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Stock-based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Mar. 20, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock shares reserved for future issuance 2,475,016    
Common stock, shares issued 5,754,505 84,165  
Number of options, forfeited 96,594    
Stock-based compensation expense $ 12,039 $ 1,401  
Acceleration of stock awards 10,500    
Research and Development      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense 2,449 499  
General and Administrative      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense 9,590 $ 902  
Graybug      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Acceleration of stock awards 10,500    
Graybug | Research and Development      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense 1,900    
Graybug | General and Administrative      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense $ 8,600    
2006 Equity Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expiration period 10 years    
Award vesting rights, percentage 25.00%    
Award vesting period 1 year    
Vesting period 36 months    
2023 Equity Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock shares reserved for future issuance 394,309   1,000,000
Percentage of aggregate number of shares of common stock outstanding on last day of preceding year added to plan 5.00%    
Number of options, forfeited 96,594    
Shares available for grant (shares) 394,309    
2023 Employee Stock Purchase Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock shares reserved for future issuance 65,000    
Weighted averagefair value options, granted $ 2.34 $ 12.85  
Total fair value of shares vested $ 11,900 $ 1,700  
Common stock, shares issued 195,000    
Exercise of common stock options, Shares 0    
Percentage of aggregate number of shares of common stock outstanding on last day of preceding year added to plan 1.00%    
Stock Issued 0    
Total unrecognized stock-based compensation expenses related to outstanding unvested stock awards $ 2,300    
Total unrecognized stock-based compensation expenses related to outstanding unvested stock awards weighted-average term of recognition 2 years 4 months 24 days