Loss before income tax Accounting profit Deferred income [Abstract] Accumulated Depreciation [Member] Accumulated depreciation and amortisation [member] Discount rate Actuarial assumption of discount rates Discount Rate [Member] Actuarial assumption of discount rates [member] Rate of future increase in current pensions Actuarial assumption of expected rates of pension increases Future Pension Cost [Member] Actuarial assumption of expected rates of pension increases [member] Rate of future increase in compensations Actuarial assumption of expected rates of salary increases Future Salary Increase [Member] Actuarial assumption of expected rates of salary increases [member] Actuarial assumptions [axis] Actuarial assumptions [member] Effect of changes in demographic assumptions Change in demographic assumptions Effect of changes in financial assumptions Change in financial assumptions Effect of changes in experience assumptions Change in experience assumptions Acquisitions Additions other than through business combinations, property, plant and equipment Weighted-average number of shares used to compute EPS basic and diluted (in shares) Diluted (in shares) Basic and diluted (in shares) Decrease/(increase) in other current receivables Adjustments for decrease (increase) in other operating receivables Depreciation of property, plant and equipment Adjustments for depreciation expense Finance result, net Adjustments for finance income (cost) Decrease/(increase) in deferred income Adjustments for increase (decrease) in deferred income Changes in net employee defined benefit liability Adjustments for increase (decrease) in employee benefit liabilities Increase/(decrease) in trade and other payables Adjustments for increase (decrease) in trade accounts payable Adjustments to reconcile net income for the period to net cash flows: Adjustments to reconcile profit (loss) [abstract] Share-based compensation expense Adjustments for share-based payments Aggregated time bands [member] Corporate tax rate Applicable tax rate Total assets Assets Assets Assets [abstract] Basic and diluted, income / (loss) for the period attributable to equity holders (in CHF per share) Basic and diluted (in CHF per share) Basic and diluted earnings (loss) per share Basic (in CHF per share) Basic earnings (loss) per share Debt obligation [Abstract] Borrowings [abstract] Borrowings by name [axis] Borrowings by name [member] Interest rate Bottom of Range [Member] Bottom of range [member] Carrying amount, accumulated depreciation, amortization and impairment and gross carrying amount [axis] Carrying amount [member] Cash and cash equivalents [Abstract] Cash [abstract] Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Company's cash position Net cash flows provided by financing activities Cash flows from (used in) financing activities Financing activities Cash flows from (used in) financing activities [abstract] Net cash flows used in investing activities Cash flows from (used in) investing activities Investing activities Cash flows from (used in) investing activities [abstract] Net cash flows used in operating activities Cash flows from (used in) operating activities Operating activities Cash flows from (used in) operating activities [abstract] Cash used in operating activities Cash flows from (used in) operations Categories of financial assets [axis] Categories of financial liabilities [axis] Categories of related parties [axis] Share capital [Abstract] Change in net defined benefit liability [Abstract] Changes in defined benefit obligation [Abstract] Changes in net defined benefit liability (asset) [abstract] Classes of property, plant and equipment [axis] Classes of share capital [axis] Share capital [member] Share Capital [member] Translation rate into CHF Closing foreign exchange rate Components of equity [axis] Other comprehensive loss not to be reclassified to income or loss in subsequent periods (net of tax) Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] Total comprehensive loss, net of tax Comprehensive income Computers / IT [Member] IT Equipment [Member] Up-front consideration received Contract liabilities Employer's contribution Employer's contributions Contributions to plan by employer, net defined benefit liability (asset) Employees' contributions Contributions to plan by plan participants, net defined benefit liability (asset) Credit Risk [Member] Credit risk [member] Foreign Currency Exchange Risk [Member] Currency risk [member] Accrued expenses Current accrued expenses and other current liabilities Total current assets Current assets Current assets Current assets [abstract] Accrued income Accrued income, ending balance Accrued income, beginning balance Current contract assets Deferred income Deferred income, ending balance Deferred income, beginning balance Current contract liabilities Short-term financial assets Short-term financial assets due in one year or less Short-term debt obligation Total current liabilities Current liabilities Current liabilities Current liabilities [abstract] Prepaid expenses Current prepayments Total Current prepayments and current accrued income Accrued payroll expenses Current provisions for employee benefits Withholding tax Current receivables from taxes other than income tax Service cost Service cost Current service cost, net defined benefit liability (asset) Swiss VAT Current value added tax receivables Deferred tax assets Unrecognized deductible temporary differences, unused tax losses and unused tax credits Deferred tax liabilities Unused tax losses and tax credits Deferred tax liability (asset) Defined benefit obligation Defined benefit obligation, at present value Defined benefit plans [axis] Defined benefit plans [member] Defined Benefit Plan [Member] Defined benefit plans that share risks between entities under common control [member] Depreciation expense Depreciation, property, plant and equipment Earnings per share Description of accounting policy for earnings per share [text block] Employee benefits Description of accounting policy for employee benefits [text block] Foreign currency transactions Description of accounting policy for foreign currency translation [text block] Taxation Description of accounting policy for income tax [text block] Share capital and public offering Description of accounting policy for issued capital [text block] Property, plant and equipment Description of accounting policy for property, plant and equipment [text block] Provisions Description of accounting policy for provisions [text block] Revenue recognition Description of accounting policy for recognition of revenue [text block] Research and development services Description of accounting policy for research and development expense [text block] Segment reporting Description of accounting policy for segment reporting [text block] Accounting pronouncements - not yet adopted [Abstract] Disclosure of expected impact of initial application of new standards or interpretations [abstract] Disclosure of expected impact of initial application of new standards or interpretations [line items] Disclosure of expected impact of initial application of new standards or interpretations [table] Expected volatility Expected volatility, share options granted Expected term Option life, share options granted Risk free interest rate Risk free interest rate, share options granted Diluted (in CHF per share) Diluted earnings (loss) per share Total (in shares) Dilutive effect of share options on number of ordinary shares Key management compensation Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [text block] Basis of preparation Disclosure of basis of preparation of financial statements [text block] Capital structure [Abstract] Summary of capital structure Disclosure of classes of share capital [text block] Disclosure of classes of share capital [line items] Disclosure of classes of share capital [table] Commitments and contingencies Disclosure of commitments and contingent liabilities [text block] Maturity of commitments and contingencies Disclosure of contingent liabilities [text block] Debt obligation Disclosure of debt instruments [text block] Retirement benefit plan [Abstract] Property, plant and equipment Disclosure of detailed information about property, plant and equipment [text block] Revenues [Abstract] Disclosure of disaggregation of revenue from contracts with customers [abstract] Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of disaggregation of revenue from contracts with customers [table] Earnings per share Disclosure of earnings per share [text block] Retirement benefit plan Disclosure of employee benefits [text block] Post balance sheet events Disclosure of events after reporting period [text block] Expenses by category Disclosure of expenses [text block] Changes in defined benefit obligation, fair value of plan assets and unrecognized (gains) / losses Disclosure of fair value of plan assets [text block] Financial Result, net Cash and cash equivalents and financial assets [Abstract] Cash and cash equivalents and short-term financial assets Financial instruments and risk management Disclosure of financial risk management [text block] General and Administrative Disclosure of general and administrative expense [text block] Income taxes Summary of significant accounting policies [Abstract] Financial instruments and risk management [Abstract] Disclosure of nature and extent of risks arising from financial instruments [line items] Disclosure of nature and extent of risks arising from financial instruments [table] Defined benefit pension plan amounts recognized in the balance sheet and statement of income Disclosure of net defined benefit liability (asset) [text block] Disclosure of net defined benefit liability (asset) [line items] Disclosure of net defined benefit liability (asset) [table] Post balance sheet events [Abstract] Disclosure of non-adjusting events after reporting period [abstract] Disclosure of non-adjusting events after reporting period [line items] Disclosure of non-adjusting events after reporting period [table] Summary of non-vested share awards (restricted share and restricted share units) Disclosure of number and weighted average exercise prices of other equity instruments [text block] Number and weighted average exercise prices of options under share option programs Disclosure of number and weighted average exercise prices of share options [text block] Number and weighted average exercise prices of options under the share option programs [Abstract] Disclosure of number and weighted average remaining contractual life of outstanding share options [abstract] Outstanding options, exercise price range and expiry dates Disclosure of number and weighted average remaining contractual life of outstanding share options [text block] Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] Disclosure of number and weighted average remaining contractual life of outstanding share options [table] Capital risk management [Abstract] Capital risk management Disclosure of objectives, policies and processes for managing capital [text block] Segment reporting [Abstract] Disclosure of operating segments [abstract] Property, plant and equipment [Abstract] Property, plant and equipment Disclosure of property, plant and equipment [text block] Disclosure of detailed information about property, plant and equipment [line items] Disclosure of detailed information about property, plant and equipment [table] Weighted-average assumptions Disclosure of range of exercise prices of outstanding share options [text block] Disclosure of range of exercise prices of outstanding share options [line items] Disclosure of range of exercise prices of outstanding share options [table] Related-party transactions Disclosure of related party [text block] Research and Development Disclosure of research and development expense [text block] Cash and cash equivalents and financial assets Revenues Disclosure of revenue [text block] Revenues Disclosure of revenue from contracts with customers [text block] Actuarial assumptions [Abstract] Disclosure of sensitivity analysis for actuarial assumptions [abstract] Actuarial assumptions and sensitivity analysis Disclosure of sensitivity analysis for actuarial assumptions [text block] Disclosure of sensitivity analysis for actuarial assumptions [line items] Disclosure of sensitivity analysis for actuarial assumptions [table] Share capital Disclosure of share capital, reserves and other equity interest [text block] Share-based compensation Disclosure of share-based payment arrangements [text block] Summary of significant accounting policies Disclosure of significant accounting policies [text block] Unrecognized deductible temporary differences, unused tax losses and unused tax credits [Abstract] Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] Unrecognized deductible temporary differences, unused tax losses and unused tax credits Disclosure of temporary difference, unused tax losses and unused tax credits [text block] Disclosure of temporary difference, unused tax losses and unused tax credits [line items] Disclosure of temporary difference, unused tax losses and unused tax credits [table] Share-based compensation [Abstract] Share-based compensation plans outstanding Disclosure of terms and conditions of share-based payment arrangement [text block] Disclosure of terms and conditions of share-based payment arrangement [line items] Disclosure of terms and conditions of share-based payment arrangement [table] Trade payables and accrued liabilities Disclosure of trade and other payables [text block] Related-party transactions [Abstract] Disposals Disposals, property, plant and equipment Dividends paid Loss per share (EPS): Earnings per share [Abstract] Net income/(loss) per share (EPS) [Abstract] Earnings per share Earnings per share [text block] Exchange gains on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Entity's total for related parties [member] Total shareholders' equity Balance, beginning of period Balance, end of period Equity Shareholders' equity Total shareholders' equity and liabilities Equity and liabilities SHAREHOLDERS' EQUITY AND LIABILITIES Equity [Member] Exercise price (in CHF/USD per share) Dividend yield Expense charged against the income statement Expense from share-based payment transactions with employees Changes in Contract Assets and Contract Liabilities Finance costs Finance costs paid, classified as operating activities Finance result, net Finance result, net Finance income (cost) Interest income Finance income received, classified as operating activities Financial assets Financial assets, category [member] Financial liabilities Financial liabilities, category [member] Furniture [Member] Re-measurement through other comprehensive loss Gain (loss) on remeasurement, net defined benefit liability (asset) Foreign currency remeasurement gain/(loss), net Gain (loss) in finance income/(expense), net Foreign exchange gain (loss) Acquisition Cost [Member] Write off of fixed assets Impairment loss recognised in profit or loss, property, plant and equipment Statements of Loss [Abstract] Income tax expense Effective income tax rate benefit / (expense) Tax expense (income) Income tax expense Income tax relating to remeasurements of defined benefit plans included in other comprehensive income Net increase/(decrease) in cash and cash equivalents Net increase/(decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents Increase in tax losses available as an offset Impact on the net defined benefit obligation Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption Impact on the net defined benefit obligation Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption Net pension cost Increase (decrease) in net defined benefit liability (asset) Shares issued (in shares) Increase (decrease) in number of ordinary shares issued Exercise of options Increase (decrease) through exercise of options, equity Share-based payments Increase (decrease) through share-based payment transactions, equity Incremental fair value amount Incremental fair value granted, modified share-based payment arrangements Interest expense Interest expense Interest Rate [member] Interest rate risk [member] Interest income/ (expense) Share capital Issued capital Share Capital [Member] Issued capital [member] Total Key management personnel compensation Post-employment benefits Share-based compensation Short-term employee benefits Executives and Directors [Member] More Than Five Years [Member] Loss Expiry, December 31, 2022 [Member] Later than four years and not later than five years [member] Between One and Three Years [Member] Loss Expiry, December 31, 2019 [Member] Later than one year and not later than two years [member] Between Three and Five Years [Member] Loss Expiry, December 31, 2021 [Member] Later than three years and not later than four years [member] Loss Expiry, December 31, 2020 [Member] Later than two years and not later than three years [member] Lease liabilities Rental contracts amount Leasehold Improvements [Member] Total liabilities Liabilities Defined benefit obligation Net defined benefit liabilities, end of period Net defined benefit liabilities, beginning of period Defined benefit obligation, beginning of period Defined benefit obligation, end of period Net defined benefit liability (asset) Liquidity Risk [Member] Liquidity risk [member] Income taxes [Abstract] Income taxes [Abstract] Maturity [axis] Net defined benefit liability (asset) [axis] Net defined benefit liability (asset) [member] New IFRSs [axis] New IFRSs [member] Non-adjusting events after reporting period [axis] Non-adjusting events after reporting period [member] Total non-current assets Non-current assets Non-current assets Non-current assets [abstract] Long-term debt obligation Long-term debt obligation Total non-current liabilities Non-current liabilities Non-current liabilities Non-current liabilities [abstract] Finance receivable Finance receivable Net employee defined benefit liabilities Non-current provisions for employee benefits Deposits in escrow accounts Long-term financial assets Loss Expiry, December 31, 2018 [Member] Within One Year [Member] 2019 [Member] Granted during the year (in shares) Number of non-vested share awards granted (in shares) Number of other equity instruments granted in share-based payment arrangement Vested during the year Number of other equity instruments exercised or vested in share-based payment arrangement Forfeited during the year (in shares) Number of other equity instruments forfeited in share-based payment arrangement Non-vested (in shares) Non-vested (in shares) Number of other equity instruments outstanding in share-based payment arrangement Outstanding Options (in shares) Outstanding at end of period (in shares) Outstanding at beginning of period (in shares) Exercisable (in shares) Number of share options exercisable in share-based payment arrangement Exercised during the year (in shares) Number of share options exercised in share-based payment arrangement Cancelled during the year (in shares) Number of share options expired in share-based payment arrangement Forfeited during the year (in shares) Number of share options forfeited in share-based payment arrangement Number of options awarded (in shares) Granted during the year (in shares) Issuance of shares: Balance, beginning of period (in shares) Balance, end of period (in shares) Number of shares outstanding Total operating expenses Operating expense Common Shares [Member] Ordinary shares [member] Other comprehensive loss Other comprehensive income Re-measurement losses on defined benefit plans (net of tax of CHF 0 for all periods) Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans Other accrued expenses Other current liabilities Other receivables Other current receivables Other finance income/(expense) Nominal value per share (in CHF per share) Par value per share Net pension cost through statement of income Past service cost and gains (losses) arising from settlements, net defined benefit liability (asset) Transaction costs on public offerings of common shares Payments for share issue costs Benefit payments Benefits payments Payments from plan, net defined benefit liability (asset) Percentage of contract revenues Percentage of entity's revenue Percentage decrease in actuarial assumption Percentage of reasonably possible decrease in actuarial assumption Percentage increase in actuarial assumption Percentage of reasonably possible increase in actuarial assumption Fair value of plan assets, end of period Fair value of plan assets Fair value of plan assets, beginning of period Plan assets, at fair value Fair Value of Plan Assets [Member] Plan assets [member] Expected contribution by employer to be paid to post-retirement benefit plans Preferred Shares [Member] Preferred Shares [Member] Prepaid expenses and accrued income [Abstract] Defined Benefit Obligation [Member] Present value of defined benefit obligation [member] Proceeds from long-term debt obligation Consideration received Proceeds from issuance of common shares Proceeds from exercise of options Gross proceeds received Proceeds from issue of ordinary shares Proceeds from issuance of preferred Series E Proceeds from issue of preference shares Short-term financial assets Proceeds from sales of investments other than investments accounted for using equity method Products and services [axis] Products and services [member] Loss for the period Net loss for the period Net income / (loss) attributable to owners of the Company Profit (loss) Earnings per share (EPS) [Abstract] Profit (loss), attributable to ordinary equity holders of parent entity [abstract] Loss before tax Profit (loss) before tax Operating loss Profit (loss) from operating activities Property, plant and equipment Property, plant and equipment, beginning of period Property, plant and equipment, end of period Property, plant and equipment [member] Commitments Provisions Purchases of property, plant and equipment Purchase of property, plant and equipment, classified as investing activities Range [axis] Ranges [member] Ranges of exercise prices for outstanding share options [axis] Ranges of exercise prices for outstanding share options [member] Income tax expense reconciled to Income / (loss) [Abstract] Reconciliation of accounting profit multiplied by applicable tax rates [abstract] Property, plant and equipment [Abstract] Reconciliation of changes in property, plant and equipment [abstract] Rent expense Rental expense Repayment of short-term debt obligation Repayments of current borrowings Research & development expenses Total research and development expenses Research and development expense Accumulated losses Retained earnings Accumulated Losses [Member] Retained earnings [member] Plan assets gains/(losses) Plan assets gains/(losses) Total revenue Revenue Revenues Revenues [Abstract] Contract revenue Total contract revenue Recognized revenues Interest income Amounts included in the contract liability at the beginning of the period Right-of-use assets General & administrative expenses Total general and administrative expenses Selling, general and administrative expense General and Administration [Abstract] Selling, general and administrative expense [abstract] Transaction costs Net underwriting fees and transaction costs Share issue related cost Share premium Share Premium [Member] Share-based payment arrangements [member] Accrual of performance-related remuneration Short-term employee benefits accruals Statements of Cash Flows [Abstract] Statements of Changes in Equity [Abstract] Statement of changes in equity [line items] Statement of changes in equity [table] Statements of Comprehensive Loss [Abstract] Balance Sheets [Abstract] Total liability Surplus (deficit) in plan Defined benefit pension plan amount recognized in balance sheet [Abstract] Surplus (deficit) in plan [abstract] Effect of unrecognized carry forward tax loss Tax benefit arising from previously unrecognised tax loss, tax credit or temporary difference of prior period used to reduce current tax expense Effect of unused tax losses and tax offsets not recognized as deferred tax assets Tax benefit arising from previously unrecognised tax loss, tax credit or temporary difference of prior period used to reduce deferred tax expense Permanent differences Tax effect of revenues exempt from taxation Tax benefit calculated at the statutory rate of 20.6% (20.5% for 2017 and 21% for 2016) Temporary difference, unused tax losses and unused tax credits [axis] Temporary difference, unused tax losses and unused tax credits [member] Top of Range [Member] Top of range [member] Trade and other payables Trade and other payables Trade and other current payables Trade payables, accrued liabilities and deferred income [Abstract] Other current receivables [abstract] Trade and other receivables [abstract] Total potential collaboration agreement value remaining Transaction price allocated to remaining performance obligations Types of contracts [axis] Types of contracts [member] Types of risks [axis] Risks [member] Types of share-based payment arrangements [axis] Deductible Temporary Differences Related to the Retirement Benefit Plan [Member] Unused tax credits [member] Unused tax losses Unused tax losses for which no deferred tax asset recognised Tax Losses [Member] Unused tax losses [member] Useful lives or depreciation rates, property, plant and equipment Weighted average duration period for defined benefit obligation Weighted average duration of defined benefit obligation Vested during the year (in CHF per share) Weighted average exercise price of other equity instruments exercised or vested in share-based payment arrangement Forfeited during the year (in CHF per share) Weighted average exercise price of other equity instruments forfeited in share-based payment arrangement Granted during the year (in CHF per share) Weighted average exercise price of other equity instruments granted in share-based payment arrangement Non-vested (in CHF per share) Non-vested (in CHF per share) Weighted average exercise price of other equity instruments outstanding in share-based payment arrangement Exercisable (in CHF per share) Weighted average exercise price of share options exercisable in share-based payment arrangement Exercised during the year (in CHF per share) Cancelled during the year (in CHF per share) Forfeited during the year (in CHF per share) Weighted average exercise price for options granted (in CHF/USD per share) Granted during the year (in CHF per share) Weighted average share price of common share options exercised (in dollars per share) Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise Outstanding at beginning of period (in CHF per share) Outstanding at end of period (in CHF per share) Weighted average exercise price of share options outstanding in share-based payment arrangement Grant date fair value of the replacement award Weighted average fair value at measurement date, share options granted Weighted average remaining term (years) Weighted average remaining contractual life of outstanding share options Share Price, weighted average (in CHF/USD per share) Weighted average share price Weighted average fair value, options granted (in CHF/USD per share) Weighted average share price, share options granted Basic (in shares) Weighted average number of ordinary shares outstanding Weighted-average number of shares used to compute EPS [Abstract] Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Entity Shell Company Entity Emerging Growth Company Entity Ex Transition Period Entity Small Business CHF [Member] Switzerland, Francs EUR [Member] Euro Member Countries, Euro USD [Member] United States of America, Dollars All Currencies [Domain] Currency [Axis] Document and Entity Information [Abstract] The amount of current other receivables and receivables from value added taxes and withholding taxes. Current receivables classified as other and value added and withholding taxes Total Other current receivables Expenses, Operating [Abstract] Operating expenses Operating expenses [Abstract] The amount of income associated with financing activities of the entity net of interest income (expense) . Finance income (cost), net Finance income / (expense), net The cash inflow from issuing ordinary shares net of underwriting fees. Proceeds from issuing shares, net of underwriting fees Proceeds from IPO net of underwriting fees Proceeds from public offerings of common shares, net of underwriting fees The increase in equity through the issue of restricted share awards. Issue of Equity, Restricted Share Awards Restricted Share Awards The increase in equity through the issue of series E extension preference equity instruments that are senior in some aspects to ordinary shares, but subordinate to debt instruments in terms of claim. Issue of equity, extension preference shares, series E Preferred Series E extension shares Changes in working capital [Abstract] Changes in working capital: Adjustments for decrease (increase) in prepaid expenses to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for decrease (increase) in prepaid expense Increase in prepaid expenses Adjustments for decrease (increase) in accrued income to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)] Adjustments for decrease (increase) in accrued income Increase in accrued income Adjustments for increase (decrease) in accrued expenses to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for increase (decrease) in accrued expenses Increase in accrued expenses Adjustments for increase (decrease) in interest payable, to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for Accrued Interest Payable Accrued interest Adjustments for increase (decrease) in long-term financial liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for Increase (Decrease) Long-term Financial Liabilities Increase/(decrease) in long-term debt obligation The cash outflow for deposit of rent. Cash Advances for Rent Deposit Rental deposits Other current receivables [Abstract] The disclosure of other current receivables. Disclosure of other current receivables [Text Block] Other current receivables Schedule disclosing information related to other current receivables. Disclosure of other current receivables [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Disclosure of other current receivables [Line Items] Refers to the maturity period over which the entity considers carrying value of current receivables to correspond to their fair value. Period of maturity, receivables fair value carrying amount Maturity period of assets This member stands for exercise of price range three Range Of Exercise Prices Three [Member] USD 8.33 to USD 12.30 [Member] This member stands for exercise of price range two. Range Of Exercise Prices Two [Member] CHF 9.53 [Member] This member stands for exercise of price range one. Range of Exercise Prices one [Member] CHF 0.15 [Member] Outstanding Options Exercise Price Range and Expiry Dates [Abstract] Outstanding options, exercise price range and expiry dates [Abstract] The date on which share options will expired. Share Options Date of Expiry Expiration Dates The number of US denominated share options granted in a share-based payment arrangement. Number of US denominated share options granted in share-based payment arrangement Number of US denominated options granted (in shares) Number of equity-based instrument plans approved by the entity. Number of Equity-based Instrument Plans Number of equity-based instrument plans The 2016 Plan authorizes the grant of incentive and non-qualified share options, share appreciation rights, restricted share awards, restricted share units, unrestricted share awards, performance share awards, performance-based awards to covered employees and dividend equivalent rights. 2016 Share Option and Incentive Plan [Member] A share-based payment arrangement that existed at any time during the reporting period. Stock option plan A [Member] Stock Option Plan A [Member] Refers to personnel employed by the entity. Employees [Member] Share-based plans outstanding [Abstract] Share-based plans outstanding [Abstract] The maximum term of options granted for a type of share-based payment arrangement that existed at any time during the period. Maximum term of options granted for share-based payment arrangement Contractual life of options For vesting requirements for a type of share-based payment arrangement that existed at any time during the period, this element represents the period which an employees right to exercise and award in no longer contingent on satisfaction of a service condition. Vesting requirements for share-based payment arrangement, award vesting period Vesting conditions Vesting conditions A share-based payment arrangement that existed at any time during the reporting period. Stock option plan B [Member] Stock Option Plan B [Member] A share-based payment arrangement that existed at any time during the reporting period. Stock option plan C1 [Member] Stock Option Plan C1 [Member] This member stands for a class of property, plant and equipment representing laboratory equipment. Laboratory equipment [Member] Lab Equipment [Member] Laboratory Equipment [Member] Amount of decrease in accumulated depreciation as a result of sale or disposal of property, plant and equipment. Disposals, accumulated depreciation Disposals The disclosure of detailed information about other current receivables. Disclosure of detailed information about other current receivables [Table Text Block] Other current receivables The disclosure of prepayments and accrued income. Disclosure of prepaid expenses and accrued income [Text Block] Prepaid expenses and accrued income Antidilutive securities [Abstract] The number of dilutive share options that relate to the assumed exercise of the entity's share options. Dilutive effect of share options issued and outstanding Share options issued and outstanding (in-the-money) (in shares) The number of dilutive restricted share awards subject to future vesting that relate to the assumed exercise of the entity's incentive share options. Dilutive effect of Restricted share awards subject to future vesting Restricted share awards subject to future vesting (in shares) The disclosure of detailed information about prepaid expenses and accrued income. Disclosure of detailed information about prepaid expenses and accrued income [Table Text Block] Prepaid expenses and accrued income Number Of Non-vested Shares [Abstract] Number of non-vested shares [Abstract] Share-based payment arrangement [Abstract] Share-based compensation [Abstract] Weighted Average Exercise Price [Abstract] Weighted Average grant date fair value [Abstract] Weighted Average Exercise Price [Abstract] The maximum term of other equity instruments (ie other than share options) granted for a type of share-based payment arrangement that existed at any time during the period. Maximum Term Of Other Equity Instruments Granted For Share Based Payment Arrangement Contractual life of non-vested share awards The weighted average exercise price of other equity instruments (ie other than share options) vested and expected to vest in a share-based payment arrangement. [Refer: Weighted average [member]] Weighted average exercise price of other equity instruments vested and expected to vest in share-based payment arrangement Vested and expected to vest (in CHF per share) This member stands for share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met. Restricted Shares and Restricted Share Units [Member] Non-vested Share Awards [Member] This member stands for equity instruments that are convertible to stock after a specified period of time. Restricted Stock Units [Member] Restricted Stock Units [Member] The number of other equity instruments (ie other than share options) vested and expected to vest in a share-based payment arrangement. Number of other equity instruments vested and expected to vest in share-based payment arrangement Vested and expected to vest (in shares) Key managers, or ranking officers of an entity, appointed to their position by the board of directors. Executive Management [Member] Executives [Member] Key managers of an entity who collectively have responsibility of governing the entity. Board of Directors [Member] Directors [Member] This member stands for equity instruments that are prohibited for sale for a specified period of time. Restricted shares [Member] Restricted Share Awards [Member] Commitments and contingencies [Abstract] The description of the entity's accounting policy for judgments that management has made in the process of applying the entity's accounting policies that have the most significant effect on amounts recognized in the financial statements along with information about the assumptions that the entity makes about the future, and other major sources of estimation uncertainty at the end of the reporting period, that have a significant risk of resulting in a material adjustment to the carrying amounts of assets and liabilities within the next year. Description of accounting policy for accounting judgments and estimates [Policy Text Block] Critical judgments and accounting estimates The description of the entity's accounting policy for changes to accounting policies not yet adopted by the entity. Disclosure of accounting policy for changes in accounting policies not yet adopted [Policy Text Block] Accounting pronouncements - not yet adopted The description of the entity's accounting policy for the basis for how the entity classifies assets and liabilities as current and non-current. Description of accounting policy for classification of assets and liabilities [Policy Text Block] Current vs. non-current classification The description of the entity's accounting policy for fair value of financial assets and liabilities. Fair value of financial assets and liabilities [Policy Text Block] Fair value of financial assets and liabilities The description of the entity's accounting policy for changes to accounting policies recently adopted by the entity. Disclosure Of Accounting Policy For Changes In Accounting Policies Recently Adopted [Text Block] Accounting pronouncements - recently adopted The description of the entity's accounting policy for the issuance of preferred shares. Description of accounting policy for preferred shares [Policy Text Block] Preferred shares The disclosure of instruments (including contingently issuable shares) that could potentially dilute basic earnings per share in the future. Dilutive effect of convertible instruments [Text Block] Antidilutive securities Weighted Average Assumptions [Abstract] Weighted average assumptions [Abstract] An former executive officer responsible for overseeing the financial activities of the entity. Former Chief Executive Financial Officer [Member] Former Chief Financial Officer [Member] Quarterly Financial Results (Unaudited) [Abstract] The entire disclosure for quarterly financial results. Disclosure of quarterly financial results [Text Block] Quarterly Financial Results (Unaudited) The disclosure of detailed information about the useful life of property, plant and equipment. Schedule of information about property, plant and equipment useful life [Table Text Block] Estimated useful life Number of reportable segments reported by the entity. Reportable segments, number Number of reportable segments Number of operating segments reported by the entity. Operating segments, number Number of operating segments The period or time limit over which financial losses of the entity for preceding years can be deducted from the taxable revenue for a period. Income tax loss, Carryforward period Tax loss carryforward period Residual value over its estimated useful life [Abstract] Residual value over its estimated useful life [Abstract] This member stands for a class of property, plant and equipment representing improvements to assets held under a lease agreement and fixtures and fittings that are not permanently attached to real property. Leasehold improvements and fixtures and fittings [Member] Leasehold Improvements / Furniture [Member] Preferred Shares [Abstract] Preferred Shares [Abstract] The ratio applied to the conversion of one class of stock convertible to another class of stock. For example one preferred share can be converted to one common share or one preferred share can be converted to two common shares. Convertible shares, conversion ratio Conversion ratio of perferred shares to common shares Conversion ratio of preferred shares to common shares Refers to the new International Financial Reporting Standards 16 model for lessee accounting. IFRS 16 Leases [Member] IFRS 16 [Member] Amount resulting from the cumulative effect of adjustment of new accounting principle applied in the period of adoption to accumulated earnings (losses). Cumulative effect of adoption of new accounting principal in period of adoption, accumulated earnings (losses) Cumulative effect adjustment to opening balance of accumulated losses The disclosure of detailed information about quarterly financial results. Disclosure of detailed information about quarterly financial results [Text Block] Quarterly financial data Basis of preparation [Abstract] The number of public offerings issued or completed by the entity. Number of Public Offerings Number of public offerings This member represents the equity instruments that are the first or initial sale of equity shares by a private company to the public. Initial Public Offering [Member] Public Offering [Member] Initial Public Offering [Member] Schedule disclosing information related to the entity's ability to continue as a going concern. Disclosure of going concern [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Disclosure of classes of going concern [Line Items] Going Concern [Abstract] Going concern [Abstract] The disclosure of detailed information about the expiration of income tax losses. Disclosure of detailed information about income tax losses expiry [Table Text Block] Tax losses expiry dates The disclosure of detailed information about income tax reconciliation. Disclosure of detailed information about income tax reconciliation [Table Text Block] Income tax expense reconciled to loss Number of Options [Abstract] Number of Options [Abstract] Weighted Average Remaining [Abstract] Weighted Average Remaining Term (Years) [Abstract] The weighted average remaining contractual life of exercisable share options. Weighted average remaining contractual life of exercisable share options Exercisable General information [Abstract] The entire disclosure for general information about the entity. Disclosure of general information about the entity explanatory [Text Block] General information The number of unique proprietary platform technologies to discover, design and develop medicines and diagnostics to target misfolded proteins. Number of technology platforms Number of proprietary technology platforms Supplementary non-cash activity [Abstract] Supplementary non-cash activity include the following [Abstract] The non-cash reclassification of long-term borrowings to short-term borrowings. Non-current borrowings reclassified to current borrowings Long-term debt reclassified to short-term debt The non-cash portion of the purchase of property plant and equipment recorded to trade and other payables. Purchase of property plant and equipment, non-cash allocation Non-cash purchase, property plant and equipment The non-cash recording of finance receivables against long-term debt. Finance receivables recorded to long-term obligations Finance receivables recorded to long-term obligations Schedule disclosing information related to the Statement of Cash Flows. Statement of Cash Flows [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Statement of Cash Flows [Line Items] Post balance sheet events [Abstract] The number of the entity's common shares sold to a related party in related party transactions. Number of common shares sold, related party transactions Number of shares purchased under subscription rights offering by related party (in shares) The number of persons that comprise key management of the entity that are Executive Management. Number of persons, key management, Executive Management Number of individuals, Executive Management The number of persons that comprise key management of the entity that are the included in Board of Directors excluding the Chief Executive Officer. Number of persons, key management, Board of Directors Number of individuals, Board of Directors The member represents to convertible note agreement. Convertible Note Agreement [Member] Convertible Note Agreement [Member] The collaboration agreement with Lilly for research and development. Collaboration Agreement with Lilly [Member] Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued. Subsequent events [Member] Subsequent Event [Member] Period of time that notice is required to be given for cancellation of the collaborative agreement contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Collaborative agreement, Notice of contract termination period Period to provide notice of termination of agreement The per share amount of the convertible note after converted into common shares. Conversion price per share Conversion price (in dollars per share) The number of common shares of the entity into which a convertible note will convert. Convertible instruments, number of shares Number of shares issuable upon conversion (in shares) The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. Percentage of reasonably possible increase in actuarial assumption [Member] +0.5% Increase [Member] The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. Percentage of reasonably possible decrease in actuarial assumption [Member] -0.5% Decrease [Member] Sensitivity analysis, actuarial assumptions [Abstract] Sensitivity analysis [Abstract] Published actuarial tables that detail assumptions about mortality and disability rates which are used to determine benefit obligations for defined benefit plans. Issued Actuarial Tables, Switzerland Mortality and disability rates Change in other comprehensive loss [Abstract] Change in other comprehensive loss [Abstract] The amount of gain (loss) for the (increase) decrease in value of benefit obligation for the change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Other comprehensive income (loss}, defined benefit plan, gain (loss) Other comprehensive loss, end of period Other comprehensive loss, beginning of period This member stands for defined benefit plans change in other comprehensive loss. Change in other comprehensive loss, defined benefit plan [Member] Change in Other Comprehensive Loss [Member] Net pension cost in statement of income [Abstract] Net pension cost in statement of income [Abstract] The contributions paid to the plan are computed as a percentage of salary, adjusted for the age of the employee. Defined benefit plan, percentage of contribution Contributions paid to the plan by computing percentage in salary The increase in the net defined benefit liability (asset) resulting from the passage of time. Interest income, net defined benefit liability (asset) Interest income Interest income The decrease in the net defined benefit liability (asset) resulting from interest costs resulting from the passage of time. Interest cost, net defined benefit liability (asset) Interest cost Interest cost This member stands for the employee portion of a domestic defined benefit plan. Defined benefits plan, Employer [Member] Employer [Member] This member stands for the employee portion of a domestic defined benefit plan. Defined benefits plan, Employee [Member] Employee [Member] The number of escrow accounts with cash deposits of the entity. Number of escrow deposit accounts Number of deposits in escrow accounts Schedule of cash and cash equivalent balances, including foreign currencies in which the balances are denominated. Cash and cash equivalents [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Cash and cash equivalent [Line Items] The number of voting rights entitled to a share holder for each share owned. For example, one vote for one share owned, or two votes for one share owned. Voting rights, number of votes per share held Number of votes entitled for each preferred share The percentage of outstanding common shares of the entity held by preferred stock owners. Percentage of shares outstanding held by preference stock owners Percentage of shares outstanding owned by Preferred shareholders The increase (decrease) in the number of preferred shares issued. Increase (decrease) in number of preferred shares issued Private placement shares issued (in shares) Price per share received for common stock issued or sold in a private placement transaction. Share Price, Private Placement, Sale of Stock Private placement share price (in dollars per share) This member stands for series E equity instruments that are senior in some aspects to ordinary shares, but subordinate to debt instruments in terms of claim. [Refer: Ordinary shares [member]] Preference shares, Series E [Member] Preferred Shares Series E [Member] The term over which preferred shares have been the primary source of equity financing. Term of equity financing, preferred stock Term of equity financing The nominal value of subscription shares. Share subscription amount Subscription amount The number of equity transactions with owners of the entity to increase the capital of the entity. Number of capital increases Number of separate capital increases The number of classes of the entity's preferred stock outstanding. Number of classes of preferred stock outstanding Number of preferred shares classes outstanding This member represents the equity instruments that are the follow-on offering of equity shares by a private company to the public this issuance is after first follow-on offering. Second Subscription Rights [Member] This member represents the equity instruments from the right of the underwriter to sell additional equity shares over the initial allotment. Option for Over-Allotment [Member] Over-Allotment [Member] This member represents the equity instruments that are the follow-on offering of first equity shares by a private company to the public. First Subscription Rights [Member] First Subscription Rights [Member] Initial Public Offering and Follow-On Offerings [Abstract] Initial Public Offering (IPO) and Follow-On Offerings [Abstract] Price per share received for common stock issued or sold in public offering. Share issued price per share Share price (in dollars per share) The increase (decrease) to the balance of share premium which is the amount received or receivable from the issuance of the entity's shares in excess of nominal value. Increase (decrease) to share premium through issuance of equity Increase in share premium The number of offerings of subscription rights by the entity. Number of offerings The cash inflow from the issuing of ordinary shares net of costs to issue shares. Proceeds from issue of ordinary shares, net issuance costs Net proceeds The increase in equity from ordinary shares issued under a public offering, net of transaction costs. Increase in equity through issue of shares under public offering Issuance of Shares - Public Offering (net of transaction costs) The increase in the number of ordinary shares issued under public offering. Increase in number of ordinary shares issued under public offering Issuance of shares - Public Offering (net of transaction costs) (in shares) The increase in the number of ordinary shares issued under incentive plans. Increase in number of ordinary shares issued under incentive plans Issuance of shares - incentive plans (in shares) The increase in equity resulting from the issue of shares under incentive plans. Increase through shares issued under incentive plans Issuance of Shares - Incentive Plans This member stands for a time band of later than six years and not later than seven years. Later than six years and not later than seven years [Member] Loss Expiry, December 31, 2024 [Member] This member stands for a time band of later than seven years and not later than eight years. Later Than Six Years And Not Later Than Eight Years [Member] Loss Expiry, December 31, 2025 [Member] This member stands for a time band of later than five years and not later than six years. Later than five years and not later than six years [Member] Loss Expiry, December 31, 2023 [Member] Tax losses split by expiry date [Abstract] Tax losses split by expiry date [Abstract] Debt obligation [Abstract] Schedule disclosing information related to details of long term financing obligations. Long term financing obligation [Table] Long term financing obligation [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Long term financing obligation [Line Items] Debt obligation [Line Items] Payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. Debt instrument, number of installments Number of installments Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity period Gain loss on extinguishment of debt Gain on extinguishment of debt Amount of the required periodic payments applied to specific interest. Percentage of additional interest on total repayment Percentage of additional interest on total repayment The percentage of funding commitment amount required to be reimbursed as per a research grant agreement of which the amount includes the entire funding commitment plus an additional upcharge. Reimbursement percentage of funding commitment. Reimbursement percentage of funding commitment The amount of contractual commitments for funding research grants. Funding commitment Funding commitment Funding provided for certain types of expenditures in connection with research and development activities over a contractually-defined period from the LuMind Research Down Syndrome Foundation. Grants, LuMind Research Down Syndrome Foundation [Member] The disclosure of detailed information about trade payables and accrued liabilities. Disclosure of detailed information about trade payables and accrued liabilities [Table Text Block] Trade payables and accrued liabilities Contract Revenue [Abstract] Contract Revenue [Abstract] Contractual arrangement that involves two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity. Collaboration and License Revenue Agreements [Member] Collaboration and License Revenue [Member] The 2016 contractual research agreement associated with collaboration with Biogen. Collaboration agreement of 2016, Biogen [Member] Biogen [Member] 2016 Agreement with Biogen [Member] The 2014 contractual research agreement associated with collaboration with Life Molecular Imaging. License and collaboration agreement of 2014, Life Molecular Imaging [Member] Life Molecular Imaging [Member] 2014 Agreement with Life Molecular Imaging (formerly Piramal Imaging SA) Imaging [Member] The 2012 contractual research agreement associated with collaboration with Genentech. Collaboration agreement of 2012, Genentech [Member] Genentech [Member] 2012 Agreement with Genentech [Member] The 2014 contractual research agreement associated with collaboration with Janssen Pharmaceuticals. Collaboration agreement of 2014, Janssen Pharmaceuticals [Member] Janssen [Member] 2014 Agreement with Janssen Pharmaceuticals [Member] contractual research agreement associated with collaboration with other. Other agreement [Member] Other [Member] Expenses by category [Abstract] Research and Development Expenses [Abstract] Research and Development [Abstract] A class of employee benefits expense that represents wages and salaries that are allocated to research and development expenses. [Refer: Employee benefits expense] Research and development expense allocation, wages and salaries Payroll expenses The amount of all operating expenses allocated to research and development expenses. Research and development expense allocation, operating expense Operating expenses The amount of all operating expenses allocated to general and administrative expenses. General and administrative expense allocation, operating expense Operating expenses The amount of expense from share-based payment transactions with employees that are allocated to research and development expenses. Research and development expense allocation, expense from share-based payment transactions with employees Share-based compensation The amount of expense from share-based payment transactions with employees allocated to general and administrative expense. General and administrative expense allocation, expense from share-based payment transactions with employees Share-based compensation A class of employee benefits expense that represents wages and salaries that are allocated to general and administrative expense. [Refer: Employee benefits expense] General and administrative expense allocation, wages and salaries Payroll expenses Financial Result, net [Abstract] Financial Result, net [Abstract] The amount of current trade payables and accrued liabilities. Trade payables and accrued liabilities Total current liabilities The amount of current accrued research and development costs. Current accrued research and development costs Accrued research and development costs Schedule disclosing information related to details of deferred income. Deferred income [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Deferred income [Line Items] Schedule disclosing information related to details of Prepaid expenses and accrued income. Prepaid Expenses and Accrued Income [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Prepaid Expenses and Accrued Income [Line Items] Percentage that represents to total accrued income. Percentage of Accrued Income Percentage of accrued income Schedule of disclosing information related to commitments and contingencies. Disclosure of information about commitments and contingencies [Table] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Disclosure of information about commitments and contingencies [Line Items] Commitments [Abstract] Commitments and contingencies [Abstract] The amount of provisions for research contracts with external providers. Provisions, research contracts External research projects The period of time required by the lessee in a lease agreement to provide notice of cancellation of a lease to the lessor. Rental contract, period for notice of cancellation Notice period for cancellation of rental contract The period for initial contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Period for initial contract Period for initial contract The contractual research agreement associated with collaboration with Essex Bio-Technology Limited. Collaboration With Essex Bio-Technology Limited [Member] 2017 agreement, Essex Bio-Technology Limited [Member] The research and development of medicines for the treatment of recombinant protein therapeutic candidate. Recombinant Protein Therapeutic Candidate [Member] Recombinant Protein Therapeutic Candidate [Member] Period for initial research plan under a collaborative agreement. Period for Initial Research Plan Period for initial research plan The decrease in contract liabilities for the period. Contract liabilities, deductions Deferred revenue, deductions The increase in contract assets for the period. Contract assets, additions Accrued income, additions The decrease in contract assets for the period. Contract assets, deductions Accrued income, deductions The increase in contract liabilities for the period. Contract liabilities, addition Deferred revenue, additions The disclosure of detailed information about carrying amounts of financial assets and financial liabilities. Disclosure of detailed information about carrying amounts of financial assets and financial liabilities [Table Text Block] Carrying amounts of financial assets and financial liabilities Number of milestones identified to be achieved. Number of milestones to achieve Number of milestones to achieve The number of performance obligations identified applicable to the entity's assessment of a specific contractual arrangement. Number of performance obligations identified Number of performance obligations identified The term of a performance and development period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Period of performance and development The total potential value of the collaborative agreement. Collaborative agreement, potential value Total potential collaboration agreement value Revenue earned from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements. Grant revenue [Member] Grant revenue [Member] Funding provided for certain types of expenditures in connection with research and development activities over a contractually-defined period from the Michael J. Fox Foundation. Grants, Michael J. Fox Foundation [Member] Grant from Michael J. Fox Foundation [Member] The research and development of medicines for the treatment of Positron Emission Tomography (PET) Tracer for Parkinson's Disease. First-in-human Study, Positron Emission Tomography (PET) Tracer for Parkinson's Disease [Member] FIH Study in H1 2019 [Member] Changes in fair value of plan assets [Abstract] Changes in fair value of plan assets [Abstract] The research and development of medicines for the treatment of Alzheimer's disease. Anti-tau antibody in AD [Member] Anti-tau Antibody in AD [Member] Number of times payment(s) received for milestone payments associated with a collaborative agreement. Number of milestone payments received Number of milestone payments received The amount of consideration recognized for the milestone payment(s) associated with a collaborative agreement during the period. Collaborative Agreement, Milestone Payment Recognized Milestone payment recognized Payment(s) received for milestone payments associated with a collaborative agreement. Collaborative agreement, Milestone payment received Milestone payment received The number of indications built on the same research program associated with a collaborative agreement. Collaborative agreement, Number of indications Number of additional indications The cumulative payments received related to revenue from upfront license fees, milestone payments and revenue from research agreements associated with a collaborative agreement. Collaborative agreement, Cumulative payments received Cumulative payments received The research and development of a vaccine for the treatment of Alzheimer's disease. Tau Vaccine in AD [Member] Tau Vaccine in AD [Member] The amount that the entity is eligible to receive for regulatory, commercialization and sales milestones from a collaborative agreement. Collaborative agreement, Collaboration contract receivable for regulatory, commercialization and sales milestones Collaboration contract receivable for regulatory, commercialization and sales milestones The amount that the entity is eligible to receive for clinical milestones from a collaborative agreement.. Collaborative agreement, Collaboration contract receivable for clinical milestones Collaboration contract receivable for clinical milestones The research and development of medicines for the treatment of Alzheimer's disease through molecular imaging. Tau-PET imaging agent in AD [Member] Tau-PET Imaging Agent in AD [Member] The research and development of medicines for the treatment of Alzheimer's disease. Alpha-synuclein and TDP-43 PET tracer in AD [Member] Alpha-synuclein and TDP-43 PET Tracer in AD [Member] Amortized period over which revenue is recognized in income, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Revenue Recognition Amortization Period Revenue recognition amortization period The expected period over which a debt obligation is expected to be extinguished in full. Borrowings, debt extinguishment period Expected debt obligation payoff period This member stands for trade and other payables. Trade and Other Payables [Member] This member stands for short-term financial liabilities. Short-term Debt Obligation [Member] This member stands for accrued expenses. Accrued Expenses [Member] This member represents financial assets classified as short-term. Short-term Financial Assets [Member] This member represents financial assets classified as long-term. Long-term Financial Assets [Member] This member represents receivables classified as other. Other receivables [Member] Other Current Receivables [Member] This member stands for long-term financial liabilities. Long-term Financial Liabilities [Member] Long-Term Debt Obligation [Member] Financial assets and liabilities [Abstract] Financial assets and liabilities [Abstract] Financial risks [Abstract] Financial risks [Abstract] The decrease in net loss arising from a decrease in the interest rate. Decrease in net loss, interest rate decrease Net loss for period decrease, due to decrease in interest rate The decrease in net loss arising from a increase in the foreign exchange rate. Decrease in net loss, foreign exchange rate increase Net loss for period decrease, result of foreign exchange rate increase The number of financial institutions holding the entity's deposits of cash and cash equivalents and short-term financial assets. Number of financial institutions holding, cash and cash equivalents and short-term financial assets Number of financial institutions holding cash and cash equivalents and short-term financial assets The percentage increase to interest rate at the end of the reporting period. Percentage of increase in interest rates Percentage of increase in interest rates The percentage decrease to spot exchange rate at the end of the reporting period. Closing foreign exchange rate, decrease Percentage exchange rate weakened The increase in net loss arising from a increase in the interest rate. Increase in net loss, interest rate increase Net loss for period increase, due to increase in interest rate The percentage decrease to interest rate at the end of the reporting period. Percentage of decrease in interest rates Percentage of decrease in interest rates The increase in net loss arising from a decrease in the foreign exchange rate. Increase in net loss, foreign exchange rate decrease Net loss for period increase, result of foreign exchange rate decrease The percentage increase to spot exchange rate at the end of the reporting period. Closing foreign exchange rate, increase Percentage exchange rate strengthened The periodic interval in which the entity performs a rolling forecast of the entity's cash position. Liquidity management, rolling forecast period Cash position rolling forecast period This member represents cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. Cash on hand and cash equivalents [Member] Cash and Cash Equivalents [Member] The 2006 contractual research agreement associated with collaboration with Genentech. Collaboration agreement of 2006, Genentech [Member] 2006 Agreement with Genentech [Member] The research and development of medicines for the treatment of Alzheimer's disease. Anti-Abeta antibody in AD [Member] Anti-Abeta Antibody in AD [Member] The number of common stock, debt securities, warrants, purchase contracts, units, subscription rights or any combination of the foregoing in one or more future public offerings authorized for sale by the entity through a Shelf Registration Statement. Shelf Registration Statement, shares authorized Shares authorized under Shelf Registration Statement (in shares) The potential additional cash inflow from issuing equity instruments through a Shelf Registration Statement. Potential additional proceeds, sale of equity instruments, Shelf Registration Statement Additional proceeds from Shelf Registration Statement Shelf Registration Statement [Abstract]