v3.26.1
Shareholder’s Equity (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2025
May 29, 2025
Jan. 01, 2022
Aug. 20, 2021
Aug. 19, 2021
Jul. 20, 2021
Jun. 09, 2021
May 31, 2021
Dec. 31, 2025
Dec. 31, 2024
Jun. 30, 2025
Shareholder’s Equity [Line Items]                      
Ordinary shares, shares authorized [1] 100,000,000,000               100,000,000,000   100,000,000,000
Ordinary shares, par value (in Dollars per share) [1] $ 0.00001               $ 0.00001   $ 0.00001
Ordinary shares, shares issued [1] 494,488,908               494,488,908   494,488,908
Ordinary shares, shares outstanding [1] 494,488,908               494,488,908   494,488,908
Aggregate number of ordinary shares                 1,235,076    
Percentage of outstanding number of ordinary shares                 2.00%    
Granted issuance of option 592,230                    
Exercise price per share (in Dollars per share)                 $ 0.26 $ 0.26  
Vest on each anniversary period 4 years   4 years       4 years       4 years
Over vesting year             10 years       10 years
Vested term     10 years                
Option exercisable per share (in Dollars per share) $ 17.4                    
Terminated period                 10 years    
Share-based compensation expense (in Dollars)                 $ 1,637,000 $ 301,000  
Employee share-based compensation (in Dollars)                 $ 4,549,000    
Weighted-average period                 1 year 6 months 3 days    
Percentage of shares issued         2.50% 2.50%          
Shares of placement agents for the offering         8,125            
Warrants carry term                 5 years    
Exercisable period                 180 years    
Exercisable at price (in Dollars per share)                 $ 0.28    
Aggregated fair value of warrants (in Dollars)         $ 30,000.00 $ 270,000          
Risk free rate         0.77% 0.68%          
Expected term         5 years 5 years          
Volatility rate         82.66% 65.24%          
Expected future dividends (in Dollars)                  
Public Offering Warrants [Member]                      
Shareholder’s Equity [Line Items]                      
Shares of placement agents for the offering           57,500          
2021 Share Option Plan [Member]                      
Shareholder’s Equity [Line Items]                      
Aggregate number of ordinary shares                 46,932,888    
Granted issuance of option                    
Vesting percentage 25.00%   25.00%       25.00%        
Regencell Bioscience Holdings Limited [Member]                      
Shareholder’s Equity [Line Items]                      
Ordinary shares, shares authorized 100,000,000,000               100,000,000,000   100,000,000,000
Ordinary shares, par value (in Dollars per share) $ 0.00001               $ 0.00001   $ 0.00001
Ordinary shares, shares issued 494,488,908               494,488,908   494,488,908
Ordinary shares, shares outstanding 494,488,908               494,488,908   494,488,908
Ordinary Shares [Member]                      
Shareholder’s Equity [Line Items]                      
Ordinary shares, shares authorized   100,000,000,000           100,000,000,000      
Ordinary shares, par value (in Dollars per share)               $ 0.00001      
Ordinary shares, shares issued   481,476,042           10,000,000,000      
Ordinary shares, shares outstanding   481,476,042           10,000,000,000      
Share split, description               On May 31, 2021, the board of directors approved a share subdivision of the Company’s authorized number of ordinary shares at a ratio of 1,000-for-1.      
Price per share (in Dollars per share)   $ 0.00001       $ 0.00001          
Aggregate shares   481,476,042                  
Additional ordinary shares   37                  
Share issued price per share (in Dollars per share)   $ 0.00001                  
Ordinary Shares [Member] | Regencell Bioscience Holdings Limited [Member]                      
Shareholder’s Equity [Line Items]                      
Ordinary shares, shares authorized               100,000,000,000      
Ordinary shares, par value (in Dollars per share)               $ 0.00001      
Ordinary shares, shares issued               10,000,000      
Ordinary shares, shares outstanding               10,000,000      
Minimum [Member]                      
Shareholder’s Equity [Line Items]                      
Granted issuance of option     15,585       1,235,076        
Number of share options, granted             46,755        
Exercise price per share (in Dollars per share)     $ 0.84       $ 0.25        
Market value of underlying stock price (in Dollars per share)         $ 0.17 0.24          
Exercise price of warrants (in Dollars per share)         0.28 0.28          
Maximum [Member]                      
Shareholder’s Equity [Line Items]                      
Granted issuance of option     592,230       46,932,888        
Number of share options, granted             1,776,690        
Exercise price per share (in Dollars per share)     $ 31.85       $ 9.5        
Market value of underlying stock price (in Dollars per share)         6.3 9.27          
Exercise price of warrants (in Dollars per share)         $ 10.45 10.45          
IPO [Member]                      
Shareholder’s Equity [Line Items]                      
Price per share (in Dollars per share)           $ 0.25          
Consummated shares           87,400,000          
IPO [Member] | Ordinary Shares [Member]                      
Shareholder’s Equity [Line Items]                      
Consummated shares       12,350,000              
Gross proceeds (in Dollars)           $ 21,850,000          
IPO [Member] | Minimum [Member]                      
Shareholder’s Equity [Line Items]                      
Gross proceeds (in Dollars)           21,850,000          
IPO [Member] | Maximum [Member]                      
Shareholder’s Equity [Line Items]                      
Gross proceeds (in Dollars)           $ 19,820,000          
Over-Allotment Option [Member]                      
Shareholder’s Equity [Line Items]                      
Additional proceeds received (in Dollars)       $ 2,850,000              
Over-Allotment Option [Member] | Ordinary Shares [Member]                      
Shareholder’s Equity [Line Items]                      
Consummated shares       12,350,000              
[1] Giving retroactive effect to the 38-for-1 share split (as defined below) effected on June 13, 2025.