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Cover
Aug. 06, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 06, 2020
Entity File Number 001-37798
Entity Registrant Name SELECTA BIOSCIENCES, INC.
Entity Central Index Key 0001453687
Entity Tax Identification Number 26-1622110
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 65 Grove Street
Entity Address, City or Town Watertown
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02472
City Area Code 617
Local Phone Number 923-1400
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 SELB
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period true