v3.25.3
Nature of Operations - Additional Information (Details)
 3 Months Ended 9 Months Ended
Sep. 23, 2025
USD ($)
shares
Sep. 22, 2025
USD ($)
shares
Aug. 20, 2025
USD ($)
shares
Jul. 22, 2025
shares
Jun. 12, 2025
shares
Aug. 30, 2024
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
shares
Organization and Business Operation [Line Items]                      
Common stock, per value (in Dollars per share) | $ / shares             $ 0.0001   $ 0.0001   $ 0.0001
Common stock, shares authorized             740,000,000   740,000,000   200,000,000
Preferred stock, shares authorized             45,000,000   45,000,000   45,000,000
Preferred stock, par value (in Dollars per share) | $ / shares             $ 0.0001   $ 0.0001   $ 0.0001
Stockholders' equity note, stock split description                 effected a 160,000-for-1 forward stock split of all outstanding shares of Common Stock which proportionally increased the number of all issued and outstanding shares of Common Stock from 1,000 to 160,000,000 and did not change the par value per share.    
Stockholders equity stock split conversion ratio           160,000          
Common stock, shares issued             229,740,978   229,740,978   200,000,000
Common stock, shares outstanding             229,740,978   229,740,978   200,000,000
Warrants outstanding             8,760,000   8,760,000    
Exercise price, per share (in Dollars per share) | $ / shares             $ 11.5   $ 11.5    
Warrant expire time             5 years   5 years    
Cash and cash equivalents | $             $ 85,000   $ 85,000   $ 12,000
Accumulated deficit | $             (269,642,000)   (269,642,000)   $ (115,384,000)
Operating losses | $             $ 152,594,000 $ 1,298,000 154,258,000 $ 3,914,000  
Cash flows from operations | $                 $ (2,262,000) $ (3,484,000)  
Shares of common stock (in Shares)             300,000   300,000    
Sponsor [Member]                      
Organization and Business Operation [Line Items]                      
Common stock held shares   2,072,500                  
Debt conversion original debt amount | $   $ 100,000                  
Consulting Services Agreement with JW Investment Management Company Limited [Member]                      
Organization and Business Operation [Line Items]                      
Percentage of cash financing service fee         7.00%       7.00%    
Scilex Holding Company [Member]                      
Organization and Business Operation [Line Items]                      
Common stock held shares   500,000                  
Scilex Holding Company [Member] | Legacy Semnur Stock Options [Member]                      
Organization and Business Operation [Line Items]                      
Conversion of shares converted                 400,000,000    
Scilex Holding Company [Member] | Stock Option [Member]                      
Organization and Business Operation [Line Items]                      
Conversion of shares issued                 50,000,000    
Scilex Holding Company [Member] | Debt Exchange Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Debt conversion original debt amount | $   $ 54,200,000                  
Merger Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Common stock exchange ratio                 1.25    
Business combination shares exchanged   229,740,978                  
Legacy Semnur Series A Preferred Stock [Member] | Scilex Holding Company [Member] | Debt Exchange Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Debt conversion, converted instrument, shares issued   5,423,606                  
Class B Ordinary Shares [Member]                      
Organization and Business Operation [Line Items]                      
Sale of stock price per share (in Dollars per share) | $ / shares             $ 0.0001   $ 0.0001    
Per public share (in Dollars per share) | $ / shares             $ 0.0001   $ 0.0001    
Agreed to purchase (in Shares)                 500,000    
Aggregate consideration to purchase | $                 $ 2,000,000    
Series A Preferred Stock [Member] | Scilex Holding Company [Member] | Debt Exchange Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Debt conversion, converted instrument, shares issued   5,423,606                  
Legacy Semnur Common Stock [Member] | Scilex Holding Company [Member]                      
Organization and Business Operation [Line Items]                      
Conversion of shares converted                 160,000,000    
Common Stock [Member] | Sponsor [Member]                      
Organization and Business Operation [Line Items]                      
Conversion of shares converted   2,072,500                  
Debt conversion, converted instrument, shares issued   12,488                  
Common Stock [Member] | Securities Purchase Agreement (PIPE SPA)                      
Organization and Business Operation [Line Items]                      
Sponsor transferred (in Shares)     1,250,000                
Sale of stock per transaction | $     $ 16,000                
Total consideration | $     $ 20,000,000                
Common Stock [Member] | Bitcoin Securities Purchase Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Sponsor transferred (in Shares) 6,250,000                    
Sale of stock per transaction | $ $ 16,000                    
Total consideration | $ $ 100,000,000                    
Common Stock [Member] | Consulting Services Agreement with JW Investment Management Company Limited [Member]                      
Organization and Business Operation [Line Items]                      
Sponsor transferred (in Shares)       8,000,000 10,000,000       10,000,000    
Common Stock [Member] | Scilex Holding Company [Member]                      
Organization and Business Operation [Line Items]                      
Conversion of shares converted   500,000                  
Conversion of shares issued                 200,000,000    
Common Stock [Member] | Scilex Holding Company [Member] | Debt Exchange Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Debt conversion, converted instrument, shares issued   542,361                  
Consultants [Member] | Merger Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Business combination shares exchanged   26,500,000                  
Underwriters [Member] | Merger Agreement [Member]                      
Organization and Business Operation [Line Items]                      
Business combination shares exchanged   100,000