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Convertible Preferred Stock, Common Stock and Stockholders' Deficit - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 20, 2024
Nov. 01, 2024
Feb. 05, 2024
Jan. 19, 2024
Mar. 20, 2023
May 31, 2024
Aug. 31, 2023
Oct. 31, 2022
Nov. 30, 2020
Dec. 31, 2024
Dec. 31, 2023
Mar. 17, 2023
Temporary Equity [Line Items]                          
Common stock, shares authorized 500,000,000                   500,000,000 500,000,000  
Preferred stock, shares authorized 10,000,000                   10,000,000 10,000,000  
Available for sale under Shelf Registration Statement $ 89,500,000                   $ 89,500,000    
Net proceeds                     $ 49,000 $ 246,000  
Common stock, shares issued 13,481,917                   13,481,917 5,754,505  
Fair value of warrant liability                     $ (9,490,000) $ (1,146,000)  
Common stock par value $ 0.0001                   $ 0.0001 $ 0.0001  
Expected term (years)                     6 years 3 days 6 years 3 months  
Risk free interest rate                     3.15%    
Expected volatility                     97.00%    
Expected dividend yield                     0.00% 0.00%  
General and administrative                     $ 9,726,000 $ 22,216,000  
Preferred stock, par value 0.0001                   $ 0.0001 $ 0.0001  
Conversion of stock description         Each Placement Agent Warrant was accompanied by one Tranche A Common Warrant to purchase one half of a share of common stock and one Tranche B Warrant to purchase one half of a share of common stock, for an aggregate of 75,746 Common Warrants.                
Proceeds from issuance Initial Public Offering     $ 10,200,000                    
2023 Private Placement                          
Temporary Equity [Line Items]                          
Gross proceeds from the private placement                     $ 20,400,000    
Stock issued                     20,700,000    
Net proceeds                     $ 10,300,000    
2024 Private Placement                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 3.827       $ 0.0001           $ 3.827    
Number of warrants converted to common stock       7,839 67,908                
Gross proceeds from the private placement       $ 20,400,000                  
Net proceeds from issuance of private placement       19,000,000                  
Conversion of stock, shares converted         75,746                
Sale of stock, shares         4,985,610                
Commissions paid       $ 1,400,000                  
Public Offering                          
Temporary Equity [Line Items]                          
Shares issued, price per share     $ 3.75                    
Underwriters option period     30 days                    
Shelf Registration Statement                          
Temporary Equity [Line Items]                          
Issuance and sale of equity               $ 100,000,000          
ATM                          
Temporary Equity [Line Items]                          
Sale of stock, shares                     8,950    
Commissions paid                     $ 13,000    
Remaining amount of available for sale                     4,500,000    
Issuance and sale of equity                     $ 17,300,000    
Shares issued, price per share     $ 3.75                    
Proceeds from follow on offering     $ 10,200,000                    
Amended and Restated Certificate of Incorporation                          
Temporary Equity [Line Items]                          
Common stock, shares authorized 500,000,000                   500,000,000    
Preferred stock, shares authorized 10,000,000                   10,000,000    
Common stock par value $ 0.0001                   $ 0.0001    
Preferred stock, par value 0.0001                   $ 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             10,000     400,000      
Warrant liability fair value             $ 20,000     $ 120,000      
Expected term (years)                   10 years 12 months    
Risk free interest rate                   0.96% 4.42%    
Expected volatility                   80.00% 89.00%    
Expected dividend yield                   0.00% 0.00%    
General and administrative                     $ 13,000    
Vesting period                   24 months      
Warrant term                   10 years      
Officers and Directors                          
Temporary Equity [Line Items]                          
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                     $ 6,000 $ 90,000  
Warrant term                 10 years        
Directors, Employees Or Consultants | 2024 Private Placement                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 4.3915                   $ 4.3915    
Graybug                          
Temporary Equity [Line Items]                          
Common stock par value                       $ 0.0001 $ 0.0001
Maximum                          
Temporary Equity [Line Items]                          
Risk free interest rate                       3.56%  
Expected volatility                       76.00%  
Maximum | Officers and Directors                          
Temporary Equity [Line Items]                          
Vesting period                 48 months        
Minimum                          
Temporary Equity [Line Items]                          
Risk free interest rate                       3.50%  
Expected volatility                       75.00%  
Minimum | Officers and Directors                          
Temporary Equity [Line Items]                          
Vesting period                 12 months        
Common Stock                          
Temporary Equity [Line Items]                          
Stock issued 101,522                   8,950 92,572  
Net proceeds                     $ 319,000    
Fair value of common stock         $ 8,500,000                
Common stock, shares issued           1,571,433              
Common Stock | Public Offering                          
Temporary Equity [Line Items]                          
Stock issued     2,720,000                    
Maximum number of additional shares issued     408,000                    
Common Stock | ATM                          
Temporary Equity [Line Items]                          
Stock issued     2,720,000                    
Sale of stock, shares   4,450,000                      
Common Warrants | 2024 Private Placement                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 3.827                   $ 3.827    
Preferred Stock                          
Temporary Equity [Line Items]                          
Fair value of warrant liability                     $ 0 $ 795,000  
Pre Funded Warrants                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 0.0001                   $ 0.0001    
Warrant liability fair value $ 500,000                   $ 500,000    
Pre Funded Warrants | 2024 Private Placement                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 3.8269                   $ 3.8269    
Number of warrants converted to common stock         306,506                
Decrease in warrant exercise price                     0.0001    
Placement Agent Warrants                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 0.0001                   $ 0.0001    
Warrant liability fair value $ 100,000                   $ 100,000    
Tranche A Common Warrants                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 5.36                   $ 5.36    
Fair value of warrant liability                     $ 4,100,000    
Warrants expiration date Jul. 27, 2024                   Jul. 27, 2024    
Warrant liability fair value $ 4,100,000                   $ 4,100,000    
Expected term (years)                     11 months 8 days    
Risk free interest rate                     4.90%    
Expected volatility                     100.00%    
Expected dividend yield                     0.00%    
Fair value of warrants $ 0                   $ 0    
Tranche A Common Warrants | 2024 Private Placement                          
Temporary Equity [Line Items]                          
Number of warrants converted to common stock         2,646,058                
Tranche B Common Warrants                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 7.15                   $ 7.15    
Fair value of warrant liability                     $ 300,000 $ 3,700,000  
Warrant liability fair value $ 7,100,000                   $ 7,100,000    
Expected term (years)                     1 year 8 months 8 days    
Risk free interest rate                     4.50%    
Expected volatility                     100.00%    
Expected dividend yield                     0.00%    
Fair value of warrants $ 3,400,000                   $ 3,400,000    
Tranche A and Tranche B Common Warrants                          
Temporary Equity [Line Items]                          
Sale of stock, shares         2,646,058                
Pre Merger CalciMedica | 2023 Private Placement                          
Temporary Equity [Line Items]                          
Conversion of stock, shares converted           20,706,997              
Pre Merger CalciMedica | Calcimedica Preferred Stock | 2023 Private Placement                          
Temporary Equity [Line Items]                          
Conversion of stock, shares converted           84,820,880              
Post Merger CalciMedica | 2023 Private Placement                          
Temporary Equity [Line Items]                          
Conversion of Stock, Shares Issued           596,363              
Post Merger CalciMedica | Calcimedica Preferred Stock | 2023 Private Placement                          
Temporary Equity [Line Items]                          
Conversion of Stock, Shares Issued           84,820,880              
Post Merger CalciMedica | Calcimedica Common Stock | 2023 Private Placement                          
Temporary Equity [Line Items]                          
Conversion of Stock, Shares Issued           2,442,852              
Post Merger Transaction | Chief Financial Officer                          
Temporary Equity [Line Items]                          
Exercise price of warrants per share $ 6.6                   $ 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