v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Cover [Abstract]    
Document Type 10-K  
Amendment Flag false  
Document Annual Report true  
Document Transition Report false  
Document Period End Date Dec. 31, 2025  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Entity File Number 000-54457  
Entity Registrant Name FAST CASUAL CONCEPTS, INC.  
Entity Central Index Key 0001807689  
Entity Tax Identification Number 83-4100110  
Entity Incorporation, State or Country Code WY  
Entity Address, Address Line One 141 Amsterdam Rd.  
Entity Address, City or Town Grove City  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 16127  
City Area Code 727  
Local Phone Number 692-3348  
Title of 12(b) Security Common  
Trading Symbol FCCI  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Public Float   $ 13,115,410
Entity Common Stock, Shares Outstanding 26,112,754  
ICFR Auditor Attestation Flag false  
Document Financial Statement Error Correction [Flag] false  
Auditor Firm ID 6945  
Auditor Name M N Vijay Kumar  
Auditor Location Bengaluru, India