Document And Entity Information Issuance of common shares upon exercise of Series B-1 Preferred Shares (in shares) Statistical Measurement [Axis] Note To Financial Statement Details Textual Note 3 - Intangible Assets Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Income tax expense us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Note 4 - Commitments ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 5 - Capital Shares Fair Value Measurement Inputs and Valuation Techniques [Table] Issuance of common shares upon exercise of restricted share units (in shares) ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 3 - Intangible Assets - Schedule of Intangible Assets (Details) Trading Arrangements, by Individual [Table] Note 3 - Intangible Assets - Estimated Future Amortization (Details) Material Terms of Trading Arrangement [Text Block] Note 4 - Commitments - Commitments for Contractual Research (Details) Class of Stock [Domain] Related and Nonrelated Parties [Axis] Note 5 - Capital Shares - Schedule of Preferred Shares (Details) edsa_WorkingCapitalDeficit Working Capital (Deficit) Information pertaining to the working capital (deficit). Note 5 - Capital Shares - Schedule of Warrants (Details) Minimum [Member] Note 5 - Capital Shares - Warrants Assumptions (Details) Foreign exchange loss Note 5 - Capital Shares - Option Activity (Details) Statistical Measurement [Domain] Note 5 - Capital Shares - Options Outstanding and Exercisable (Details) Maximum [Member] Note 5 - Capital Shares - Restricted Stock Units (Details) Note 5 - Capital Shares - Vested Restricted Stock Units (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Accounts payable and accrued liabilities Conversions The net value of stock issued during the period upon the conversion of convertible securities. 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Accounting Policies [Abstract] edsa_PreferredStockConvertibleMaximumBeneficialOwnershipTierThree Preferred Stock, Convertible, Maximum Beneficial Ownership, Tier Three The third tier of the maximum percentage of beneficial ownership upon conversion of the preferred stock. Contractual Obligation, Fiscal Year Maturity [Table Text Block] us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear September 30, 2026 edsa_GovernmentAssistanceAwardAmountRepayable Government Assistance, Award Amount, Repayable Amount of government assistance awarded that comprises amount received, receivable, and to be received unless condition for government assistance is not met that will be repayable. Measurement Input Type [Axis] Income Statement [Abstract] us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) us-gaap_ContractualObligationDueInSecondYear September 30, 2028 us-gaap_ContractualObligationDueInThirdYear September 30, 2029 us-gaap_PreferredStockDividendRatePercentage Preferred Stock, Dividend Rate, Percentage Measurement Input, Expected Dividend Rate [Member] us-gaap_PurchaseObligation Purchase Obligation Measurement Input, Expected Term [Member] us-gaap_ContractualObligation Contractual Obligation us-gaap_ContractualObligationDueInFourthYear September 30, 2030 Net loss Net loss Award Type [Axis] Preferred Stock, Shares Issued Adjustments for: Measurement Input, Price Volatility [Member] Plan Name [Axis] Plan Name [Domain] At The Market Offering Agreement [Member] Sale of the entity's stock, including, but not limited to, initial public offering (IPO) and private placement. us-gaap_GovernmentAssistanceAwardAmount Government Assistance, Award Amount Reimbursement grant income Government Assistance, Nonoperating Income, Increase (Decrease) us-gaap_AmortizationOfIntangibleAssets Amortization of Intangible Assets us-gaap_WarrantsAndRightsOutstandingTerm Warrants and Rights Outstanding, Term us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and shareholders' equity us-gaap_WarrantsAndRightsOutstandingMaturityDate Warrants, maturity date us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense Title and Position [Axis] Measurement Input Type [Domain] us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other current assets Measurement Input, Risk Free Interest Rate [Member] us-gaap_ShareBasedCompensation Share-based compensation us-gaap_ConversionOfStockSharesConverted1 Conversion of Stock, Shares Converted us-gaap_ConversionOfStockSharesIssued1 Conversion of Stock, Shares Issued Warrant assumption Changes in working capital items: us-gaap_PreferredStockSharesIssued Preferred Stock, Shares Issued (in shares) us-gaap_FiniteLivedIntangibleAssetUsefulLife Intangible Asset, Finite-Lived, Useful Life Interest income Licensing Agreements [Member] us-gaap_PreferredStockParOrStatedValuePerShare Preferred Stock, Par or Stated Value Per Share us-gaap_ForeignCurrencyExchangeRateTranslation1 Currency Exchange Rate us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net change in cash and cash equivalents Cash and cash equivalents Related and Nonrelated Parties [Domain] Proceeds from issuance of Series A-1 preferred shares and warrants Effect of exchange rate changes on cash and cash equivalents us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Partners' Capital, Master Limited Partnership, Preferred Unit [Table] Related Party Transaction [Table] Related Party Transactions Disclosure [Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents, beginning of the period Cash and cash equivalents, end of the period Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Issuance of Series A-1 preferred shares and warrants Statement [Table] Effect of exchange rate changes on cash and cash equivalents Other income : Statement of Financial Position [Abstract] us-gaap_NonoperatingIncomeExpense Nonoperating Income (Expense) us-gaap_ContractualObligationDueInNextTwelveMonths September 30, 2027 Non-current assets: Warrant Two [Member] Warrant Two Warrant One [Member] Warrant One Cancelled, weighted average grant date fair value (in dollars per share) The weighted average fair value at grant date for nonvested equity-based awards cancelled during the period on other than stock (or unit) option plans. Warrant Three [Member] Warrant Three edsa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod Cancelled, number of RSU (in shares) The number of cancelled during the period on other than stock (or unit) option plans. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Balance, number of RSU (in shares) Balance, number of RSU (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Balance, weighted average grant date fair value (in dollars per share) Balance, weighted average grant date fair value (in dollars per share) Nature of Operations [Text Block] Granted, number of RSU (in shares) Granted, weighted average grant date fair value (in dollars per share) Product and Service [Domain] edsa_ClassOfWarrantOrRightMaximumBeneficialOwnership Class of Warrant or Right, Maximum Beneficial Ownership Percentage of maximum beneficial ownership of warrants. Product and Service [Axis] edsa_PreferredStockConvertibleMaximumBeneficialOwnership Preferred Stock, Convertible, Maximum Beneficial Ownership Maximum beneficial ownership of convertible preferred stock. Series B-1 Purchase Agreement [Member] Represents Series B-1 Purchase Agreement. edsa_EquityOfferingMaximumWithoutApproval Equity Offering, Maximum Without Approval Maximum amount of equity offering without approval. us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Series B-1 Preferred Stock [Member] Represents Series B-1 Preferred Stock. Share-Based Payment Arrangement, Option, Exercise Price Range [Table] us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables Accounts and other receivable Common Stock and Warrants [Member] Represents common stock and warrants. us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) Exercise Price Range [Domain] Exercise Price Range [Axis] Series A-1 Preferred Stock [Member] Represents Series A-1 Preferred Stock. dei_DocumentType Document Type Issuance of Series B-1 preferred shares Equity impact of preferred stock issued during the period. Expenses: Document Information [Line Items] dei_DocumentQuarterlyReport Document Quarterly Report us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod Forfeited, number of options (in shares) Document Information [Table] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod Expired (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant us-gaap_OperatingLeaseExpense Operating Lease, Expense Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber Options, exercisable (in shares) dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Balance, number of options (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Options, number (in shares) dei_DocumentTransitionReport Document Transition Report Commitments and Contingencies Disclosure [Text Block] Balance, options, weighted average exercise price (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Options, weighted average exercise price (in dollars per share) Statement [Line Items] Private Placement [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Issued and outstanding: 3,075,473 common shares (September 30, 2022 - 2,380,280) (in shares) Common Stock, Shares, Outstanding (in shares) Award Type [Domain] Weighted average number of common shares (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate February 2025 Series B-1 Purchase Agreement [Member] Represents the February 2025 Series B-1 Purchase Agreement. RSUs, vesting from 13-24 months, exercisable (in shares) The number of exercisable equity instruments other than options vesting from thirteen to twenty-four months. Loss per common share - basic and diluted (in dollars per share) RSUs, vesting from 13-24 months, number (in shares) The number of equity instruments other than options vesting from thirteen to twenty-four months. RSUs, vesting after 24 months, exercisable (in shares) The number of exercisable equity instruments other than options vesting after twenty-four months. Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] RSUs, vesting after 24 months, number (in shares) The number of equity instruments other than options vesting after twenty-four months. Fully-vested RSUs, exercisable (in shares) The number of vested equity instruments other than options that are exercisable. Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Authorized unlimited common shares without par value Issued and outstanding: 8,885,719 common shares (September 30, 2025 -7,141,783) RSUs, vesting in the next 12 months, exercisable (in shares) The number of exercisable shares of equity instruments other than options vesting in the next twelve months. RSUs, vesting in the next 12 months, number (in shares) The number of equity instruments other than options vesting in the next twelve months. Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo September 30, 2028 us-gaap_ProceedsFromIssuanceOrSaleOfEquity Proceeds from Issuance or Sale of Equity us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree September 30, 2029 Title and Position [Domain] Long-term deposits us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths September 30, 2027 Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Number The number of exercisable equity instruments other than options. Proceeds from issuance of common shares Proceeds from Issuance of Common Stock Collaborative Arrangement and Arrangement Other than Collaborative [Domain] us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 Class of Warrant or Right, Exercise Price of Warrants or Rights Balance, warrants, weighted average exercise price (in dollars per share) Balance, warrants, weighted average exercise price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Number The number of equity instruments other than options. us-gaap_AssetReportingCurrencyDenominatedValue Net Assets Accounts payable and accrued liabilities Proceeds from issuance of Series B-1 preferred shares us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear September 30, 2026 CEO, Secretary, Directors, Velan, Stonepine, Nantahala, and Rubric [Member] Represents the various related parties involved with the Series B-1 Purchase Agreement us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour September 30, 2030 Carlo Sistilli [Member] Represents Calo Sistilli. us-gaap_TableTextBlock Notes Tables Patrick Marshall [Member] Represents Patrick Marshall. us-gaap_FiniteLivedLicenseAgreementsGross Finite-Lived License Agreements, Gross Intangible asset, net Total intangible assets, net Beneficial Owner [Member] Document Fiscal Period Focus The Constructs Document Fiscal Year Focus Net loss and comprehensive loss Net comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent edsa_PreferredStockConvertibleMaximumBeneficialOwnershipAtOptionOfHolderGiven61DaysNotice Preferred Stock, Convertible, Maximum Beneficial Ownership at Option of Holder Given 61 Days Notice Maximum beneficial ownership of convertible preferred stock at option of holder given 61 days notice. edsa_PreferredStockConvertibleMaximumBeneficialOwnershipAtOptionOfHolder Preferred Stock, Convertible, Maximum Beneficial Ownership at Option of Holder Maximum beneficial ownership of convertible preferred stock at option of holder. Amendment Flag Common Stock [Member] Exercised, weighted average grant date fair value (in dollars per share) Weighted average price at which holders acquired shares when converting their equity instruments into shares. dei_DocumentPeriodEndDate Document Period End Date Legal Entity [Axis] dei_EntityFileNumber Entity File Number us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Entity [Domain] Entity Central Index Key dei_EntityRegistrantName Entity Registrant Name Exchange differences on translation dei_EntityCurrentReportingStatus Entity Current Reporting Status Entity Incorporation, State or Country Code us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1 Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Current Fiscal Year End Date us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1 Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Research and development Entity Filer Category dei_EntityShellCompany Entity Shell Company Entity Emerging Growth Company Entity Small Business us-gaap_OperatingIncomeLoss Loss from operations edsa_UpfrontLicensePayment Upfront License Payment Amount of upfront license payment. Common Stock, Shares Authorized, Unlimited [Fixed List] edsa_LicenseAgreementRenewalPeriod License Agreement, Renewal Period Period for renewal of the license agreement. edsa_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour Thereafter Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). The Constructs [Member] Represents the Constructs. edsa_PaymentsForMilestoneRoyaltyAndSublicensing Payments for Milestone, Royalty and Sublicensing Amount of cash outflow for milestone, royalty and sublicensing, Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] edsa_MaximumContingentObligation Maximum Contingent Obligation Amount of maximum contingent obligation. Class of Warrant or Right [Table] License Agreement Related to Pharmaceutical Products [Member] Represents the license agreement related to pharmaceutical products. Statement of Stockholders' Equity [Abstract] Intangible Asset, Finite-Lived, Class [Axis] Loss Contingencies [Table] Stock Conversion Description [Axis] The 2019 Plan [Member] Represents the 2019 Plan. Entity Address, City or Town edsa_ClassOfWarrantOrRightOutstandingWeightedAverageRemainingContractualTerm Class of Warrant or Right, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term for warrants or rights outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. edsa_MilestoneExpense Milestone Expense Amount of milestone expense. Forfeited, options, weighted average grant date fair value (in dollars per share) Accumulated deficit Retained Earnings (Accumulated Deficit) Intangible Asset, Finite-Lived, Class [Domain] License Agreement to Acquire Global Rights of Pharmaceutical Product [Member] Represents the license agreement to acquire global rights of pharmaceutical product. Entity Address, Address Line One edsa_EquityOfferingMaximumAmount Equity Offering, Maximum Amount The maximum amount allowed to be issued under the equity offering. Class of Warrant or Right [Axis] Statement of Cash Flows [Abstract] Preferred return on Series A-1 preferred shares The preferred return on Class A preferred shares. Conversion of Stock, Name [Domain] Class of Warrant or Right [Domain] City Area Code edsa_ClassOfWarrantOrRightExpiredDuringPeriod Expired, number of warrant shares (in shares) The number of warrants or rights cancelled during period. Issued, warrants, weighted average exercise price (in dollars per share) Exercise price per share of warrants or rights issued during period. Local Phone Number edsa_ClassOfWarrantOrRightExpiredDuringPeriodExercisePrice Expired, warrants, weighted average exercise price (in dollars per share) Exercise price per share of warrants or rights cancelled during period. Government Assistance, Type [Domain] Entity Address, Postal Zip Code edsa_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableIntrinsicValuePerShare Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Per Share Per share or per unit amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Entity Address, Country Government Assistance [Text Block] Preferred Stock [Member] Shareholders' equity: Title of 12(b) Security Equity Components [Axis] Expired, options, weighted average grant date fair value (in dollars per share) Weighted average grant-date fair value of options expired. Security Exchange Name Range One [Member] Represents range one. Trading Symbol us-gaap_PaymentsOfStockIssuanceCosts Payments for issuance costs of common shares Issued, number of warrant shares (in shares) Class of Warrant or Right, Issued During Period The number of warrants or rights issued during period. Class of Stock [Axis] Equity Component [Domain] Government Assistance [Table] Range Six [Member] Represents range six. Government Assistance, Type [Axis] Range Three [Member] Represents range three. AOCI Attributable to Parent [Member] Equity [Text Block] Range Two [Member] Represents range two. dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Additional Paid-in Capital [Member] us-gaap_ClassOfWarrantOrRightOutstanding Balance, number of warrant shares (in shares) Balance, number of warrant shares (in shares) Balance, number of warrant shares (in shares) Range Five [Member] Represents range five. Retained Earnings [Member] Range Four [Member] Represents range four. Earnings Per Share [Text Block] Chief Executive Officer [Member] Fully-vested RSUs, number (in shares) Number of fully vested equity instruments other than options outstanding that can be converted into shares. edsa_SensitivityAnalysisTenPercentChangeToForeignCurrencyExchangeImpactToNetIncomeLossAndOtherComprehensiveIncomeLoss Sensitivity Analysis, Ten Percent Change to Foreign Currency Exchange, Impact to Net Income (Loss) and Other Comprehensive Income (Loss) Amount of impact to net income (loss) and other comprehensive income (loss) from 10% change in foreign currency exchange rate. Accounts and other receivable us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share) The 2023 SIF Agreement [Member] Represents the 2023 SIF Agreement. edsa_GovernmentAssistanceAwardAmountNotRepayable Government Assistance, Award Amount, Not Repayable Amount of government assistance awarded that comprises amount received, receivable, and to be received unless condition for government assistance is not met that will not be repayable. Financial Instruments Disclosure [Text Block] Balance, options, weighted average grant date fair value (in dollars per share) edsa_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionWeightedAverageGrantDateFairValue Weighted average grant-date fair value of options outstanding. Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Issuance costs Issuance costs Value of stock issued during the period for issuance costs. edsa_GovernmentAssistancePeriodOfRepayment Government Assistance, Period of Repayment Period of repayment for government assistance. edsa_GovernmentAssistanceExpirationPeriodAfterLastRepayment Government assistance, Expiration, Period After Last Repayment Period after last repayment date for expiration of government assistance. edsa_GovernmentAssistanceMaximumAmountRepayableFactorOfOriginal Government Assistance, Maximum Amount Repayable, Factor of Original The factor of original amount repayable for maximum amount to be repaid for government assistance. Sale of Stock [Axis] Warrant Shares [Member] In reference to the Warrant Shares. Share-based compensation October 2024 SPA [Member] In reference to the 2024 securities purchase agreement. Fair Value Option, Disclosures [Table] us-gaap_PaymentsOfDerivativeIssuanceCosts Payment for issuance costs of warrants Chief Executive Officer, Secretary, and Director [Member] In reference to the Chief Executive Officer, Secretary, and Director Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Sale of Stock [Domain] Share-Based Payment Arrangement, Option, Activity [Table Text Block] us-gaap_Assets Total assets us-gaap_CashAndCashEquivalentsAtCarryingValue Cash and Cash Equivalent edsa_UnitsIssuedCombinedPurchasePrice Units Issued, Combined Purchase Price In relation to the combined purchase price of units issued. edsa_UnitsIssuedPercentageOfUnderlyingConversionShares Units Issued, Percentage of Underlying Conversion Shares In relation to the percentage of underlying conversion shares. Share-Based Payment Arrangement, Option [Member] Current liabilities: us-gaap_LiabilitiesCurrent Total current liabilities us-gaap_PaymentsToSuppliers Payments to Suppliers us-gaap_DepreciationDepletionAndAmortization Depreciation and amortization Intangible Asset [Text Block] edsa_PaymentsForLicensingAndRoyalties Payments for Licensing and Royalties Amount of cash outflow for licensing and royalties. Drug Substance [Member] Represents a drug substance. Series B-1 Preferred Shares Converted into Common Shares [Member] Represents Series B-1 Preferred Shares converted into common shares. Accumulated other comprehensive loss Common Stock, No Par Value (in dollars per share) us-gaap_PreferredStockConvertibleSharesIssuable Preferred Stock, Convertible, Shares Issuable Intangible Asset, Finite-Lived [Table Text Block] us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Less: accumulated amortization us-gaap_PreferredStockConvertibleConversionPrice Preferred Stock, Convertible, Conversion Price Intangible Asset, Indefinite-Lived [Table] us-gaap_PreferredStockConvertibleConversionRatio Preferred Stock, Convertible, Conversion Ratio us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised Exercised, number of RSU (in shares) General and administrative us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Loss before income taxes Issuance costs relieved upon conversion Value of reclassification of issuance costs upon conversion of convertible securities. Additional paid-in capital us-gaap_StockholdersEquity Total shareholders' equity Balance Balance Prepaid expenses and other current assets us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Issuance of common shares Stock Issued During Period, Value, New Issues Stock, Class of Stock [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Issuance of common shares upon exercise of Series B-1 Preferred Shares Current assets: us-gaap_AssetsCurrent Total current assets Issuance of common shares upon exercise of restricted share units ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Class A-1 Warrants [Member] Represents Class A-1 Warrants. Schedule of Preferred Units [Table Text Block] Issuance of common shares (in shares) Stock Issued During Period, Shares, New Issues (in shares) Restricted Stock Units (RSUs) [Member]