v3.24.1.1.u2
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
May 31, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-39011    
Entity Registrant Name EXICURE, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 81-5333008    
Entity Address, Address Line One 2430 N. Halsted St.    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60614    
City Area Code 847    
Local Phone Number 673-1700    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol XCUR    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Interactive Data Current No    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 5.8
Entity Common Stock, Shares Outstanding (in shares)   8,651,148  
Documents Incorporated by Reference
None.
    
Entity Central Index Key 0001698530    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false