Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Denominator
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Trading Arrangement:
Trading Arrangement [Axis]
Title of 12(b) Security
Title of 12(b) Security
Subsequent Event
Subsequent Event [Member]
Debt Securities, Available-for-Sale [Table]
Debt Securities, Available-for-Sale [Table]
Document Fiscal Year Focus
Document Fiscal Year Focus
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Financial Instrument [Axis]
Financial Instrument [Axis]
Segment Reporting [Abstract]
Common shares
Common Stock, Value, Issued
2027
Lessee, Operating Lease, Liability, to be Paid, Year One
Bonuses and related employee compensation expenses
Employee-related Liabilities, Current
Other prepayments
Other Prepaid Expense, Current
Line of Credit
Line of Credit [Member]
Restatement Determination Date
Restatement Determination Date
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Issuance of class A ordinary shares and pre-funded warrants under the 2026 offering, net of transaction costs (in shares)
Stock And Pre-Funded Warrants Issued During Period, Shares, New Issues
Stock And Pre-Funded Warrants Issued During Period, Shares, New Issues
Class of Warrant or Right [Domain]
Class of Warrant or Right [Domain]
Tranche 4 Milestone
Tranche 4 Milestone [Member]
Tranche 4 Milestone
Schedule of prepaid expenses
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Amendment Flag
Amendment Flag
Current liabilities
Liabilities, Current [Abstract]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Portugal
PORTUGAL
Debt instrument, end-of-term charge, percentage
Debt Instrument, End-Of-Term Charge, Percentage
Debt Instrument, End-Of-Term Charge, Percentage
Schedule of investments in short-term marketable debt securities
Debt Securities, Available-for-Sale [Table Text Block]
Leases [Abstract]
Total non-current liabilities
Liabilities, Noncurrent
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Schedule of Cash and Cash Equivalents
Schedule of Cash and Cash Equivalents [Table Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Common shares, par value (USD per share)
Common Stock, Par or Stated Value Per Share
Accreted present value of End of Term Charge
Debt Instrument, Accreted Present Value of End of Term Charge
Debt Instrument, Accreted Present Value of End of Term Charge
Non-current liabilities
Liabilities, Noncurrent [Abstract]
Awards unvested, beginning balance (in shares)
Awards unvested, ending balance (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Accrued expenses and other current liabilities
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Weighted-average number of Class A Ordinary Shares, basic (in shares)
Total weighted average number of outstanding shares, basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Share-Based Payment Arrangement, Tranche One
Share-Based Payment Arrangement, Tranche One [Member]
Retirement Benefits [Abstract]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Total current liabilities
Liabilities, Current
Tranche 3 Milestone
Tranche 3 Milestone [Member]
Tranche 3 Milestone
Entity Address, City or Town
Entity Address, City or Town
Awards granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Loss before income tax
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Statement of Financial Position [Abstract]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Awards vested (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Class of Stock [Axis]
Class of Stock [Axis]
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Underwriting Agreement
Underwriting Agreement [Member]
Underwriting Agreement
Level 2
Fair Value, Inputs, Level 2 [Member]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Other comprehensive income (loss)
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
License
License [Member]
United States
UNITED STATES
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Issuance of class A ordinary shares, net of transaction costs
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Stamp duty fees for capital injection from MoonLake to MoonLake AG
Adjustments to Additional Paid in Capital, Other
Schedule of Long-Term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Debt Instrument, market capitalization threshold
Debt Instrument, Market Capitalization Threshold
Debt Instrument, Market Capitalization Threshold
Recently Issued Accounting Pronouncements Adopted and Not Yet Adopted
New Accounting Pronouncements, Policy [Policy Text Block]
Noncontrolling Interests
Noncontrolling Interest [Member]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Schedule of accrued expenses and other current liabilities
Schedule of Accrued Liabilities [Table Text Block]
Exercise price of pre-funded warrants
Class of Warrant or Right, Exercise Price of Warrants or Rights
Debt instrument, end-of-term charge, repayment prior to 24 months, percentage
Debt Instrument, End-Of-Term Charge, Repayment Prior To 24 Months, Percentage
Debt Instrument, End-Of-Term Charge, Repayment Prior To 24 Months, Percentage
Long-term debt
Carrying value
Long-Term Debt
Schedule of Future Lease Payments
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Document Period End Date
Document Period End Date
Changes in operating assets and liabilities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Net cash flow (used in) provided by investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Preferred stock, shares outstanding (in shares)
Preferred Stock, Shares Outstanding
Principal amount
Debt Instrument, Face Amount
2028
Lessee, Operating Lease, Liability, to be Paid, Year Two
Shareholders’ Equity
Equity [Text Block]
Security Exchange Name
Security Exchange Name
Debt instrument, interest rate, effective percentage
Debt Instrument, Interest Rate, Effective Percentage
Awards granted (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Common Class B
Common Class B [Member]
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
Entity Shell Company
Entity Shell Company
Share-based compensation arrangement by share-based payment award, number of shares authorized (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
Short-term portion of operating lease liabilities
Less current portion of lease liability
Operating Lease, Liability, Current
Schedule of debt securities by level within the fair value hierarchy
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
Net Loss per Share
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
Earnings Per Share [Abstract]
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Document Fiscal Period Focus
Document Fiscal Period Focus
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Total liabilities
Liabilities
Trading Symbol
Trading Symbol
Geographical [Domain]
Geographical [Domain]
Purchase of property and equipment
Payments to Acquire Property, Plant, and Equipment
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Tax liabilities
Accrued Income Taxes, Current
Company Selected Measure Name
Company Selected Measure Name
Sale of Stock [Domain]
Sale of Stock [Domain]
Purchase of short-term marketable debt securities
Payments to Acquire Debt Securities, Available-for-Sale
Preferred stock, votes attached to shares
Preferred Stock, Votes Attached To Shares
Preferred Stock, Votes Attached To Shares
Income Tax Disclosure [Abstract]
Net unrealized gain (loss) on marketable securities and short-term investments
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table]
Defined contribution plan, increase (decrease), cost
Defined Contribution Plan, Increase (Decrease), Cost
Debt instrument, consecutive trading days
Debt Instrument, Market Capitalization, Threshold Consecutive Trading Days
Debt Instrument, Market Capitalization, Threshold Consecutive Trading Days
Compensation Amount
Outstanding Recovery Compensation Amount
Individual:
Individual [Axis]
Weighted-average number of Class A Ordinary Shares, diluted (in shares)
Total weighted average number of outstanding shares, diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Entity Emerging Growth Company
Entity Emerging Growth Company
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Option to purchase
Underwriter, Option To Purchase
Underwriter, Option To Purchase
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Operating lease right-of-use assets
Increase (Decrease) In Operating Lease, Right-Of-Use Asset
Increase (Decrease) In Operating Lease, Right-Of-Use Asset
Eurocommercial Papers
Commercial Paper [Member]
Vesting percentage
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage
Less imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Share-Based Payment Arrangement, Tranche Four
Share-Based Payment Arrangement, Tranche Four [Member]
Share-Based Payment Arrangement, Tranche Four
Other non-current assets
Increase (Decrease) in Other Noncurrent Assets
Restricted Cash
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Operating lease, payments
Operating Lease, Payments
Award Timing Predetermined
Award Timing Predetermined [Flag]
Intrinsic value of options exercised
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale [Line Items]
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Debt Instrument, Tranche [Domain]
Debt Instrument, Tranche [Domain]
Debt Instrument, Tranche [Domain]
Risks and Liquidity
Risk And Liquidity Disclosure [Text Block]
Risk And Liquidity Disclosure
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Total lease payments
Lease payments
Lessee, Operating Lease, Liability, to be Paid
Share-based compensation under the Employee Share Participation Plan and the Equity Incentive Plan
Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture
Beginning balance, awards unvested (in dollars per share)
Ending balance, awards unvested (in dollars per share)
Estimated fair value of common shares on the grant date (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
All Executive Categories
All Executive Categories [Member]
Operating lease liabilities
Increase (Decrease) in Operating Lease Liability
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Actuarial gain on employee benefit plans
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
Preferred shares, par value (in usd per share)
Preferred Stock, Par or Stated Value Per Share
Components of net periodic benefit cost under the plan
Schedule of Net Benefit Costs [Table Text Block]
Vesting [Domain]
Vesting [Domain]
Plan Name [Domain]
Plan Name [Domain]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Scenario [Domain]
Scenario [Domain]
Awards outstanding, beginning balance (in dollars per share)
Awards outstanding, ending balance (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Number of Shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Supply and manufacturing services
Supply And Manufacturing Expense, Current
Supply And Manufacturing Expense, Current
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Issuance of Class A Ordinary Shares and Pre-Funded Warrants under the 2026 Offering, net of transaction costs
Stock And Pre-Funded Warrant Issued During Period, Value, New Issues
Stock And Pre-Funded Warrant Issued During Period, Value, New Issues
Schedule of earnings per share, basic and diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Fair Value Disclosures [Abstract]
Debt instrument, interest rate, reduction upon achievement of milestone
Debt Instrument, Interest Rate, Reduction Upon Achievement Of Milestone
Debt Instrument, Interest Rate, Reduction Upon Achievement Of Milestone
Debt Disclosure [Abstract]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Segment Information
Segment Reporting [Text Block]
Investments
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Proceeds from maturities of short-term marketable debt securities
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Expiration Date
Trading Arrangement Expiration Date
Non-clinical research and clinical development services
Prepaid Research And Development Expense
Prepaid Research And Development Expense
Sale of stock, authorized amount (in shares)
Sale Of Stock, Authorized Amount
Sale Of Stock, Authorized Amount
Class of Warrant or Right [Axis]
Class of Warrant or Right [Axis]
Income Statement Location [Axis]
Location, Statement of Income, Balance [Axis]
Restricted cash in other non-current assets
Restricted Cash and Cash Equivalent
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Equity, beginning balance
Equity, end balance
Equity, Including Portion Attributable to Noncontrolling Interest
Weighted-average remaining contractual term, awards outstanding
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Exercise price (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price
Trade and other payables
Trade And Other Payables, Current
Trade And Other Payables, Current
Exercisable (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Proceeds from Issuance of Common Stock
Proceeds from Issuance of Common Stock
Common shares, shares authorized (in shares)
Common Stock, Shares Authorized
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Security, Excluded EPS Calculation [Table]
Debt instrument, days following milestone achievement date
Debt Instrument, Days Following Milestone Achievement Date
Debt Instrument, Days Following Milestone Achievement Date
Sale of stock (in shares)
Sale of Stock, Number of Shares Issued in Transaction
Milestone variable consideration amount
Revenue Remaining Performance Obligation Additional Milestone Variable Consideration Amount
Revenue Remaining Performance Obligation Additional Milestone Variable Consideration Amount
Exercise Price
Award Exercise Price
Unrecognized compensation expense
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Document Quarterly Report
Document Quarterly Report
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Employee Benefit Plans
Compensation and Employee Benefit Plans [Text Block]
Effect of movements in exchange rates on cash held
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset [Table Text Block]
Debt
Debt Disclosure [Text Block]
Scenario [Axis]
Scenario [Axis]
Less: Unamortized debt discount, issuance costs, and End of Term Charge
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Equity Component [Domain]
Equity Component [Domain]
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Net proceeds from the transaction
Sale of Stock, Consideration Received on Transaction
Adoption Date
Trading Arrangement Adoption Date
Counterparty Name [Domain]
Counterparty Name [Domain]
Debt instrument, interest rate, stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Total shareholders’ equity
Equity, Attributable to Parent
Prepaid Expenses
Other Current Assets [Text Block]
Insurances
Prepaid Insurance
Assets
Assets [Abstract]
Title
Trading Arrangement, Individual Title
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Amortized cost
Debt Securities, Available-for-Sale, Amortized Cost
Accounting Policies [Abstract]
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Risk-free interest rate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Total lease liability
Operating Lease, Liability
Payments of stock issuance costs
Payments of Stock Issuance Costs
Insider Trading Policies and Procedures [Line Items]
Awards outstanding (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Accrued Expenses and Other Current Liabilities
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Schedule of nonvested share activity
Schedule of Nonvested Share Activity [Table Text Block]
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Research and development services
Accrued Research And Development Services, Current
Accrued Research And Development Services, Current
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Number of operating segments
Number of Operating Segments
Antidilutive securities excluded from computation of earnings per share, amount (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Entity Central Index Key
Entity Central Index Key
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Shareholders' equity
Equity [Abstract]
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Net cash flow used in operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Income Statement [Abstract]
Document Transition Report
Document Transition Report
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Tranche 1 Loan
Tranche 1 Loan [Member]
Tranche 1 Loan
Operating expenses
Operating Expenses [Abstract]
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Summary of weighted average assumptions for awards issued
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Number of Options
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Debt instrument, basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Consultant and other fees
Accrued Consulting And Other Fees, Current
Accrued Consulting And Other Fees, Current
City Area Code
City Area Code
Revenue remaining performance obligation additional variable consideration amount
Revenue Remaining Performance Obligation Additional Variable Consideration Amount
Revenue Remaining Performance Obligation Additional Variable Consideration Amount
Restricted Stock
Restricted Stock [Member]
Accumulated Other Comprehensive Income
AOCI Attributable to Parent [Member]
All Individuals
All Individuals [Member]
Subsequent Events
Subsequent Events [Text Block]
Name
Forgone Recovery, Individual Name
Weighted average period of recognition
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Weighted-Average Grant Date Fair Value
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Lessee, operating lease not yet commenced, term of contract
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract
Total non-current assets
Assets, Noncurrent
Statement [Line Items]
Statement [Line Items]
Tranche 2 Milestone
Tranche 2 Milestone [Member]
Tranche 2 Milestone
Total assets
Assets
Unvested awards canceled voluntarily
Share-Based Compensation Arrangement by Share-Based Payment Award, Accelerated Vesting, Number
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued
Ordinary shares reserved for future issuance (in shares)
Common Stock, Capital Shares Reserved for Future Issuance
Prior service credit recognized in current year
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Estimated fair value of the option on the grant date using Black-Scholes model (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Interest expense
Interest Expense, Nonoperating
Schedule of share-based compensation expense driven by share-based compensation plans and programs
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Supply and manufacturing services
Accrued Supply And Manufacturing Fees, Current
Accrued Supply And Manufacturing Fees, Current
Gross unrealized gains
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Share-Based Compensation
Share-Based Payment Arrangement [Text Block]
Other comprehensive income before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Issuance of Class A Ordinary Shares and Pre-Funded Warrants under the 2026 Offering, net of transaction costs
Proceeds From Issuance Of Stock And Pre-Funded Warrants
Proceeds From Issuance Of Stock And Pre-Funded Warrants
Issuance of class A ordinary shares under the sales agreement, net of transaction costs (in shares)
Stock Issued During Period, Shares, New Issues
PEO
PEO [Member]
Prepaid expenses
Increase (Decrease) in Prepaid Expense
Share-based compensation expense
Share-Based Payment Arrangement, Expense
Employee Stock Option Plan (ESOP)
Employee Stock Option Plan (ESOP) [Member]
Employee Stock Option Plan (ESOP)
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Option exercised and converted under the employee stock option plan, net of stamp duty fee (in shares)
Awards exercised (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Awards granted (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Common Class C
Common Class C [Member]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Payables and Accruals [Abstract]
Accumulated Deficit
Retained Earnings [Member]
Long-term portion of operating lease liabilities
Operating Lease, Liability, Noncurrent
Total operating expenses
Operating Expenses
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Awards forfeited (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares, shares outstanding (in shares)
Common stock, beginning balance (in shares)
Common stock, ending balance (in shares)
Common Stock, Shares, Outstanding
Award Timing Disclosures [Line Items]
Basic net loss per share attributable to controlling interest shareholders (USD per share)
Net loss per share - diluted (in USD per share)
Earnings Per Share, Diluted
Entity Current Reporting Status
Entity Current Reporting Status
Net cash flow provided by financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Total Shareholder Return Amount
Total Shareholder Return Amount
Research and development
Research and Development Expense
Share-Based Payment Arrangement [Abstract]
Property and equipment, net
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization
Interest cost
Defined Benefit Plan, Interest Cost
Financial Instruments [Domain]
Financial Instruments [Domain]
Options exercised and converted under the Employee Stock Option Plan, net of stamp duty fee
Stock Issued During Period, Value, Stock Options Exercised
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Underlying Securities
Award Underlying Securities Amount
Comprehensive loss attributable to noncontrolling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Issuance of Class A Ordinary Shares under the Sales Agreement, net of transaction costs
Stock Issued During Period, Value, New Issues
Over-Allotment Option
Over-Allotment Option [Member]
Prepaid expenses
Total
Prepaid Expense, Current
Awards forfeited (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Preferred Stock
Preferred Stock [Member]
Credit Facility
Credit Facility [Member]
Credit Facility
Weighted average discount rate
Operating Lease, Weighted Average Discount Rate, Percent
Common shares, votes per share
Common Stock, Votes Attached To Shares
Common Stock, Votes Attached To Shares
Common shares issuable (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
Sale of Stock [Axis]
Sale of Stock [Axis]
Employee Stock Ownership Plan (ESOP) [Table]
Employee Stock Ownership Plan (ESOP) [Table]
Lease, Cost
Lease, Cost [Table Text Block]
Other current assets
Other Assets, Current
Commitments and Contingencies Disclosure [Abstract]
All Trading Arrangements
All Trading Arrangements [Member]
Other Performance Measure, Amount
Other Performance Measure, Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Debt instrument, annual principal payment, term
Debt Instrument, Annual Principal Payment, Term
Debt Instrument, Annual Principal Payment, Term
Operating loss
Operating Income (Loss)
Current Fiscal Year End Date
Current Fiscal Year End Date
SLK Program
Sonelokimab Program ("SLK Program") [Member]
Sonelokimab Program ("SLK Program")
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Long-lived assets
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount
License fees
Accrued Licensing Fees
Accrued Licensing Fees
Estimated future minimum lease payment amount
Unrecorded Unconditional Purchase Obligation
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Entity File Number
Entity File Number
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Service cost
Defined Benefit Plan, Service Cost
Sales Agreements
Sales Agreements [Member]
Sales Agreements
Schedule of option activity for share-based payment arrangement
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Weighted-Average Exercise Price
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares, shares issued (in shares)
Common Stock, Shares, Issued
Measure:
Measure [Axis]
Cash flow from operating activities
Cash Flow, Operating Activities, Lessee [Abstract]
Short-term marketable debt securities
Debt Securities, Available-for-Sale, Current
Equity Components [Axis]
Equity Components [Axis]
Deferred charges - long-term debt
Deferred Costs, Noncurrent
Product and Service [Domain]
Product and Service [Domain]
Class of Stock [Line Items]
Class of Stock [Line Items]
Common Class A
Common Class A [Member]
Entity Interactive Data Current
Entity Interactive Data Current
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Of which: net loss attributable to noncontrolling interests shareholders
Net Income (Loss) Attributable to Noncontrolling Interest
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Contributions made to plan
Defined Contribution Plan, Cost
Entity Small Business
Entity Small Business
Comprehensive loss attributable to controlling interests shareholders
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
2029
Lessee, Operating Lease, Liability, to be Paid, Year Three
Termination Date
Trading Arrangement Termination Date
Subsequent Events [Abstract]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Expiration period
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period
Other non-current assets
Other Assets, Noncurrent
Document Type
Document Type
Fair Value as of Grant Date
Award Grant Date Fair Value
Aggregate intrinsic value, awards exercisable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Arrangement Duration
Trading Arrangement Duration
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Net periodic pension benefit (gain) loss for the qualified pension plan
Pension Expense (Reversal of Expense), Noncash
Statement of Stockholders' Equity [Abstract]
Proceeds from long-term debt, net of issuance costs
Proceeds from Issuance of Long-Term Debt
Local Phone Number
Local Phone Number
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Entity Registrant Name
Entity Registrant Name
Variable consideration amount
Revenue Remaining Performance Obligation Variable Consideration Amount
Revenue Remaining Performance Obligation Variable Consideration Amount
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Switzerland
SWITZERLAND
Commitments and contingencies (Note 15)
Commitments and Contingencies
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Executive Category:
Executive Category [Axis]
Counterparty Name [Axis]
Counterparty Name [Axis]
Liabilities and Equity
Liabilities and Equity [Abstract]
Other Commitments [Table]
Other Commitments [Table]
Weighted-average remaining contractual term, awards exercisable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Award Type [Domain]
Award Type [Domain]
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
2026 (remainder of the year)
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year
Fair Value Measurements
Fair Value Disclosures [Text Block]
Supplementary disclosure of cash flow information:
Supplemental Cash Flow Information [Abstract]
Expected term of the award
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Lessee, operating lease, term of contract
Lessee, Operating Lease, Term of Contract
PEO Name
PEO Name
Geographical [Axis]
Geographical [Axis]
Accrued expenses and other current liabilities
Total
Accrued Liabilities and Other Liabilities
Cash, cash equivalents, and short-term investments
Cash, Cash Equivalents, and Short-Term Investments
Concentration of Credit Risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Entity Tax Identification Number
Entity Tax Identification Number
Interest expense, debt
Interest Expense, Debt
Other Commitments [Line Items]
Other Commitments [Line Items]
Awards exercised (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Cash, cash equivalents, and restricted cash, beginning of period
Cash, cash equivalents, and restricted cash, end of period
Total
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Trade and other payables
Increase (Decrease) in Accounts Payable
Common stock, conversion ratio (in shares)
Common Stock, Conversion Ratio
Common Stock, Conversion Ratio
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Equity Incentive Plan
Equity Incentive Plan [Member]
Equity Incentive Plan
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Non-NEOs
Non-NEOs [Member]
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Overview of the Company
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Comprehensive loss
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Debt Instrument [Axis]
Debt Instrument [Axis]
Subsequent Event [Table]
Subsequent Event [Table]
Share-based compensation expense
Share-Based Payment Arrangement, Noncash Expense
Total lease expense
Lease, Cost
Schedule of Debt
Schedule of Debt [Table Text Block]
Conversion of MoonLake class C ordinary shares into class A ordinary shares (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities
ESPP
Employee Stock [Member]
Leases
Lessee, Operating Leases [Text Block]
Long-Term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Diluted net loss per share attributable to controlling interest shareholders (USD per share)
Net loss per share - basic (in USD per share)
Earnings Per Share, Basic
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Total current assets
Assets, Current
Insider Trading Arrangements [Line Items]
Tranche 6 Loan
Tranche 6 Loan [Member]
Tranche 6 Loan
Award Type [Axis]
Award Type [Axis]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Pre-funded warrants fair value
Adjustments to Additional Paid in Capital, Warrant Issued
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Product and Service [Axis]
Product and Service [Axis]
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Common Stock
Common Stock [Member]
Fair value
Debt Securities, Available-for-Sale
Expected volatility of the share price
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Operating lease expense
Operating Lease, Cost
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Stamp duty on capital injection from MoonLake to MoonLake AG
Payments Of Stamp Duty
Payments Of Stamp Duty
Cover [Abstract]
Expected dividend rate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
United Kingdom
UNITED KINGDOM
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Total liabilities and shareholders' equity
Liabilities and Equity
Variable lease expense
Variable Lease, Cost
Cancellation expense
Share-Based Payment Arrangement, Accelerated Cost
ESOP
Share-Based Payment Arrangement, Option [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table]
Amounts reclassified from accumulated other comprehensive income
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Plan Name [Axis]
Plan Name [Axis]
Tabular List, Table
Tabular List [Table Text Block]
Vesting [Axis]
Vesting [Axis]
Additional paid-in capital
Additional Paid in Capital
Total Shareholders' Equity
Parent [Member]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Entity Address, Country
Entity Address, Country
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Aggregate intrinsic value, awards outstanding
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Schedule of fair value changes of marketable securities
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
Non-current assets
Assets, Noncurrent [Abstract]
General and administrative
General and Administrative Expense
Price per share (USD per share)
Sale of Stock, Price Per Share
Cash flow from financing activities
Cash Flow, Financing Activities, Lessee [Abstract]
Conversion of MoonLake Class C Ordinary Shares into Class A Ordinary Shares
Stock Issued During Period, Value, Conversion of Convertible Securities
Preferred shares, shares authorized (in shares)
Preferred Stock, Shares Authorized
Total commitments not yet recognized
Unrecognized Commitments And Contingencies
Unrecognized Commitments And Contingencies
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Cash paid for interest
Interest Paid, Excluding Capitalized Interest, Operating Activity
Statement of Cash Flows [Abstract]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Pre-Funded Warrant
Pre-Funded Warrant [Member]
Pre-Funded Warrant
Total
Assets, Fair Value Disclosure
Thereafter
Lessee, Operating Lease, Liability, to be Paid, After Year Three
Lessee, Operating Lease, Liability, to be Paid, After Year Three
Name
Measure Name
Income Taxes
Income Tax Disclosure [Text Block]
Pay vs Performance Disclosure [Line Items]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Other non-cash items
Other Noncash Income (Expense)
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Other current assets
Increase (Decrease) in Other Current Assets
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Entity Filer Category
Entity Filer Category
Name
Trading Arrangement, Individual Name
Debt Instrument, Tranche [Axis]
Debt Instrument, Tranche [Axis]
Debt Instrument, Tranche
Cash and cash equivalents
Cash and Cash Equivalent
Tranche 5 Milestone
Tranche 5 Milestone [Member]
Tranche 5 Milestone
Company Selected Measure Amount
Company Selected Measure Amount
Investments, Debt and Equity Securities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Schedule of Stock by Class [Table]
Stock, Class of Stock [Table]
Net loss
Net loss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Public Stock Offering
Public Stock Offering [Member]
Public Stock Offering
Cash flow from investing activities
Cash Flow, Investing Activities, Lessee [Abstract]
Current assets
Assets, Current [Abstract]
Weighted average remaining lease term
Operating Lease, Weighted Average Remaining Lease Term
Non-PEO NEO
Non-PEO NEO [Member]
Entity Address, Address Line One
Entity Address, Address Line One
Non-cash operating lease right-of-use assets obtained in exchange for lease obligations
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Awards vested (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Income tax expense
Income Tax Expense (Benefit)
Excess of current assets less current liabilities
Current Assets In Excess Of Current Liabilities
Current Assets In Excess Of Current Liabilities
Risks and Uncertainties [Abstract]
Adjustments to reconcile net loss to net cash used in operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract]
Other income, net
Other Nonoperating Income
Award Timing Method
Award Timing Method [Text Block]
Consolidation
Consolidation, Policy [Policy Text Block]
Net change in cash, cash equivalents, and restricted cash
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Forecast
Forecast [Member]
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Amortization of unrecognized loss
Defined Benefit Plan, Amortization of Gain (Loss)
Share-Based Payment Arrangement, Tranche Three
Share-Based Payment Arrangement, Tranche Three [Member]
Of which: net loss attributable to controlling interests shareholders
Net loss attributable to controlling interests shareholders
Net Income (Loss) Attributable to Parent
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Statement [Table]
Statement [Table]
Share-Based Payment Arrangement, Tranche Two
Share-Based Payment Arrangement, Tranche Two [Member]
Restatement Determination Date:
Restatement Determination Date [Axis]
Proceeds from options exercised
Proceeds from Stock Options Exercised
Certificates of Deposit
Certificates of Deposit [Member]
Awards exercisable (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Share-Based Payment Arrangement
Share-Based Payment Arrangement [Member]
Basis of Presentation and Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies [Text Block]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Numerator
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]