v3.25.2
Document And Entity Information
Jun. 17, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 17, 2025
Entity Registrant Name HORIZON KINETICS HOLDING CORPORATION
Entity Central Index Key 0000088000
Entity Emerging Growth Company false
Entity File Number 001-13458
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 84-0920811
Entity Address, Address Line One 470 Park Ave S.
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10016
City Area Code (646)
Local Phone Number 291-2300
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security None
No Trading Symbol Flag true
Security Exchange Name NONE