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Common Stock Warrants - Additional Information (Details) - $ / shares
 1 Months Ended 12 Months Ended
Feb. 26, 2024
Jan. 31, 2025
Dec. 31, 2024
Aug. 23, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Replacement of warrants       1,003,191
Purchase price per warrant $ 4.779      
Pre-Funded Warrants        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Warrants outstanding     1,611,215  
Purchase price per warrant 4.779      
Apexigen, Inc.        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Replacement of warrants       5,815,613
Maximum [Member] | Pre-Funded Warrants        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Warrants exercise price per share $ 0.001      
Warrant One        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Warrants outstanding     344,259  
Warrants exercise price per share     $ 8.12  
Warrants outstanding expire date     Jul. 30, 2028  
Warrant Two        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Warrants outstanding     17,212  
Warrants exercise price per share     $ 10.14  
Warrants outstanding expire date     Jul. 30, 2028  
Warrants redemption exercise price per share     $ 0.01  
Sale price per share     $ 104.35  
Consecutive trading days     20 days  
Warrant Two | Minimum [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Redemption notice period     30 days  
Warrant Two | Maximum [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Trading days     30 days  
Warrant Three        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Warrants outstanding     641,720  
Warrants exercise price per share     $ 66.67  
Warrants outstanding expire date     Jul. 29, 2027  
Common Stock | Pre-Funded Warrants        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Pre-Funded Warrants issued to purchase aggregate number of shares of common stock 1,611,215      
Common Stock | Pre-Funded Warrants | Subsequent Event        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Pre-Funded Warrants issued to purchase aggregate number of shares of common stock   1,611,215