XML 17 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Nov. 10, 2025
Document Information [Line Items]    
Entity Central Index Key 0001337298  
Entity Registrant Name FUTUREFUEL CORP.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2025  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 0-52577  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-3340900  
Entity Address, Address Line One 2800 Gap Road  
Entity Address, City or Town Batesville  
Entity Address, State or Province AR  
Entity Address, Postal Zip Code 72501  
City Area Code 870  
Local Phone Number 698-5608  
Title of 12(b) Security Common Stock  
Trading Symbol FF  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   43,803,243