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Document and Entity Information
Nov. 10, 2021
Cover [Abstract]  
Security Exchange Name NASDAQ
Amendment Flag false
Entity Central Index Key 0001527599
Document Type 8-K
Document Period End Date Nov. 10, 2021
Entity Registrant Name SYNLOGIC, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-37566
Entity Tax Identification Number 26-1824804
Entity Address, Address Line One 301 Binney St.
Entity Address, Address Line Two Suite 402
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02142
City Area Code (617)
Local Phone Number 401-9975
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock
Trading Symbol SYBX
Entity Emerging Growth Company false