Cover
Oct. 06, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 06, 2022
Entity File Number 001-38596
Entity Registrant Name REPLIMUNE GROUP, INC.
Entity Central Index Key 0001737953
Entity Tax Identification Number 82-2082553
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 500 Unicorn Park Drive
Entity Address, City or Town Woburn
Entity Address, State or Province MA
Entity Address, Postal Zip Code 01801
City Area Code 781
Local Phone Number 222-9600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol REPL
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period true