v3.26.1
Cover - $ / shares
6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-41934  
Entity Registrant Name FibroBiologics, Inc.  
Entity Central Index Key 0001958777  
Entity Tax Identification Number 86-3329066  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 9350 Kirby Drive  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77054  
City Area Code (281)  
Local Phone Number 671-5150  
Title of 12(b) Security Common Stock, $0.00001 par value  
Trading Symbol FBLG  
Security Exchange Name NASDAQ  
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 Common Stock, Shares Outstanding   6,658,193
Entity Listing, Par Value Per Share $ 0.00001