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Stock-based Compensation (Additional Information) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Nov. 30, 2023
Mar. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, reserved for future issuance 1,675,396 5,487,208    
Share-Based Compensation Arrangement by Share-Based Payment Award, Description In addition, the number of shares of common stock available for issuance under the 2023 Plan will be automatically increased on the first day of each calendar year during the ten-year term of the 2023 Plan, beginning with January 1, 2024 and ending with January 1, 2033, by the amount equal to 5% of the outstanding number of shares of the Company’s common stock on December 31 of the preceding calendar year or such lesser amount as determined by the Company’s board of directors.      
Number of Outstanding Option 1,323,151 461,100    
Weighted-average grant date fair value of stock options granted $ 23.49 $ 14.95    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value $ 0.3 $ 0.1    
Total unrecognized stock-based compensation expense relating to unvested stock options $ 10.1      
Unrecognized unvested stock options, weighted-average period 3 years 1 month 6 days      
Options vesting period 4 years      
Options expiration period 10 years      
Restricted Stock Units (RSUs) [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Fair value of restricted common stock $ 0.1 $ 0.5    
2019 Stock Incentive Plan Member        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, reserved for future issuance 600,977 683,156    
2019 Stock Incentive Plan        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, reserved for future issuance 110,285      
Common stock authorized under plan       747,752
2019 Incentive Award Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock authorized under plan 154,032      
2023 Stock Option and Incentive Plan        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, reserved for future issuance 889,922   885,028  
Common stock, shares available for future grants 255,694      
2019 Stock Incentive Plan        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Number of Outstanding Option 51,491      
2014 Stock Incentive Plan        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, reserved for future issuance 424,853      
Common stock, shares available for future grants 0      
Number of Outstanding Option 36,455      
Legacy Korro [Member] | 2019 Stock Incentive Plan        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Common stock, shares available for future grants 0 159,890