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Document and Entity Information
Feb. 19, 2021
Oct. 07, 2020
Document and Entity Information [Abstract]    
Document Type   8-K
Document Period End Date Feb. 19, 2021  
Entity File Number   001-36177
Entity Registrant Name   GlycoMimetics, Inc.
Entity Incorporation, State or Country Code   DE
Entity Tax Identification Number   06-1686563
Entity Address, Address Line One   9708 Medical Center Drive
Entity Address, City or Town   Rockville
Entity Address, State or Province   MD
Entity Address, Postal Zip Code   20850
City Area Code   240
Local Phone Number   243-1201
Written Communications   false
Soliciting Material   false
Pre-commencement Tender Offer   false
Pre-commencement Issuer Tender Offer   false
Title of 12(b) Security   Common Stock, $0.001 par value
Trading Symbol   GLYC
Security Exchange Name   NASDAQ
Entity Emerging Growth Company   false
Entity Central Index Key   0001253689
Amendment Flag   false