Annual report [Section 13 and 15(d), not S-K Item 405]

Document and Entity Information

v3.25.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 27, 2025
Jun. 28, 2024
Document and Entity Information [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Entity File Number 001-39412    
Entity Registrant Name FATHOM HOLDINGS INC.    
Entity Incorporation, State or Country Code NC    
Entity Tax Identification Number 82-1518164    
Entity Address, Address Line One 2000 Regency Parkway Drive    
Entity Address, Adress 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    
Title of 12(b) Security Common Stock, No Par Value    
Trading Symbol FTHM    
Security Exchange Name NASDAQ    
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    
Entity Ex Transition Period true    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 22,281,129
Entity Common Stock, Shares Outstanding   27,196,999  
Entity Central Index Key 0001753162    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name Deloitte & Touche LLP    
Auditor Location Raleigh, North Carolina    
Auditor Firm ID 34