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Convertible Preferred Stock, Common Stock and Stockholders' Deficit - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Mar. 20, 2023
Aug. 31, 2023
Oct. 31, 2022
Nov. 30, 2020
Dec. 31, 2023
Dec. 31, 2022
Mar. 17, 2023
Temporary Equity [Line Items]              
Common stock, shares authorized         500,000,000 5,694,626  
Preferred stock, shares authorized         10,000,000 0  
Available for sale under Shelf Registration Statement         $ 99,700,000    
Net proceeds         $ 246,000    
Common stock, shares issued         5,754,505 84,165  
Fair value of warrant liability         $ (1,146,000) $ (3,784,000)  
Common stock par value         $ 0.0001 $ 0.0001  
Expected term (years)         6 years 3 months    
Expected volatility           82.00%  
Expected dividend yield         0.00% 0.00%  
General and administrative         $ 22,216,000 $ 5,843,000  
Preferred stock, par value         $ 0.0001 $ 0.0001  
Private Placement              
Temporary Equity [Line Items]              
Stock issued         20,700,000    
Net proceeds         $ 10,300,000    
Shelf Registration Statement              
Temporary Equity [Line Items]              
Issuance and sale of equity   $ 100,000,000          
ATM              
Temporary Equity [Line Items]              
Commissions paid         0    
Remaining amount of available for sale         4,400,000    
Issuance and sale of equity         $ 4,700,000    
Amended and Restated Certificate of Incorporation              
Temporary Equity [Line Items]              
Common stock, shares authorized         500,000,000    
Preferred stock, shares authorized         10,000,000    
Common stock par value         $ 0.0001    
Preferred stock, par value         $ 0.0001    
Chief Financial Officer              
Temporary Equity [Line Items]              
Exercise price of warrants per share       $ 0.19      
Stock and warrants issued during period shares common stock and warrants       400,000      
Warrant liability fair value       $ 120,000      
Expected term (years)       10 years      
Risk free interest rate       0.96%      
Expected volatility       80.00%      
Expected dividend yield       0.00%      
General and administrative           $ 50,000  
Vesting period       24 months      
Warrant term       10 years      
Officers and Directors              
Temporary Equity [Line Items]              
Exercise price of warrants per share     $ 10.42        
Stock and warrants issued during period shares common stock and warrants     496,970        
Warrant liability fair value     $ 125,000        
Expected term (years)     10 years        
Risk free interest rate     4.10%        
Expected volatility     82.00%        
Expected dividend yield     0.00%        
General and administrative         $ 90,000 $ 28,000  
Warrant term     10 years        
Graybug              
Temporary Equity [Line Items]              
Common stock par value         $ 0.0001   $ 0.0001
Maximum              
Temporary Equity [Line Items]              
Expected term (years)           6 years 3 months  
Risk free interest rate         3.56% 3.28%  
Expected volatility         76.00%    
Maximum | Officers and Directors              
Temporary Equity [Line Items]              
Vesting period     48 months        
Minimum              
Temporary Equity [Line Items]              
Expected term (years)           5 years  
Risk free interest rate         3.50% 2.80%  
Expected volatility         75.00%    
Minimum | Officers and Directors              
Temporary Equity [Line Items]              
Vesting period     12 months        
Common Stock              
Temporary Equity [Line Items]              
Stock issued         92,572    
Common stock, shares issued 1,571,433            
Conversion of preferred stock to common stock as a result of the Merger, shares         2,442,852    
Preferred Stock              
Temporary Equity [Line Items]              
Fair value of warrant liability         $ 795,000 $ 3,000,000  
Series C-2 Preferred              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 0.77    
Series D Convertible Preferred Stock              
Temporary Equity [Line Items]              
Preferred stock, shares authorized         0 88,875,077  
Preferred stock, par value         $ 0.001 $ 0.001  
Calcimedica Preferred Stock              
Temporary Equity [Line Items]              
Conversion of stock, shares converted 84,820,880            
Calcimedica Common Stock              
Temporary Equity [Line Items]              
Conversion of preferred stock to common stock as a result of the Merger, shares 2,442,852            
Series B Warrants              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 0.77    
Warrants issued         568,181    
Fair value of warrant liability         $ 21,000    
Warrant liability fair value           $ 45,000  
Warrant term         10 years    
Series C-2 Warrants              
Temporary Equity [Line Items]              
Fair value of warrant liability           900,000  
Warrants exercisable         2,786,567    
Warrant term         10 years    
Series D Warrants              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 0.8045    
Warrants issued         8,063,998    
Fair value of warrant liability           $ 600,000  
Warrant term         5 years    
Pre Merger CalciMedica | Private Placement              
Temporary Equity [Line Items]              
Conversion of stock, shares converted 20,706,997            
Post Merger CalciMedica | Private Placement              
Temporary Equity [Line Items]              
Conversion of Stock, Shares Issued 596,363            
Post Merger CalciMedica | Series C-2 Warrants              
Temporary Equity [Line Items]              
Number of warrants converted to common stock         80,254    
Prior to Merger Transaction | Series B Warrants              
Temporary Equity [Line Items]              
Number of warrants converted to common stock         568,181    
Prior to Merger Transaction | Series C-2 Warrants              
Temporary Equity [Line Items]              
Number of warrants converted to common stock         2,786,567    
Post Merger Transaction | Chief Financial Officer              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 6.6    
Number of warrants converted to common stock       11,520      
Post Merger Transaction | Officers and Directors              
Temporary Equity [Line Items]              
Exercise price of warrants per share     $ 10.42        
Number of warrants converted to common stock     14,313        
Post Merger Transaction | Series B Warrants              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 26.74    
Number of warrants converted to common stock         16,366    
Post Merger Transaction | Series C-2 Warrants              
Temporary Equity [Line Items]              
Fair value of warrant liability         $ 400,000    
Post Merger Transaction | Series D Warrants              
Temporary Equity [Line Items]              
Exercise price of warrants per share         $ 27.94    
Number of warrants converted to common stock         232,256    
Fair value of warrant liability         $ 200,000