Discount rates based on industry benchmark, period Industry Benchmark, Discount Rates, Period Industry Benchmark, Discount Rates, Period CHF CHF Positions Switzerland, Francs Items that are or may be reclassified subsequently to profit or loss Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] Disclosure Of Trade And Other Receivables [Line Items] Disclosure Of Trade And Other Receivables [Line Items] Disclosure Of Trade And Other Receivables [Line Items] Number of potentially dilutive shares (in shares) Number of potential ordinary shares that are antidilutive in period presented Statistical Measurement [Domain] Statistical Measurement [Domain] Acquisition of property, plant and equipment Purchase of property, plant and equipment, classified as investing activities Salaries Wages and salaries Current service cost (employer) Increase in net defined benefit liability (asset) resulting from current service cost Novartis Novartis [Member] Novartis Entity File Number Entity File Number 2028 Expiring In 2028 [Member] Expiring In 2028 Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Line Items] Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Line Items] Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments Disclosure Of Detailed Information About Contract Liability [Line Items] Disclosure Of Detailed Information About Contract Liability [Line Items] Disclosure Of Detailed Information About Contract Liability Disclosure of Reconciliation of Changes in Intangible Assets Disclosure of detailed information about intangible assets [text block] Levels of fair value hierarchy [domain] Levels of fair value hierarchy [domain] Total operating expenses Operating expense Non-cash effective pension costs Post-Employment Benefit Expense, 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benefit liability (asset) [axis] Net defined benefit liability (asset) [axis] Number of employees that participated Defined Benefit Plan, Number Of Employees That Participated Defined Benefit Plan, Number Of Employees That Participated Accrued expenses Accrued expenses Current accrued expenses and other current liabilities Co-development Agreement with Orano Med Co-Development Agreement With Orano Med [Member] Co-development Agreement with Orano Med Total shareholders' equity Equity at beginning of period Equity at end of period Equity Equity Entity Addresses, Address Type [Axis] Entity Addresses, Address Type [Axis] Weighted average exercise price of share options forfeited, performance adjustment (in CHF per share) Weighted Average Exercise Price Of Share Options Forfeited In Share-Based Payment Arrangement, Non-Market Performance Conditions Not Achieved Weighted Average Exercise Price Of Share Options Forfeited In Share-Based Payment Arrangement, Non-Market Performance Conditions Not Achieved Disclosure Of Trade And Other Payables [Line Items] Disclosure Of Trade And Other Payables [Line Items] Disclosure Of Trade And Other Payables Social security and tax paid on behalf of employees on shares vested under the PSU and RSU program Adjustments For Social Security And Tax Paid On Employee Shares Vested Adjustments For Social Security And Tax Paid On Employee Shares Vested Basis of consolidation Description Of Accounting Policy For Basis Of Consolidation Policy [Policy Text Block] Description Of Accounting Policy For Basis Of Consolidation Policy Net finance result Finance income (cost) Capital commitments Disclosure of commitments [text block] Ranges of exercise prices for outstanding share options [axis] Ranges of exercise prices for outstanding share options [axis] Number of treasury shares vested under the program (in shares) Number of PSU and RSU exercised (in shares) Number of other equity instruments exercised or vested in share-based payment arrangement Financial Risk Management [Abstract] Financial Risk Management [Abstract] Tax loss carryforwards, expiration period Tax Loss Carryforwards, Expiration Period Tax Loss Carryforwards, Expiration Period Research and development expenses Description of accounting policy for research and development expense [text block] Statement of changes in equity [line items] Statement of changes in equity [line items] Other Other current liabilities Actuarial assumptions, possible increase (decrease) in longevity for most of the age categories Actuarial Assumptions, Possible Increase (Decrease) In Longevity For Most Of The Age Categories Actuarial Assumptions, Possible Increase (Decrease) In Longevity For Most Of The Age Categories Weighted average duration of defined obligation in years at December 31 Weighted average duration of defined benefit obligation Issued in relation to capital raise (in shares) Number Of Shares Issued In Capital Raise, Equity Number Of Shares Issued In Capital Raise, Equity Negative interest on financial assets held at amortized costs Negative Interest Revenue For Financial Assets Measured At Amortised Cost Negative Interest Revenue For Financial Assets Measured At Amortised Cost Total TCHF value, Shares vested under the program Value Of Other Equity Instruments Exercised Or Vested In Share-Based Payment Arrangement Value Of Other Equity Instruments Exercised Or Vested In Share-Based Payment Arrangement Types of contracts [domain] Types of contracts [domain] Items that will not be reclassified to profit or loss Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] Quoted market price Level 1 of fair value hierarchy [member] Royalties and license fees Disclosure Of Royalties And License Fees [Text Block] Disclosure Of Royalties And License Fees Number of share options granted (in shares) Number of share options granted in share-based payment arrangement Disclosure of detailed information about property, plant and equipment [line items] Disclosure of detailed information about property, plant and equipment [line items] Number of PSU and RSU expired (in shares) Number of other equity instruments expired in share-based payment arrangement Financial Instruments [Abstract] Financial Instruments [Abstract] Non-quoted market price Level 2 of fair value hierarchy [member] Disclosure of non-adjusting events after reporting period [abstract] Issuance of Equity Shares [Abstract] Issuance of Equity Shares [Abstract] Trade and other payables Trade and other non-current payables Weighted average exercise price of share options outstanding at beginning of period (in CHF per share) Weighted average exercise price of share options outstanding at end of period (in CHF per share) Weighted average exercise price of share options outstanding in share-based payment arrangement University of Zurich University Of Zurich [Member] University Of Zurich Number of operating segments Number Of Operating 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Arrangement, Tranche One [Member] Vesting Of Share-Based Payment Arrangement, Tranche One Entity Shell Company Entity Shell Company Laboratory equipment: Laboratory Equipment [Member] Laboratory Equipment Document Accounting Standard Document Accounting Standard Social security Current payables on social security and taxes other than income tax Contract liabilities [abstract] Actuarial (gain) / loss on changes in financial assumptions Actuarial gains (losses) arising from changes in financial assumptions, net of tax, defined benefit plans Remeasurement of net pension liabilities Actuarial (gain)/loss on defined benefit obligation Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income Additional paid-in capital Additional paid-in capital [member] Curtailment Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting From Curtailment Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting From Curtailment Total comprehensive result, attributable to shareholders Comprehensive income Statement of changes in equity [abstract] Cumulative losses Retained earnings 2031 Expiring in 2031 [Member] Expiring in 2031 Disclosure of Net Defined Benefit Liability (Asset) Disclosure of net defined benefit liability (asset) [text block] Debt instruments (e.g. bonds) Debt instruments, amount contributed to fair value of plan assets Maximum exposure to credit risk Maximum exposure to credit risk Risk free interest rate, NBI Risk Free Interest Rate, NBI, Other Equity Instruments Granted Risk Free Interest Rate, NBI, Other Equity Instruments Granted Short-term time deposits Short-term deposits, not classified as cash equivalents Disclosure of detailed information about financial instruments [line items] Disclosure of detailed information about financial instruments [line items] Document Fiscal Period Focus Document Fiscal Period Focus Total assets Assets Number of RSU and PSU granted (in shares) Number of other equity instruments granted in share-based payment arrangement Accrued project costs and royalties Current Accrued Project Costs And Royalties Current Accrued Project Costs And Royalties Disclosure Of Detailed Information About Contract Liability [Table] Disclosure Of Detailed Information About Contract Liability [Table] Disclosure Of Detailed Information About Contract Liability Types of risks [domain] Types of risks [domain] Income taxes Description of accounting policy for income tax [text block] VSAO VSAO [Member] VSAO Change in trade and other receivables Adjustments for decrease (increase) in trade and other receivables Legal Entity [Axis] Legal Entity [Axis] Number of PSUs and RSUs outstanding (in shares) Number of PSU and RSU outstanding at beginning of period (in shares) Number of PSU and RSU outstanding at end of period (in shares) Number of other equity instruments outstanding in share-based payment arrangement Credit risk Credit risk [member] Trading Symbol Trading Symbol Average number of full-time equivalents Average Number Of Full-Time Equivalent Employees Average Number Of Full-Time Equivalent Employees Interest paid Interest paid, classified as operating activities Actuarial assumption of discount rates Actuarial assumption of discount rates [member] Molecular Partners Inc. Molecular Partners Inc. [Member] Molecular Partners Inc. Entity Address, City or Town Entity Address, City or Town Segment reporting Description of accounting policy for segment reporting [text block] Number of different Swiss banks Cash Balances Investments, Number Of Different Swiss Banks Cash Balances Investments, Number Of Different Swiss Banks Defined benefit obligation due to reasonably possible increase in actuarial assumption Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption Defined Benefit Obligation Due To Reasonably Possible Increase In Actuarial Assumption Share capital Issued capital [member] Exchange (loss) gain on working capital positions Adjustment For Exchange Gains (Losses) On Working Capital Positions Adjustment For Exchange Gains (Losses) On Working Capital Positions Geographical areas [axis] Geographical areas [axis] Net defined benefit liability (asset) [domain] Net defined benefit liability (asset) [domain] Number of shares authorized, employee participation (in shares) Number Of 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Shares Outstanding Entity Common Stock, Shares Outstanding Reconciliation of net defined benefit liability Changes in net defined benefit liability (asset) [abstract] Intangible assets Intangible assets at beginning of period Intangible assets at end of period Intangible assets other than goodwill Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Total TCHF value, Shares withheld to cover social security and tax liabilities Shares Withheld To Cover Social Security And Tax Liabilities, Value Shares Withheld To Cover Social Security And Tax Liabilities, Value General information Disclosure of general information about financial statements [text block] Disposals Disposals, intangible assets other than goodwill Cash and cash equivalents Cash and cash equivalents at January 1 Cash and cash equivalents at December 31 Cash and cash equivalents Prepayments Current prepaid expenses Document Information [Table] Document Information [Table] Weighted average exercise price of instruments exercised (in CHF per share) Weighted Average Exercise Price Of Instruments Exercised In Share-Based Payment Arrangement Weighted Average Exercise Price Of Instruments Exercised In Share-Based Payment Arrangement Operating expenses Operating Expenses 1 [Abstract] Operating Expenses 1 Pensioners Pensioners [Member] Pensioners Assets Assets [abstract] Pension and share-based compensation costs, non-cash portion Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost Post-Employment Benefit Cost And Share-Based Compensation Cost, Non-Cash Effective Cost Right-of-use assets Right-of-use assets [member] Disclosure of Compensation Costs of Key Management Disclosure of transactions between related parties [text block] Total shareholders' equity and liabilities Equity and liabilities Property, plant and equipment [abstract] thereof property occupied or other assets used by the entity Property Occupied Or Other Assets Used By Entity Included In Fair Value Of Plan Assets Property Occupied Or Other Assets Used By Entity Included In Fair Value Of Plan Assets Potential ordinary share transactions Potential ordinary share transactions [member] Other payables Other current payables Entity Address, Postal Zip Code Entity Address, Postal Zip Code Accrued expenses Disclosure of accrued expenses and other liabilities [text block] Revenues Revenue [abstract] Capital range limit Capital Range Limit Capital Range Limit Disclosure of nature and extent of risks arising from financial instruments [line items] Disclosure of nature and extent of risks arising from financial instruments [line items] Additions Additions other than through business combinations, property, plant and equipment including right-of-use assets Income Taxes Disclosure of income tax [text block] Document Information [Line Items] Document Information [Line Items] Weighted average remaining contractual life of outstanding PSUs and RSUs Weighted Average Remaining Contractual Life Of Outstanding Other Equity Instruments Weighted Average Remaining Contractual Life Of Outstanding Other Equity Instruments Revenue recognition Description of accounting policy for recognition of revenue [text block] Administrative cost excl. cost for managing plan assets Administration costs not reflected in return on plan assets, defined benefit plans Expected volatility on Common shares Expected Volatility On Common Shares, Other Equity Instruments Granted Expected Volatility On Common Shares, Other Equity Instruments Granted Transaction costs on issue of shares Payments for share issue costs Actuarial assumptions Actuarial Assumptions [Abstract] Actuarial Assumptions Disclosure of attribution of expenses by nature to their function [table] Disclosure of attribution of expenses by nature to their function [table] Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits [Line Items] Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits [Line Items] Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits Number of share options expired (in shares) Number of share options expired in share-based payment arrangement Accrued payroll, bonuses and restructuring 2025 Short-term employee benefits accruals Disclosure of Movements in the Number of Share Options Disclosure of number and weighted average exercise prices of share options [text block] Award vesting percentage Award Vesting Percentage Of Share-Based Payment Arrangement Award Vesting Percentage Of Share-Based Payment Arrangement Capital commitments [abstract] Payments of restructuring activities Payments Of Restructuring Activities Payments Of Restructuring Activities Interest rate risk Interest rate risk [member] City Area Code City Area Code Software Computer software [member] Lease extension Increase Through New Leases And Lease Extension, Operating Leases Increase Through New Leases And Lease Extension, Operating Leases Facility expenses Occupancy expense Disclosure of net defined benefit liability (asset) [table] Disclosure of net defined benefit liability (asset) [table] USD USD Positions United States of America, Dollars Applicable estimated useful lives, property, plant and equipment Useful life measured as period of time, property, plant and equipment Disclosure of Timing of Revenue Recognition by Type of Payments Received Disclosure Of Timing Of Revenue Recognition By Type Of Payments Received [Table Text Block] Disclosure Of Timing Of Revenue Recognition By Type Of Payments Received Related party transactions [abstract] Categories of financial liabilities [domain] Categories of financial liabilities [domain] More than 5 years Later than five years [member] Individuals [Axis] Individuals [Axis] Individuals Related party disclosures Disclosure of related party [text block] Number of instruments granted (in shares) Number of instruments granted in share-based payment arrangement Classes of financial assets [domain] Classes of financial assets [domain] Contributions by plan participants Contributions by plan participants Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan by plan participants Intangible assets Disclosure of intangible assets [text block] Basis of preparation Statement of IFRS compliance [text block] Weighted average exercise price of PSU and RSU expired (in CHF per share) Weighted average exercise price of other equity instruments expired in share-based payment arrangement Value added tax Current value added tax receivables Cash and cash equivalents Description of accounting policy for determining components of cash and cash equivalents [text block] Disposals Disposals, property, plant and equipment including right-of-use assets Increase in exchange rates Increase in interest rates Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Percent Interest expense on leases Recognition of interest on lease liabilities Interest expense on lease liabilities Interest expense on lease liabilities Accounting estimates and judgments Disclosure of accounting judgements and estimates [text block] Share-based compensation costs Increase (decrease) through share-based payment transactions, equity Lease liabilities [abstract] Lease liabilities [abstract] Entity Ex Transition Period Entity Ex Transition Period Performance Share Units (PSU) Performance Share Units (PSU) [Member] Performance Share Units (PSU) Research and development expenses Research And Development Expense 1 [Member] Research And Development Expense 1 Disclosure of classes of share capital [table] Disclosure of classes of share capital [table] Exchange differences on translating foreign operations Exchange differences on translating foreign operations Other comprehensive income, net of tax, exchange differences on translation of foreign operations Total non-current assets Non-current assets Auditor Name Auditor Name Curtailment Curtailment Gain (Loss), Defined Benefit Plans Curtailment Gain (Loss), Defined Benefit Plans Change in accrued expenses Adjustments For Increase (Decrease) In Accrued Expenses Adjustments For Increase (Decrease) In Accrued Expenses Weighted average exercise price of instruments forfeited (in CHF per share) Weighted Average Exercise Price Of Instruments Forfeited In Share-Based Payment Arrangement Weighted Average Exercise Price Of Instruments Forfeited In Share-Based Payment Arrangement American depositary shares (each representing one ordinary share, CHF 0.10 nominal value per share) American Depository Shares, The Nasdaq Stock Market LLC [Member] American Depository Shares, The Nasdaq Stock Market LLC Classes of property, plant and equipment [axis] Classes of property, plant and equipment [axis] Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of disaggregation of revenue from contracts with customers [line items] Classes of property, plant and equipment [domain] Classes of property, plant and equipment [domain] Reasonably possible increase in actuarial assumptions, period Reasonably Possible Increase In Actuarial Assumptions, Period Reasonably Possible Increase In Actuarial Assumptions, Period Actuarial assumptions [domain] Actuarial assumptions [domain] Novartis AG, Switzerland License And Collaboration Agreement With Novartis AG [Member] License And Collaboration Agreement With Novartis AG Entity Address, Country Entity Address, Country Trade and other receivables Disclosure of trade and other receivables [text block] Number of votes per share Number Of Votes Per Share Number Of Votes Per Share Effect on result before tax if interest rates decrease Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Effect On Result Before Tax Conditional share capital Conditional Share Capital [Member] Conditional Share Capital EUR EUR Positions Euro Member Countries, Euro Number of positions eliminated Restructuring Activities, Number of Positions Eliminated Restructuring Activities, Number of Positions Eliminated Disclosure of Detailed Information about Trade and Other Payables Disclosure Of Detailed Information About Trade And Other Payables [Table Text Block] Disclosure Of Detailed Information About Trade And Other Payables Exchange (loss) gain on cash positions Effect of exchange rate changes on cash and cash equivalents Interest received Interest received, classified as investing activities Foreign currency translation / transactions Description of accounting policy for foreign currency translation [text block] Short-term time deposits Description Of Accounting Policy For Short Term Deposits [Text Block] Description Of Accounting Policy For Short Term Deposits Net cash (used in) from operating activities Cash flows from (used in) operating activities Number of PSU and RSU forfeited (in shares) Number of other equity instruments forfeited in share-based payment arrangement Disclosure of terms and conditions of share-based payment arrangement [line items] Disclosure of terms and conditions of share-based payment arrangement [line items] Document Annual Report Document Annual Report Withholding tax Current receivables from taxes other than income tax Disclosure of Expiry of Tax Loss Carryforwards Disclosure Of Expiry Of Tax Loss Carryforwards [Table Text Block] Disclosure Of Expiry Of Tax Loss Carryforwards Entity [Domain] Entity [Domain] Percentage of reasonably possible increase in actuarial assumption Percentage of reasonably possible increase in actuarial assumption Return on plan assets excl. interest income Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense Non-current contract liabilities Non-current contract liabilities Full contractual life for RSU and PSU Full Contractual Life, Other Equity Instruments Full Contractual Life, Other Equity Instruments Full-time equivalents at year end Number Of Full-Time Equivalent Employees Number Of Full-Time Equivalent Employees Disclosure of detailed information about financial instruments [table] Disclosure of detailed information about financial instruments [table] Number of instruments expired (in shares) Number Of Instruments Expired In Share-Based Payment Arrangement Number Of Instruments Expired In Share-Based Payment Arrangement Geographical areas [domain] Geographical areas [domain] Lease, term Lease, Term Of Contract Lease, Term Of Contract Revenue and entity-wide disclosures Disclosure of revenue [text block] Document Fiscal Year Focus Document Fiscal Year Focus Trade and other receivables Trade and other receivables Trade and other current receivables Authorized share capital, employee participation Authorized Share Capital, Employee Participation Authorized Share Capital, Employee Participation Adjustments for: Adjustments to reconcile profit (loss) [abstract] Financial risk management Disclosure of financial risk management [text block] Disclosure of Accrued Expenses Explanatory Disclosure Of Current Accrued Expenses And Other Current Liabilities Explanatory [Table Text Block] Disclosure Of Current Accrued Expenses And Other Current Liabilities Explanatory Entity Interactive Data Current Entity Interactive Data Current Investments in short-term time deposits Purchase Of Investments In Short-Term Time Deposits, Classified As Investing Activities Purchase Of Investments In Short-Term Time Deposits, Classified As Investing Activities Disclosure of maturity analysis of operating lease payments [table] Disclosure of maturity analysis of operating lease payments [table] Disclosure of attribution of expenses by nature to their function [line items] Disclosure of attribution of expenses by nature to their function [line items] Levels of fair value hierarchy [axis] Levels of fair value hierarchy [axis] Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits [Line Items] Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits [Line Items] Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits Financial expenses Finance costs Finance costs Disclosure of Financial Assets at Amortized Cost Disclosure of financial assets [text block] Income tax Adjustments for income tax expense Number of instruments forfeited (in shares) Number Of Instruments Forfeited In Share-Based Payment Arrangement Number Of Instruments Forfeited In Share-Based Payment Arrangement Actuarial assumption of life expectancy Actuarial assumption of life expectancy after retirement [member] Disclosure of credit risk exposure [table] Disclosure of credit risk exposure [table] Expected volatility on SPI Expected Volatility On SPI, Other Equity Instruments Granted Expected Volatility On SPI, Other Equity Instruments Granted Summary of material accounting policies Disclosure of material accounting policy information [text block] Restricted Share Units (RSU) Restricted Share Units (RSU) [Member] Restricted Share Units (RSU) Past service cost Past service cost, defined benefit plans Leasehold improvements Leasehold improvements [member] New or revised IFRS standards and interpretations Disclosure of expected impact of initial application of new standards or interpretations [text block] Increase (decrease) in number of shares outstanding Increase (decrease) in number of shares outstanding Financial liabilities at amortized costs Description of accounting policy for financial liabilities [text block] Trade payables Current trade payables Sensitivity Analysis to Reasonable Possible Change in Exchange Rates and Interest Rates Sensitivity analysis for types of market risk [text block] Key management personnel compensation costs Key management personnel compensation Entity Central Index Key Entity Central Index Key Non-cash cost for share-based payments Expense from share-based payment transactions with parties other than employees Disclosure of Exercise Prices, Number and Weighted Average Remaining Contractual Life of Outstanding Instruments Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Table Text Block] Disclosure Of Exercise Price, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments Other financial expenses Other finance cost Trade payables Trade Payables [Member] Trade Payables Number of share options outstanding at beginning of period (in shares) Number of share options outstanding at end of period (in shares) Number of share options outstanding in share-based payment arrangement Disclosure of credit risk exposure [line items] Disclosure of credit risk exposure [line items] Ordinary shares, CHF 0.10 nominal value per share Common shares Ordinary shares [member] Trade receivables Current trade receivables Number of share options forfeited, performance adjustment (in shares) Number Of Share Options Forfeited In Share-Based Payment Arrangement, Non-Market Performance Conditions Not Achieved Number Of Share Options Forfeited In Share-Based Payment Arrangement, Non-Market Performance Conditions Not Achieved Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits [Table] Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits [Table] Disclosure Of Detailed Information About Cash, Cash Equivalents And Short-Term Time Deposits Earnings per share Disclosure of earnings per share [text block] Cost Gross carrying amount [member] Trade and other payables Trade and other payables Trade and other current payables Shareholders' equity and liabilities Equity and liabilities [abstract] Applicable tax rate Applicable tax rate Number of shares authorized, financing transactions (in shares) Number Of Shares Authorized, Financing Transactions Number Of Shares Authorized, Financing Transactions Other research and development expenses Other Research And Development Expense 1 Other Research And Development Expense 1 Financial expenses Adjustments for finance costs Disclosure of Reconciliation of Cash, Cash Equivalents and Short-Term Time Deposits Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits [Table Text Block] Disclosure Of Reconciliation Of Cash, Cash Equivalents And Short-Term Time Deposits Entity Filer Category Entity Filer Category Lease Facilities, Schlieren Lease Facilities, Schlieren [Member] Lease Facilities, Schlieren Local Phone Number Local Phone Number Defined benefit obligation due to reasonably possible decrease in actuarial assumption Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption Defined Benefit Obligation Due To Reasonably Possible Decrease In Actuarial Assumption Proceeds from issuance of new shares Proceeds from issuing shares Between 2 and 5 years Later than two years and not later than five years [member] Less than 1 year Not later than one year [member] Actuarial (gain)/loss on defined benefit obligation Actuarial Gains (Losses), Net Of Tax, Defined Benefit Plans Actuarial Gains (Losses), Net Of Tax, Defined Benefit Plans Effect on result before tax if exchange rates increase Effect on result before tax if interest rates increase Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Effect On Result Before Tax Other current assets Disclosure Of Prepaid Expenses And Accrued Income [Text Block] Disclosure Of Prepaid Expenses And Accrued Income Expected dividend Expected Dividend, Other Equity Instruments Granted Expected Dividend, Other Equity Instruments Granted Interest expenses on defined benefit obligation Interest income on plan assets Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) Plan asset classes Classes of plan assets, fair value monetary amounts [abstract] Disclosure Of General Information [Abstract] Disclosure Of General Information [Abstract] Disclosure Of Detailed Information About Royalties And License Fees [Line Items] Disclosure Of Detailed Information About Royalties And License Fees [Line Items] Disclosure Of Detailed Information About Royalties And License Fees Operating result Profit (loss) from operating activities Other receivables Other current receivables Events after the balance sheet date Disclosure of non-adjusting events after reporting period [text block] Number of instruments exercised (in shares) Number Of Instruments Exercised In Share-Based Payment Arrangement Number Of Instruments Exercised In Share-Based Payment Arrangement Royalties, minimum amount required to pay in total Royalties, Minimum Annual Amount, Total Royalties, Minimum Annual Amount, Total Entity Address, Address Line One Entity Address, Address Line One Property, plant and equipment Property, plant and equipment [member] Property, plant and equipment Description of accounting policy for property, plant and equipment [text block] Reconciliation of fair value of plan assets Reconciliation Of Fair Value Of Plan Assets [Abstract] Reconciliation Of Fair Value Of Plan Assets Leases Disclosure of leases [text block] Disclosure of Movement of Lease Liabilities Disclosure Of Movement Of Lease Liabilities [Table Text Block] Disclosure Of Movement Of Lease Liabilities Payment of lease liabilities Payments of lease liabilities, classified as financing activities thereof net interest expense on the net defined benefit liability Interest expense (income), defined benefit plans Entity Voluntary Filers Entity Voluntary Filers Additional paid-in capital Additional paid-in capital Change in employee benefits Adjustments for increase (decrease) in employee benefit liabilities Weighted average exercise price of PSU and RSU forfeited (in CHF per share) Weighted average exercise price of other equity instruments forfeited in share-based payment arrangement Accrued sabbatical cost Accrued Sabbatical Cost Accrued Sabbatical Cost Entity Registrant Name Entity Registrant Name Number of PSUs issued, in percentage of number of PSUs granted Number Of Other Equity Instruments Issued In Share-Based Payment Arrangement, In Percentage Of Number Granted Number Of Other Equity Instruments Issued In Percentage Of Number Granted Basic net result per share (in CHF per share) Basic earnings (loss) per share Decrease through performance obligation being satisfied, contract liabilities Decrease through performance obligation being satisfied, contract liabilities Contributions by the employer Estimate of contributions expected to be paid to plan for next annual reporting period Statement of cash flows [abstract] Weighted average number of shares used in computing diluted earnings per share (in shares) Weighted average number of ordinary shares used in calculating diluted earnings per share Actuarial assumption of interest rate on retirement savings capital Actuarial Assumption Of Interest Rate On Retirement Savings Capital [Member] Actuarial Assumption Of Interest Rate On Retirement Savings Capital Other financial expense Other inflows (outflows) of cash, classified as operating activities Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Table] Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments [Table] Disclosure Of Exercise Prices, Number And Weighted Average Remaining Contractual Life Of Outstanding Instruments Disclosure of Expenses Recognised in Profit or Loss Disclosure of additional information about leasing activities for lessee [text block] Reasonably possible decrease in actuarial assumptions, period Reasonably Possible Decrease In Actuarial Assumptions, Period Reasonably Possible Decrease In Actuarial Assumptions, Period Interest income on financial assets held at amortized costs Interest revenue for financial assets measured at amortised cost Equity instruments Equity instruments, amount contributed to fair value of plan assets Disclosure Of Detailed Information About Leases [Table] Disclosure Of Detailed Information About Leases [Table] Disclosure Of Detailed Information About Leases [Table] Vesting Of Share-Based Payment Arrangement, Tranche Two Vesting Of Share-Based Payment Arrangement, Tranche Two [Member] Vesting Of Share-Based Payment Arrangement, Tranche Two Actuarial (gain) / loss on changes in 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