v3.24.1.1.u2
Equity-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jan. 01, 2024
Sep. 30, 2017
Dec. 31, 2023
Dec. 31, 2022
Apr. 01, 2022
Mar. 24, 2022
Dec. 31, 2021
Sep. 22, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Compensation cost not yet recognized     $ 619          
Compensation expense recognition period     1 year 10 months 24 days          
Weighted-average grant date fair value (in dollars per share)     $ 1.26 $ 2.52        
Stock option, exercise price (in dollars per share)         $ 5.51      
Options outstanding (in shares)     12,115 222,833   233,224 331,420  
Share-based compensation expense     $ 1,348 $ 1,369        
Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares available for grant (in shares)     51,971          
Number of additional shares allowable annually under the plan (in shares)   10,000            
Percentage of outstanding shares allowable as annual increase   0.30%            
Employee Stock Option | Subsequent Event                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Increase in number of shares available for grant 10,000              
Employee Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Maximum ESPP contribution rate as a percentage of compensation   15.00%            
Maximum number of shares per employee in purchase period (in shares)   250            
Maximum contribution amount   $ 25            
ESPP purchase price as a percentage of market price   85.00%            
Offering period duration   6 months            
Issuance of common stock-ESPP (in shares)     0 1,851        
Restricted stock units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     4 years          
Number of shares issued for each vested restricted stock unit (in shares)     1          
Exicure, Inc. 2017 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized (in shares)               194,750
Number of shares available for grant (in shares)     454,636         72,330
Number of additional shares authorized, potential maximum additional shares (in shares)     153,333          
Number of additional shares authorized, percentage of common stock outstanding     5.00%          
Exicure, Inc. 2017 Equity Incentive Plan | Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Expiration period     10 years          
Exicure, Inc. 2017 Equity Incentive Plan | Employee Stock Option | Subsequent Event                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Increase in number of shares available for grant 153,333              
Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     48 months          
Exicure, Inc. 2017 Equity Incentive Plan | Subsequent Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     48 months          
Exicure OpCo 2015 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares available for grant (in shares)               122,793
Equity Incentive Plans, Option Repricing | Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense       $ 213        
Share-based Compensation Award, Tranche One | Performance Based Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     33.333%          
Share-based Compensation Award, Tranche One | Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     25.00%          
Share-based Compensation Award, Tranche Two | Initial Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     2.08%          
Share-based Compensation Award, Tranche Two | Subsequent Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     2.08%          
Share-based Compensation Award, Tranche Two | Performance Based Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     33.333%          
Share-Based Payment Arrangement, Tranche Three | Performance Based Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     33.333%          
Non-employee Director | Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     36 months          
Non-employee Director | Exicure, Inc. 2017 Equity Incentive Plan | Subsequent Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     12 months          
Non-employee Director | Exicure OpCo 2015 Equity Incentive Plan | Initial Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     2.77%          
Non-employee Director | Exicure OpCo 2015 Equity Incentive Plan | Subsequent Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting percentage     8.30%