Current report

Cover

v3.25.3
Cover
Dec. 01, 2025
Nov. 28, 2025
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Dec. 01, 2025  
Entity Registrant Name FATHOM HOLDINGS INC.  
Entity Incorporation, State or Country Code NC  
Entity File Number 001-39412  
Entity Tax Identification Number 82-1518164  
Entity Address, Address Line One   2000 Regency Parkway Drive
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Cary  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 27518  
City Area Code 888  
Local Phone Number 455-6040  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock, No Par Value  
Trading Symbol FTHM  
Security Exchange Name NASDAQ  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Central Index Key 0001753162  
Amendment Flag false