v3.22.2.2
Cover
Sep. 02, 2022
Cover [Abstract]  
Document Type 8-K
Entity Registrant Name Instil Bio, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-40215
Entity Tax Identification Number 83-2072195
Entity Address, Address Line One 3963 Maple Avenue, Suite 350
Entity Address, City or Town Dallas
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75219
City Area Code 972
Local Phone Number 499-3350
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.000001 par value
Trading Symbol TIL
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag false
Entity Central Index Key 0001789769
Document Period End Date Sep. 02, 2022