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Shareholders’ Equity - Narrative (Details)
 3 Months Ended
Mar. 08, 2024
USD ($)
shares
Jul. 10, 2023
USD ($)
Jul. 09, 2023
USD ($)
shares
Jun. 30, 2023
USD ($)
shares
Jun. 27, 2023
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
vote
$ / shares
shares
Mar. 31, 2024
USD ($)
$ / shares
shares
Jun. 30, 2023
shares
Mar. 31, 2023
shares
Dec. 31, 2023
$ / shares
shares
Aug. 31, 2023
USD ($)
May 11, 2023
USD ($)
Dec. 31, 2022
shares
Apr. 28, 2021
shares
Class of Stock [Line Items]                            
Sale of stock, stamp duty tax | $ $ 1,600,000 $ 2,800,000                        
May 2023 Sales Agreement | ATM Shares                            
Class of Stock [Line Items]                            
Sale of stock, authorized amount (in shares) | $                       $ 200,000,000    
Sale of stock, remaining authorized repurchase amount | $         $ 0                  
May 2023 And August 2023 Sales Agreement | ATM Shares                            
Class of Stock [Line Items]                            
Sale of stock, authorized amount (in shares) | $                     $ 350,000,000      
MoonLake AG                            
Class of Stock [Line Items]                            
Common shares, shares outstanding (in shares)                           110,000
MoonLake AG | MoonLake Immunotherapeutics                            
Class of Stock [Line Items]                            
Net proceeds from the business combination | $ 800,000   $ 38,900,000                      
Proceeds from contributions from parent | $ $ 150,000,000 $ 275,000,000                        
Underwriting Agreement                            
Class of Stock [Line Items]                            
Sale of stock (in shares)         8,000,000                  
Issuance price per share (USD per share) | $ / shares         $ 50.00                  
Net proceeds from the business combination | $       $ 436,700,000                    
Payments of stock issuance costs | $       $ 23,300,000                    
Underwriting Agreement | MoonLake AG | MoonLake Immunotherapeutics                            
Class of Stock [Line Items]                            
Sale of stock (in shares) 501   22,756                      
Over-Allotment Option                            
Class of Stock [Line Items]                            
Sale of stock (in shares)         1,200,000                  
Sale of stock, option to purchase, term         30 days                  
August 2023 Sales Agreement                            
Class of Stock [Line Items]                            
Sale of stock (in shares)             914,828              
Issuance price per share (USD per share) | $ / shares             $ 58.31              
Net proceeds from the business combination | $           $ 0 $ 52,500,000              
Common Stock | MoonLake AG                            
Class of Stock [Line Items]                            
Treasury stock, shares, acquired (in shares) 501                          
Common Class A                            
Class of Stock [Line Items]                            
Common shares, shares issued (in shares)           62,874,637       60,466,453        
Common shares, shares outstanding (in shares)           62,874,637       60,466,453        
Common shares, shares authorized (in shares)           500,000,000       500,000,000        
Common shares, par value (USD per share) | $ / shares           $ 0.0001       $ 0.0001        
Common Class A | Common Stock                            
Class of Stock [Line Items]                            
Common shares, shares issued (in shares)           62,874,637 62,874,637     60,466,453        
Common shares, shares outstanding (in shares)       53,486,810   62,874,637 62,874,637 53,486,810 39,154,203 60,466,453     38,977,600  
Common shares, shares authorized (in shares)           500,000,000 500,000,000     500,000,000        
Common shares, par value (USD per share) | $ / shares           $ 0.0001                
Common shares, votes per share | vote           1                
Conversion and transfer of shares between classes (in shares)             1,493,356 4,587,713 176,603          
Common Class C                            
Class of Stock [Line Items]                            
Common shares, shares issued (in shares)           995,267       2,505,476        
Common shares, shares outstanding (in shares)           995,267       2,505,476        
Common shares, shares authorized (in shares)           100,000,000       100,000,000        
Common shares, par value (USD per share) | $ / shares           $ 0.0001       $ 0.0001        
Common Class C | MoonLake AG                            
Class of Stock [Line Items]                            
Common shares, shares outstanding (in shares)                           3,700,257
Common Class C | Common Stock                            
Class of Stock [Line Items]                            
Common shares, shares issued (in shares)           995,267 995,267     2,505,476        
Common shares, shares outstanding (in shares)       8,959,195   995,267 995,267 8,959,195 13,546,908 2,505,476     13,723,511  
Common shares, shares authorized (in shares)           100,000,000 100,000,000     100,000,000        
Common shares, par value (USD per share) | $ / shares           $ 0.0001                
Common shares, votes per share | vote           1                
Conversion and transfer of shares between classes (in shares)             (1,493,356) (4,587,713) (176,603)          
Common Class C | Common Stock | MoonLake AG                            
Class of Stock [Line Items]                            
Treasury stock, shares, acquired (in shares) 16,853