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Share-based Compensation - Assumptions (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 $ / shares | Dec. 31, 2022 $ / shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2022 SFr / shares | Dec. 31, 2021 SFr / shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Enterprise value | $ |  |  | $ 360,000,000 |  |
Fully diluted shares (in shares) | shares |  |  | 1,070,196 |  |
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 dollars per share) | $ 25.58 | $ 8.25 |  |  |
Exercise price (in dollars per share) | $ 37.22 | $ 12.25 |  |  |
Expected term of the award | 6 years | 6 years |  |  |
Expected volatility of the share price | 75.00% | 75.00% |  |  |
Risk-free interest rate | 4.00% | 3.00% |  |  |
Expected dividend rate | 0.00% | 0.00% |  |  |
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
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 |  |  |
Purchase price (in CHF per share) | SFr / shares |  |  |  | SFr 0.1 |
ESOP | Employee Stock Option Plan (ESOP) |  |  |  |  |
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 dollars per share) | $ 25.5 | 4.21 |  |  |
Exercise price (in dollars per share) | $ 37.1 | $ 3.64 |  |  |
Expected term of the award | 6 years | 6 years |  |  |
Expected volatility of the share price | 75.00% | 75.00% |  |  |
Risk-free interest rate | 4.00% | 3.00% |  |  |
Expected dividend rate | 0.00% | 0.00% |  |  |

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- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Founder Resignation Date Fair Value + References No definition available. + Details
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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Estimated Grant Date Fair Value Calculation, Denominator, Fully Diluted Shares + References No definition available. + Details
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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Estimated Grant Date Fair Value Calculation, Numerator, Enterprise + References No definition available. + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. + References No definition available. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Line items represent financial concepts included in a table. 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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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