Quarterly report [Sections 13 or 15(d)]

Note 8 - Debt (Details Textual)

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Note 8 - Debt (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 09, 2026
Mar. 31, 2026
Sep. 30, 2026
Dec. 31, 2025
May 20, 2022
Extinguishment of Debt, Gain (Loss), Net of Tax     $ (1,000)    
Debt Issuance Costs, Net     $ 6,000 $ 7,000  
Arabian Amines Company [Member]          
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage     50.00%    
Huntsman International LLC [Member]          
Extinguishment of Debt, Gain (Loss), Net of Tax     $ (1,000)    
The Revolving Credit Facility [Member] | Letter of Credit [Member]          
Long-Term Line of Credit     $ 3    
The Revolving Credit Facility [Member] | Term Secured Overnight Financing Rate (Term SOFR) [Member]          
Debt Instrument, Basis Spread on Variable Rate     1.75%    
The Revolving Credit Facility [Member] | EURIBOR Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate     1.75%    
The Revolving Credit Facility [Member] | Huntsman International LLC [Member]          
Line of Credit Facility, Maximum Borrowing Capacity $ 800,000   $ 800,000   $ 1,200,000
Line Of Credit Facility, Contingent Increase, Additional Borrowing Capacity $ 400,000        
Extinguishment of Debt, Gain (Loss), Net of Tax   $ (1,000)      
Debt Issuance Costs, Net     1,000    
US A/R Program [Member] | Huntsman International LLC [Member]          
Letters of Credit Outstanding, Amount     5,000    
Accounts Receivable Programs [Member] | Huntsman International LLC [Member] | Asset Pledged as Collateral [Member]          
Accounts Receivable, after Allowance for Credit Loss     $ 392,000 $ 281,000