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Convertible Preferred Stock, Common Stock and Stockholders' Deficit - Additional Information (Details) - USD ($)
 1 Months Ended 3 Months Ended
Feb. 05, 2024
Jan. 19, 2024
Mar. 20, 2023
Aug. 31, 2023
Oct. 31, 2022
Nov. 30, 2020
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Temporary Equity [Line Items]                  
Common stock, shares authorized             500,000,000   500,000,000
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             10,740,115   5,754,505
Fair value of warrant liability             $ (5,590,000) $ (1,146,000)  
Common stock par value             $ 0.0001   $ 0.0001
Expected term (years)             6 years 3 months 6 years 3 months  
Risk free interest rate             2.94% 3.56%  
Expected volatility             89.00% 75.00%  
Expected dividend yield             0.00% 0.00%  
General and administrative             $ 2,823,000 $ 15,849,000  
Preferred stock, par value             $ 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.              
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   $ 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                
Shelf Registration Statement                  
Temporary Equity [Line Items]                  
Issuance and sale of equity       $ 100,000,000          
ATM                  
Temporary Equity [Line Items]                  
Commissions paid             $ 11,000    
Remaining amount of available for sale             17,100,000    
Issuance and sale of equity             $ 17,300,000    
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             $ 0 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             $ 2,000 14,000  
Warrant term         10 years        
Directors, Employees or Consultants | 2024 Private Placement                  
Temporary Equity [Line Items]                  
Exercise price of warrants per share             $ 4.3915    
Maximum | Officers and Directors                  
Temporary Equity [Line Items]                  
Vesting period         48 months        
Minimum | Officers and Directors                  
Temporary Equity [Line Items]                  
Vesting period         12 months        
Common Stock                  
Temporary Equity [Line Items]                  
Stock issued             92,572    
Fair value of common stock   $ 8.5              
Common stock, shares issued     1,571,433            
Common Warrants | 2024 Private Placement                  
Temporary Equity [Line Items]                  
Exercise price of warrants per share             $ 3.827    
Preferred Stock                  
Temporary Equity [Line Items]                  
Fair value of warrant liability             $ 0 $ 796,000  
Pre Funded Warrants                  
Temporary Equity [Line Items]                  
Exercise price of warrants per share             $ 0.0001    
Warrant liability fair value             $ 500,000    
Pre Funded Warrants | 2024 Private Placement                  
Temporary Equity [Line Items]                  
Exercise price of warrants per share             $ 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    
Warrant liability fair value             $ 100,000    
Tranche A Common Warrants                  
Temporary Equity [Line Items]                  
Exercise price of warrants per share             $ 5.36    
Fair value of warrant liability             $ 2,700,000    
Warrant liability fair value             4,100,000    
Fair value of warrants             $ 1,400,000    
Expected term (years)             11 months 8 days    
Risk free interest rate             4.90%    
Expected volatility             100.00%    
Expected dividend yield             0.00%    
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    
Fair value of warrant liability             $ 2,900,000    
Warrant liability fair value             7,100,000    
Fair value of warrants             $ 4,200,000    
Expected term (years)             1 year 8 months 8 days    
Risk free interest rate             4.50%    
Expected volatility             100.00%    
Expected dividend yield             0.00%    
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    
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