v3.26.1
Document and Entity Information
Jul. 21, 2026
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001829802
Document Type 8-K
Document Period End Date Jul. 21, 2026
Entity Registrant Name Faeth Therapeutics, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-39980
Entity Tax Identification Number 83-1863385
Entity Address, Address Line One 701 Tillery Street #12 #1010
Entity Address, City or Town Austin
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78702
City Area Code (512)
Local Phone Number 200-2982
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock
Trading Symbol FTH
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false