimum [Member]              
PromissoryNoteLineitems [Line Items]              
Liquidity under credit facility $ 5,000,000            
Revolving Credit Facility [Member] | Loan Agreement [Member] | PNC Bank [Member]              
PromissoryNoteLineitems [Line Items]              
Line of credit facility, maximum borrowing capacity   $ 12,500,000          
Maturity date May 15, 2030 May 15, 2027          
Payment description The Company agreed to pay PNC 0.25% of the total financing in the event the Company pays off its obligations on or before May 15, 2027            
Lender fee paid $ 12,500