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Document And Entity Information
Nov. 12, 2024
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 12, 2024
Entity Registrant Name SYNDAX PHARMACEUTICALS, INC.
Entity Central Index Key 0001395937
Entity Emerging Growth Company false
Entity File Number 001-37708
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 32-0162505
Entity Address, Address Line One Building D
Entity Address, Address Line Two Floor 3
Entity Address, Address Line Three 35 Gatehouse Drive
Entity Address, City or Town Waltham
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02451
City Area Code (781)
Local Phone Number 419-1400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol SNDX
Security Exchange Name NASDAQ