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Shareholders’ Equity - Schedule of Stock Authorized and Issued (Details) - $ / shares
 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 25, 2024
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Dec. 31, 2023
Common Shares                
Stock options exercised (in shares)   17,390            
Issuance of shares under the ATM facility (in shares)     914,828          
Cancellation of Class C shares following an employee contract termination in MoonLake AG (in shares)     16,853          
Total Number of Ordinary Shares                
Authorized, beginning balance (in shares)   600,000,000 600,000,000       600,000,000  
Shares issued, beginning balance (in shares)   63,869,904 62,971,929       62,971,929  
Number of shares issued (in shares)     914,828          
Cancellation of Class C shares following an employee contract termination in MoonLake AG (in shares)     16,853          
Authorized, ending balance (in shares)   600,000,000 600,000,000       600,000,000  
Shares issued, ending balance (in shares)   63,887,294 63,869,904       63,887,294  
Common Class A                
Common Shares                
Authorized, beginning balance (in shares)     500,000,000       500,000,000  
Issued, beginning balance (in shares)     60,466,453       60,466,453  
Authorized, ending balance (in shares)   500,000,000         500,000,000  
Issued, ending balance (in shares)   63,046,025         63,046,025  
Total Number of Ordinary Shares                
Common stock, par value (CHF/USD per share)   $ 0.0001         $ 0.0001 $ 0.0001
Common Class C                
Common Shares                
Authorized, beginning balance (in shares)     100,000,000       100,000,000  
Issued, beginning balance (in shares)     2,505,476       2,505,476  
Authorized, ending balance (in shares)   100,000,000         100,000,000  
Issued, ending balance (in shares)   841,269         841,269  
Total Number of Ordinary Shares                
Common stock, par value (CHF/USD per share)   $ 0.0001         $ 0.0001 $ 0.0001
Common Stock | Common Class A                
Common Shares                
Authorized, beginning balance (in shares)   500,000,000 500,000,000       500,000,000  
Issued, beginning balance (in shares)   62,874,637 60,466,453       60,466,453  
Conversion of Class C Ordinary Shares into Class A Ordinary Shares (in shares) 153,998 153,998 1,493,356 74,678 4,587,713 176,603    
Stock options exercised (in shares)   17,390            
Issuance of shares under the ATM facility (in shares)     914,828   9,744,894      
Authorized, ending balance (in shares)   500,000,000 500,000,000       500,000,000  
Issued, ending balance (in shares)   63,046,025 62,874,637       63,046,025  
Total Number of Ordinary Shares                
Number of shares issued (in shares)     914,828   9,744,894      
Common stock, par value (CHF/USD per share)   $ 0.0001         $ 0.0001  
Common Stock | Common Class A | Conversion Of Class C into Class A                
Common Shares                
Conversion of Class C Ordinary Shares into Class A Ordinary Shares (in shares)   153,998 1,493,356          
Common Stock | Common Class C                
Common Shares                
Authorized, beginning balance (in shares)   100,000,000 100,000,000       100,000,000  
Issued, beginning balance (in shares)   995,267 2,505,476       2,505,476  
Conversion of Class C Ordinary Shares into Class A Ordinary Shares (in shares) 153,998 (153,998) (1,493,356) (74,678) (4,587,713) (176,603)    
Cancellation of Class C shares following an employee contract termination in MoonLake AG (in shares)     16,853          
Authorized, ending balance (in shares)   100,000,000 100,000,000       100,000,000  
Issued, ending balance (in shares)   841,269 995,267       841,269  
Total Number of Ordinary Shares                
Cancellation of Class C shares following an employee contract termination in MoonLake AG (in shares)     16,853          
Common stock, par value (CHF/USD per share)   $ 0.0001         $ 0.0001  
Common Stock | Common Class C | Conversion Of Class C into Class A                
Common Shares                
Conversion of Class C Ordinary Shares into Class A Ordinary Shares (in shares)   (153,998) (1,493,356)