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Document and Entity Information
Dec. 03, 2020
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001609809
Current Fiscal Year End Date --12-31
Document Type 8-K
Document Period End Date Dec. 03, 2020
Entity Registrant Name SERES THERAPEUTICS, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-37465
Entity Tax Identification Number 27-4326290
Entity Address, Address Line One 200 Sidney Street - 4th Floor
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02139
City Area Code (617)
Local Phone Number 945-9626
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value $0.001 per share
Trading Symbol MCRB
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period true