Document And Entity Information
Jun. 07, 2021
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 07, 2021
Entity Registrant Name Equillium, Inc.
Entity Central Index Key 0001746466
Entity Emerging Growth Company true
Entity File Number 001-38692
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 82-1554746
Entity Address, Address Line One 2223 Avenida de la Playa
Entity Address, Address Line Two Suite 105
Entity Address, City or Town La Jolla
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92037
City Area Code 858
Local Phone Number 412-5302
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol EQ
Security Exchange Name NASDAQ