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Share-based Compensation - Assumptions (Details)
10 Months Ended 12 Months Ended
Apr. 06, 2022
$ / shares
shares
Oct. 25, 2021
SFr / shares
$ / shares
Sep. 09, 2021
$ / shares
SFr / shares
Jul. 27, 2021
SFr / shares
$ / shares
Dec. 31, 2021
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2022
SFr / shares
shares
Mar. 31, 2022
shares
Mar. 10, 2021
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                    
Enterprise value | $           $ 360,000,000 $ 360,000,000      
Fully diluted shares (in shares) | shares           1,070,196 1,070,196      
MoonLake AG Restricted Founder Shares                    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                    
Estimated fair value per share of Restricted Founder Shares on the grant date (in dollars per share)           $ 49        
Estimated fair value of Restricted Founder Shares on the resignation date of one of the co-founders of MoonLake AG (in dollars per share)           336.39        
Purchase price (in CHF per share) | SFr / shares               SFr 0.1    
Awards outstanding (in shares) | shares         4,440,309   4,440,309 1,110,078   0
ESPP                    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                    
Estimated fair value per share of Restricted Founder Shares on the grant date (in dollars per share)   $ 336.39 $ 49 $ 49   $ 336.39        
Purchase price (in CHF per share) | SFr / shares   $ 0.1 $ 0.1 $ 0.1       SFr 0.1    
Awards outstanding (in shares) | shares         1,060,561   1,060,561 2,237,915 2,237,915 0
Equity Incentive Plan                    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                    
Estimated fair value of the option on the grant date using Black-Scholes model (in shares) | shares 180,000         180,000        
Estimated fair value of the option on the grant date using Black-Scholes model (in dollars per share) $ 8.25                  
Exercise price (in dollars per share) $ 12.25                  
Expected term of the award 6 years                  
Expected volatility of the share price 75.00%                  
Risk-free interest rate 3.00%                  
Expected dividend rate 0.00%                  
Employee Stock Option Plan (ESOP) | Research and development services                    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                    
Estimated fair value of the option on the grant date using Black-Scholes model (in shares) | shares         224,033 242,736        
Estimated fair value of the option on the grant date using Black-Scholes model (in dollars per share)   $ 336.30 $ 32.93     $ 172.57        
Exercise price (in dollars per share) | SFr / shares   $ 0.10 $ 43.80         SFr 27.25    
Expected term of the award   6 years 6 years     6 years        
Expected volatility of the share price   75.00% 75.00%     75.00%        
Risk-free interest rate   1.00% 1.00%     3.00%        
Expected dividend rate   0.00% 0.00%     0.00%