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Convertible Promissory Notes and Convertible Promissory Note Warrants - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2022
Apr. 30, 2022
Dec. 31, 2024
Dec. 31, 2023
Mar. 20, 2023
Nov. 20, 2022
Debt Instrument [Line Items]            
Public combination multiplied cash price paid per share $ 0.85          
Percentage of warrant coverage 40.00%          
Risk free interest rate     3.15%      
Expected volatility     97.00%      
Expected term (years)     6 years 3 days 6 years 3 months    
Minimum            
Debt Instrument [Line Items]            
Risk free interest rate       3.50%    
Expected volatility       75.00%    
Maximum            
Debt Instrument [Line Items]            
Risk free interest rate       3.56%    
Expected volatility       76.00%    
Common Stock            
Debt Instrument [Line Items]            
Percentage of warrant coverage           15.00%
Common Stock | Private CalciMedica            
Debt Instrument [Line Items]            
Number of convertible promissory note converted into common stock 20,487,104          
Common Stock | Graybug            
Debt Instrument [Line Items]            
Number of convertible promissory note converted into common stock 590,031          
Convertible promissory notes            
Debt Instrument [Line Items]            
Issuance or Sale of Convertible Promissory Notes   $ 5.0        
Gross proceeds of Convertible Promissory Notes $ 5.0 $ 3.5        
Debt Instrument, Interest Rate During Period 6.00%          
Convertible promissory notes | Common Stock            
Debt Instrument [Line Items]            
Exercise price of warrants per share   $ 0.01        
Convertible Promissory Note Warrants            
Debt Instrument [Line Items]            
Issuance or Sale of Convertible Promissory Notes $ 8.5          
Exercise price of warrants per share $ 0.01          
Addiitional convertible promissory notes and Convertible Promissory Note Warrants $ 3.5          
Convertible promissory note warrants convertible 5,308,047          
Convertible promissory note warrants common stock converted 5,308,047       152,871  
Exchange of stock for stock 152,875          
Expected Per Share         $ 5.5  
Convertible Promissory Note Warrants | Minimum            
Debt Instrument [Line Items]            
Risk free interest rate 3.02%          
Expected volatility 63.00%          
Expected term (years) 4 years 1 month 6 days          
Convertible Promissory Note Warrants | Maximum            
Debt Instrument [Line Items]            
Risk free interest rate 4.20%          
Expected volatility 67.00%          
Expected term (years) 4 years 7 months 6 days          
Convertible Promissory Note Warrants | Common Stock            
Debt Instrument [Line Items]            
Exercise price of warrants per share $ 0.01