Document And Entity Information Dividend rate Note To Financial Statement Details Textual Exercise price per share (in dollars per share) Significant Accounting Policies Note 3 - Summary of Significant Accounting Policies Note 4 - Prepaid Expenses and Other Current Assets Risk-free interest rate Note 5 - Property and Equipment, Net Note 6 - Accrued Expenses Note 7 - Note Payable Note 8 - Capital Stock us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate Volatility Non-current liabilities: Note 10 - Commitments and Contingencies Note 3 - Summary of Significant Accounting Policies - Schedule of Changes in Contract Liabilities (Details) Note 3 - Summary of Significant Accounting Policies - Schedule of Contract Acquisition Costs (Details) Note 3 - Summary of Significant Accounting Policies - Schedule of Stock-based Compensation Expense (Details) Note 3 - Summary of Significant Accounting Policies - Schedule of Fair Value of Options Granted - Black-Scholes Option Pricing Model (Details) Note 3 - Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities Excluded From Earnings Per Share Computation (Details) Note 4 - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) us-gaap_LiabilitiesCurrent Total current liabilities Note 5 - Property and Equipment, Net - Schedule of Property and Equipment (Details) Schedule of Debt [Table Text Block] Note 5 - Property and Equipment, Net - Schedule of Assets Subject to Financing Lease (Details) Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details) Expected term in years (Year) Note 7 - Note Payable - Summary of Notes Payable (Details) Note 8 - Capital Stock - Schedule of Warrants (Details) Note 10 - Commitments and Contingencies - Operating lease in Condensed Consolidated Balance Sheet (Details) Note 10 - Commitments and Contingencies - Operating Lease Cost (Details) Note 10 - Commitments and Contingencies - Minimum Lease Payments (Details) Note 10 - Commitments and Contingencies - Operating Activities in Cash flow Statements (Details) Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Notes To Financial Statements Receivable for insurance claim Notes To Financial Statements [Abstract] Note payable Fair Value per share (in dollars per share) vtgn_NumberOfSubsidiaries Number of Subsidiaries Represents the number of subsidiaries. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in dollars per share) us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent Accounts Payable and Accrued Liabilities, Current Deferred revenue - current portion Deferred Revenue, Current Deferred Revenue, Current vtgn_ProceedsFromGovernmentResearchGrantAwards Proceeds from Government Research Grant Awards The cash inflow from government research grant awards. vtgn_StockIssuedDuringPeriodValueSettlementOfLiabilities Stock Issued During Period, Value, Settlement of Liabilities Value of shares of stock issued attributable to transactions classified as liabilities. Accrued expenses Accrued Liabilities, Current vtgn_ProceedsFromIssuanceOfDebtAndEquitySecurities Proceeds from Issuance of Debt and Equity Securities The cash inflow from the issuance of debt and equity securities. Accrued compensation Employee-related Liabilities, Current, Total Accounts payable us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in shares) Collaborative Arrangement, AffaMed Agreement [Member] Collaborative arrangement transaction with AffaMed. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period (in shares) Other Accrued Liabilities us-gaap_PolicyTextBlockAbstract Accounting Policies The 2016 Equity Incentive Plan [Member] Represents information related to the 2016 Equity Incentive Plan. The 2019 Employee Stock Purchase Plan [Member] Represents information related to the 2019 Employee Stock Purchase Plan (the 2019 ESPP). us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) Accrued professional services The 2019 Omnibus Equity Incentive Plan [Member] Represents information related to the 2019 Omnibus Equity Incentive Plan. Clinical and nonclinical materials and contract services Amount of consideration paid in advance for materials and services. Prepaid Expenses and Other Current Assets Disclosure [Text Block] The entire disclosure for prepaid expenses and other current assets. us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) Accrued expenses for clinical and nonclinical materials, development and contract services Carrying value as of the balance sheet date of obligations incurred through that date and payable for materials and contractual services. Consulting Firm [Member] Represents a related party consulting firm. Laboratory Equipment [Member] Represents laboratory equipment. Tenant Improvements [Member] Represents tenant improvements. us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Manufacturing Equipment [Member] Represents manufacturing equipment. Insurance premiums settled by issuing note payable Represents the insurance premiums settled by issuing note payable. Current liabilities: Vesting [Axis] Vesting [Domain] Operating lease liability Share-Based Payment Arrangement, Tranche One [Member] us-gaap_Assets Total assets Plan Name [Axis] Plan Name [Domain] us-gaap_OperatingLeaseExpense Operating Lease, Expense us-gaap_CapitalizedContractCostNet Deferred Contract Acquisition Costs Deferred Contract Acquisition Costs Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] vtgn_RevenueRecognitionMilestoneMethodMaximumMilestonePaymentsPermitted Revenue Recognition, Milestone Method, Maximum Milestone Payments Permitted Represents the maximum amount of consideration that can be received during the period for the milestone or milestones. vtgn_RevenueFromContractWithCustomerPaymentPeriod Revenue from Contract with Customer, Payment Period (Year) Represents the payment period for the payment under the collaborative arrangement. Business Description and Basis of Presentation [Text Block] Award Type [Domain] ATM Facility [Member] Represents ATM facility. Award Type [Axis] Deferred offering costs Deferred Offering Costs, Noncurrent Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred. Net loss Net loss and comprehensive loss Restricted Stock [Member] vtgn_ClassOfWarrantOrRightWarrantsExercisedNumber Class of Warrant or Right, Warrants, Exercised, Number (in shares) The number of warrants or rights exercised during the period. Share-Based Payment Arrangement, Option [Member] Warrant [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] vtgn_StockSalesAgreementMaximumAggregateOfferingPrice Stock Sales Agreement, Maximum Aggregate Offering Price The maximum aggregate offering price for common stock in the sales agreement. Jefferies LLC [Member] Represents the other party to the agreement. Commitments and Contingencies Disclosure [Text Block] us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Accumulated depreciation and amortization Property and equipment, net Property, plant and equipment Amended 2019 Plan [Member] Represents amended 2019 plan. Equity Line [Member] Represents equity line. Shares (in shares) The number of shares utilized in the fair value assumption. Cash flows from investing activities: Accounts payable and accrued expenses us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Related Party Transactions Disclosure [Text Block] us-gaap_IncomeTaxExpenseBenefit Income taxes vtgn_SublicenseFees Sublicense Fees Represents sub-license fees. vtgn_DeferredContractAdditionsCurrent Deferred Contract Acquisition Costs, Additions Amount of increase in deferred contract acquisition cost. us-gaap_OperatingExpenses Total operating expenses Deferred Revenue, Additions Amount of increase in obligation to transfer good or service to customer for which consideration from customer has been received. General and administrative General and Administrative Expense vtgn_DeferredCostsAdditionsTotal Deferred Contract Acquisition Costs, Additions Amount of increase in deferred contract acquisition cost. Accrued Interest vtgn_DeferredCostsDeductionsCurrent Deferred Contract Acquisition Costs, Deductions Amount of decrease in deferred contract acquisition cost. vtgn_DeferredCostsDeductionsNoncurrent Deferred Contract Acquisition Costs, Deductions Amount of decrease in deferred contract acquisition cost. Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value vtgn_DeferredCostsDeductionsTotal Deferred Contract Acquisition Costs, Deductions Amount of increase in deferred contract acquisition cost. Contract with Customer, Liability, Current [Member] Represents a current obligation to transfer good or service to customer for which consideration has been received. Contract with Customer, Liability, Non-current [Member] Represents a non-current obligation to transfer good or service to customer for which consideration has been received. vtgn_DeferredCostsAdditionsNoncurrent Deferred Contract Acquisition Costs, Additions Amount of increase in deferred contract acquisition cost. Share-based Payment Arrangement, Expense vtgn_ClassOfWarrantOrRightWeightedAverageExercisePrice Class of Warrant or Right, Weighted Average Exercise Price (in dollars per share) Represents the weighted average exercise price of warrants. Amendment Flag City Area Code Use of Estimates, Policy [Policy Text Block] us-gaap_DebtInstrumentPeriodicPayment Debt Instrument, Periodic Payment vtgn_StockIssuedDuringPeriodSharesStockOptionsExercisedNet Stock Issued During Period Shares Stock Options Exercised, Net (in shares) The net number of shares issued during period for stock options exercised. New Accounting Pronouncements, Policy [Policy Text Block] Deferred sublicense revenue, net of deferred contract acquisition costs us-gaap_SharesOutstanding Balances (in shares) Balances (in shares) Preferred Stock, shares outstanding (in shares) Current Fiscal Year End Date us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other current assets Basis of Accounting [Text Block] Assumed discount rate Document Fiscal Period Focus Operating lease cost Document Fiscal Year Focus Lease, Cost [Table Text Block] Acquisition of office equipment subject to financing lease Document Period End Date Assumed remaining lease term in years (Year) Entity File Number Entity Emerging Growth Company us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Document Type Entity Small Business Entity Shell Company Document Information [Line Items] Document Information [Table] Entity Filer Category Debt Instrument [Axis] Entity Current Reporting Status Debt Instrument, Name [Domain] Depreciation and amortization The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets, excluding amortization of operating lease assets. us-gaap_CapitalizedContractCostGross Capitalized Contract Cost, Gross us-gaap_CapitalizedContractCostAmortization Capitalized Contract Cost, Amortization us-gaap_CapitalizedContractCostImpairmentLoss Capitalized Contract Cost, Impairment Loss Share-based compensation expense Entity Tax Identification Number Entity Central Index Key Entity Registrant Name Entity [Domain] Legal Entity [Axis] Capitalized Contract Cost [Table Text Block] Entity Address, Address Line One us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Entity Address, City or Town Entity Address, Postal Zip Code us-gaap_TreasuryStockCommonValue Treasury stock, at cost, 4,522 shares of common stock held at June 30, 2023 and March 31, 2023 Entity Address, State or Province Entity Common Stock, Shares Outstanding Net proceeds from issuance of common stock, including option exercises Represent net cash inflow from issuance of common stock and option. Trading Symbol Schedule of Finance Leased Assets [Table Text Block] Tabular disclosure of assets subject to finance lease. vtgn_ReimbursementFromCollaborationPartner Reimbursement from Collaboration Partner Represents reimbursement form collaboration partner. Reverse Stock Split [Member] The conversion of a reverse stock split where there is a reduction in the shares outstanding. us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) Local Phone Number Issuance of common stock upon exercise of options for cash (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) vtgn_PaymentsToAcquireLaboratoryAndOtherEquipment Purchases of laboratory and other equipment Represents cash outflow for laboratory and other equipment. us-gaap_TableTextBlock Notes Tables Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares) Sale of common stock pursuant to 2019 Employee Stock Purchase Plan Stock Issued During Period, Value, Employee Stock Purchase Plan Sales Agreement [Member] Represents Sales Agreement. Warrants Expiring December 9, 2024 [Member] Represents warrants expiring December 9, 2024. Issuance of common stock upon exercise of options for cash Related Party, Type [Axis] Related Party, Type [Domain] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement [Member] Issuance of common stock upon ATM purchase (in shares) Stock Issued During Period, Shares, New Issues (in shares) us-gaap_OperatingCostsAndExpenses Operating Costs and Expenses us-gaap_StockIssuedDuringPeriodValueIssuedForServices Stock Issued During Period, Value, Issued for Services us-gaap_StockIssuedDuringPeriodSharesIssuedForServices Stock Issued During Period, Shares, Issued for Services (in shares) us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders’ equity Warrants Issued In Connection With Equity Financing [Policy Text Block] Disclosure of accounting policy for warrant issued in connection with equity financing. Issuance of common stock upon ATM purchase Related Party Transaction [Axis] Related Party Transaction [Domain] Accumulated deficit Retained Earnings (Accumulated Deficit) Research and development Research and Development Expense Receivable from collaboration partner Represents prepaid receivable from collaboration partner. Money Market Funds [Member] Cash and Cash Equivalents [Axis] Debt Disclosure [Text Block] Cash and Cash Equivalents [Domain] Changes in operating assets and liabilities: us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Subsequent Event [Member] Non-current operating lease obligation Operating lease obligation - non-current portion Promissory Note [Member] Represents information related to promissory note. Present value of operating lease liabilities us-gaap_OperatingLeaseLiability Total operating lease liability Subsequent Event Type [Axis] Current operating lease obligation Operating lease obligation - current portion Subsequent Event Type [Domain] Financing lease obligation - current portion Warrants Expiring July 25, 2025 [Member] Represents warrants expiring July 25, 2025. Deferred contract acquisition costs - non-current portion Financing lease obligation - non-current portion Subsequent Events [Text Block] Security deposits Right-of-use asset – operating lease us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total lease expense us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less imputed interest us-gaap_FinanceLeasePrincipalPayments Repayment of financing lease obligations 2026 2027 2028 Net book value of office equipment subject to financing lease Fair Value Measurement, Policy [Policy Text Block] 2024 2025 Assets and Liabilities, Lessee [Table Text Block] Tabular disclosure of lessee's assets and liabilities. us-gaap_CapitalizedContractCostNetNoncurrent Deferred Contract Acquisition Costs - non-current portion Deferred Contract Acquisition Costs - non-current portion Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Stock-based compensation Lessee, Leases [Policy Text Block] Schedule Of Operating Leaser For Cash Flow Disclosures [Table Text Block] Tabular disclosure of operating lease for cash flow discloses. Earnings Per Share, Policy [Policy Text Block] Operating expenses: Comprehensive Income, Policy [Policy Text Block] Research, Development, and Computer Software, Policy [Policy Text Block] us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 Stockholders' Equity Note, Stock Split, Conversion Ratio us-gaap_DepreciationDepletionAndAmortization Depreciation, Depletion and Amortization us-gaap_FinancialLiabilitiesFairValueDisclosure Financial Liabilities Fair Value Disclosure us-gaap_SharesIssuedPricePerShare Shares Issued, Price Per Share (in dollars per share) us-gaap_AssetsCurrent Total current assets us-gaap_CashAndCashEquivalentsFairValueDisclosure Cash and Cash Equivalents, Fair Value Disclosure Equity [Text Block] Treasury stock, shares (in shares) Compensation Related Costs, Policy [Policy Text Block] Common stock, $0.001 par value; 325,000,000 shares authorized at June 30, 2023 and March 31, 2023; 7,879,673 and 7,315,583 shares issued at June 30, 2023 and March 31, 2023, respectively Measurement Frequency [Axis] Adjustments to reconcile net loss to net cash used in operating activities: Measurement Frequency [Domain] Fair Value, Recurring [Member] Common Stock, Shares Authorized (in shares) Common Stock, Shares Authorized (in shares) Common Stock, Shares Issued (in shares) Common Stock, Par Value (in dollars per share) Common Stock, Par or Stated Value Per Share (in dollars per share) Deferred contract acquisition costs - current portion Statistical Measurement [Domain] Cash paid for amounts included in the measurement of lease liabilities Supplemental disclosure of noncash activities: Weighted Average [Member] us-gaap_CapitalizedContractCostNetCurrent Deferred Contract Acquisition Costs - current portion Deferred Contract Acquisition Costs - current portion Product and Service [Axis] Software licenses and all other Product and Service [Domain] Statistical Measurement [Axis] Preferred stock, $0.001 par value; 10,000,000 shares authorized at June 30, 2023 and March 31, 2023: no shares outstanding at June 30, 2023 and March 31, 2023 Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Table Text Block] Preferred Stock, shares authorized (in shares) Preferred Stock, Shares Authorized (in shares) i3 Strategy Partners [Member] Represents i3 Strategy Partners. Terminated Former Employee [Member] Represents terminated former employee. Preferred Stock, Par or Stated Value (in dollars per share) Preferred Stock, Par or Stated Value Per Share (in dollars per share) Insurance Revenue Revenue from Contract with Customer, Including Assessed Tax Advisory Services [Member] Represents advisory services. The 2016 And 2019 Omnibus Equity Incentive Plans [Member] Represents information related to the 2016 and 2019 Omnibus Equity Incentive Plan. Fair Value Hierarchy and NAV [Domain] Office Furniture And Equipment [Member] Represents office furniture and equipment. Fair Value, Inputs, Level 1 [Member] vtgn_UpfrontLicensePayment Upfront License Payment Represent upfront license revenue. Fair Value Hierarchy and NAV [Axis] Interest income, net Cash flows from operating activities: Revenue [Policy Text Block] Statement [Line Items] Additional paid-in capital Stockholders’ equity: Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Current assets: us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period License [Member] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net decrease in cash and cash equivalents us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by (used in) financing activities us-gaap_Liabilities Total liabilities Commitments and contingencies (Note 10) Sale of Stock [Axis] Sale of Stock [Domain] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] us-gaap_OperatingIncomeLoss Loss from operations us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash used in operating activities us-gaap_ContractWithCustomerLiabilityRevenueRecognized Deferred Revenue, Deductions Other income, net: us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Counterparty Name [Axis] Counterparty Name [Domain] Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] us-gaap_ContractWithCustomerLiability Contract with Customer, Liability Deferred Revenue Deferred Revenue vtgn_CapitalizedContractCostDeferred Capitalized Contract Cost, Deferred Represents the deferred amount of capitalized contract costs. Former Employee [Member] Represents former employee. Concentration Risk, Credit Risk, Policy [Policy Text Block] Retained Earnings [Member] us-gaap_ProceedsFromStockOptionsExercised Proceeds from Stock Options Exercised Net proceeds (expenses) from sale of common stock under At the Market (ATM) facility, net of deferred offering costs Proceeds from Issuance of Common Stock Title of Individual [Domain] Title of Individual [Axis] Treasury Stock, Common [Member] Additional Paid-in Capital [Member] Common Stock [Member] Equity Components [Axis] Equity Component [Domain] Prepaid Expenses and Other Current Assets [Member] Class of Warrant or Right, Exercise Price (in dollars per share) Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Total balance Class of Warrant or Right, Outstanding (in shares) us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Loss before income taxes Cash and Cash Equivalents, Policy [Policy Text Block] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Document Quarterly Report Entity Incorporation, State or Country Code Corporate Development and Public Relations Advisory Services [Member] Represents corporate development and public relations advisory services. General and Administrative Expense [Member] Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Document Transition Report Entity Interactive Data Current Security Exchange Name Title of 12(b) Security Research and Development Expense [Member] Income Statement Location [Axis] Income Statement Location [Domain] Nonmonetary Transaction Type [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement Disclosure [Text Block] Nonmonetary Transaction Type [Axis] us-gaap_RepaymentsOfNotesPayable Repayment of note payable Market price per share at grant date (in dollars per share) us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization Accumulated depreciation Antidilutive Securities (in shares) Office equipment subject to financing lease Statement [Table] Statement of Financial Position [Abstract] Weighted average shares used in computing basic and diluted net loss (in shares) Accounts Payable and Accrued Liabilities Disclosure [Text Block] Basic and diluted net loss (in dollars per share) Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Statement of Cash Flows [Abstract] Lease Contractual Term [Domain] Contract with Customer, Duration [Axis] Statement of Stockholders' Equity [Abstract] Lease Contractual Term [Axis] Contract with Customer, Duration [Domain] Income Statement [Abstract] Schedule of Accrued Liabilities [Table Text Block] us-gaap_LiabilitiesNoncurrent Total non-current liabilities vtgn_RevenueFromContractWithCustomerIncludingAssessedTaxDerecognized Revenue from Contract with Customer Including Assessed Tax, Derecognized Revenue, derecognized Represents derecognized revenue from contract with customer including assessed tax. Cash flows from financing activities: Amortization of operating lease right-of-use asset Deferred revenue - non-current portion Deferred Revenue, Non-current Deferred Revenue, Non-current us-gaap_StockholdersEquity Total stockholders’ equity Balances Balances vtgn_LeaseMonthlyPayment Lease, Monthly Payment Amount of monthly payment of lease. Lease for Office Equipment Fully-depreciated [Member] Lease for Office Equipment Fully-depreciated. Class of Stock [Axis] Promissory Note 3.88% [Member] Promissory Note 3.88%. Principal balance Amount of principal balance of debt instrument.