Document And Entity Information
Document Financial Statement Error Correction [Flag]
Dividend rate
Note To Financial Statement Details Textual
Exercise price per share (in dollars per share)
Significant Accounting Policies
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
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 - Income Taxes
Note 11 - Licensing, Sublicensing and Collaborative Agreements
Income Tax Disclosure [Text Block]
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications
Note 16 - Supplemental Financial Information (Unaudited)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Volatility
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 5 - Property and Equipment - Depreciation and Amortization Expense (Details)
Remaining contractual term in years (Year)
Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details)
Note 7 - Note Payable - Summary of Notes Payable (Details)
Note 7 - Note Payable - Summary of Notes Payable (Details) (Parentheticals)
Note 8 - Capital Stock - Assumptions of Warrant Modification (Details)
Note 8 - Capital Stock - Schedule of Warrants (Details)
Note 8 - Capital Stock - Reserves Shares (Details)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 10 - Income Taxes - Income Tax Expense (Benefit) (Details)
Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Note 10 - Income Taxes - Uncertain Tax Positions (Details)
Note 11 - Licensing, Sublicensing and Collaborative Agreements - Changes in Contract Liabilities (Details)
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan - Schedule of Fair Value of Options Granted - Black-Scholes Option Pricing Model (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan - Consolidated Statement of Operations and Comprehensive Loss (Details)
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan - Summary of Stock Option Activity (Details)
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan - Stock Option Outstanding and Exercisable (Details)
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Finance Lease Obligations (Details)
Note 14 - Commitments and Contingencies - Schedule of Financing Lease Minimum Payments (Details)
Expense related to write-off of deferred offering costs
Amount of expense related to the write-off of deferred offering costs.
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Operating lease in Condensed Consolidated Balance Sheet (Details)
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Operating Lease Cost (Details)
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Minimum Lease Payments (Details)
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Operating Activities in Cash flow Statements (Details)
Note 16 - Supplemental Financial Information (Unaudited) - Quarterly Results of Operations (Unaudited) (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Options exercisable, weighted average exercise price (in dollars per share)
Note payable
Options exercisable at end of period (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Weighted average fair value per share (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)
vtgn_NumberOfSubsidiaries
Number of Subsidiaries
Represents the number of subsidiaries.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstan, weighted average exercise price (in dollars per share)
Options outstan, weighted average exercise price (in dollars per share)
us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Accounts Payable and Accrued Liabilities, Current
Options forfeited, weighted average exercise price (in dollars per share)
Deferred revenue - current portion
Options expired, weighted average exercise price (in dollars per share)
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.
Options granted, weighted average exercise price (in dollars per share)
Options exercised, weighted average exercise price (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)
Accrued expenses
Accrued Liabilities, Current
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)
Options outstanding at beginning of period (in shares)
Options outstanding at end of period (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
Options expired (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_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Purchased for Award (in shares)
us-gaap_PaymentsToAcquireProductiveAssets
Payments to Acquire Productive Assets
Cash used in acquisition of Pherin Pharmaceuticals, Inc. as an asset acquisition
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.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
Consulting Firm [Member]
Represents a related party consulting firm.
Grantee Status [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Grantee Status [Axis]
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]
Share-Based Payment Arrangement, Tranche Two [Member]
us-gaap_Assets
Total assets
Plan Name [Axis]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net loss attributable to common stockholders
Share-Based Payment Arrangement [Text Block]
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.
Business Description and Basis of Presentation [Text Block]
Award Type [Domain]
us-gaap_PreferredStockDividendsIncomeStatementImpact
Accrued dividend on Series B Preferred stock
Net proceeds from exercise of stock options for cash (in shares)
The shares issued during the period for stock options exercised for cash.
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
Net proceeds from exercise of warrants (in shares)
Number of shares issued during the period as a result of the exercise of warrants.
Net proceeds from exercise of warrants
Value of stock issued from the exercise of warrants.
vtgn_ClassOfWarrantOrRightWarrantsExercisedNumber
Class of Warrant or Right, Warrants, Exercised, Number (in shares)
The number of warrants or rights exercised during the period.
Restricted Stock [Member]
Performance Shares [Member]
Share-Based Payment Arrangement, Option [Member]
Warrant [Member]
vtgn_StockSalesAgreementCommissionOnSharesSoldPercentage
Stock Sales Agreement, Commission on Shares Sold, Percentage
Represents the sales commission percentage.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Antidilutive Securities [Axis]
us-gaap_PreferredStockConvertibleSharesIssuable
Preferred Stock, Convertible, Shares Issuable (in shares)
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.
Open Market Sale Agreement [Member]
Represents an Open Market Sale Agreement.
Jefferies LLC [Member]
Represents the other party to the agreement.
The 2020 December Public Offering [Member]
Represents the December 2020 Public Offering.
us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi
Proceeds from Sale of Equity Securities, FV-NI
Lincoln Park Capital Fund [Member]
Represents Lincoln Park Capital Fund.
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation and amortization
Property and equipment, net
Property, plant and equipment
Conversion of Series C Preferred Stock to Common Stock [Member]
Represents conversion of series C preferred stock to common stock.
Amended 2019 Plan [Member]
Represents amended 2019 plan.
us-gaap_Dividends
Dividends, Total
Equity Line [Member]
Represents equity line.
Market price on date of grant (in dollars per share)
The grant-date market price of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
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.
us-gaap_OperatingExpenses
Total operating expenses
General and administrative
General and Administrative Expense
Accrued Interest
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Stock-based compensation expense
us-gaap_AllocatedShareBasedCompensationExpense
Class of Warrant or Right, Modified [Member]
Number of warrants or rights that were modified.
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, Total
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)
Preferred Stock, Shares Outstanding, Ending Balance (in shares)
Current Fiscal Year End Date
Debt Instrument, Interest Rate
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
us-gaap_IncreaseDecreaseInDepositsOutstanding
Security deposits
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]
us-gaap_DividendsPreferredStock
Dividends, Preferred Stock
Document Information [Table]
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
Entity Current Reporting Status
Debt Instrument, Name [Domain]
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
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.
Consultants [Member]
Represents information related to consultants.
us-gaap_CapitalizedContractCostGross
Capitalized Contract Cost, Gross
us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings
Accrued dividends on Series B Preferred stock
us-gaap_CapitalizedContractCostAmortization
Capitalized Contract Cost, Amortization
us-gaap_CapitalizedContractCostImpairmentLoss
Capitalized Contract Cost, Impairment Loss
Stock-based compensation expense
Quarterly Financial Information [Text Block]
Entity Tax Identification Number
Entity Central Index Key
Depreciation and amortization
us-gaap_DepreciationAndAmortization
Entity Registrant Name
Entity [Domain]
Legal Entity [Axis]
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 March 31, 2023 and March 31, 2022
Entity Address, State or Province
Entity Common Stock, Shares Outstanding
Fair value of common stock issued for acquisition of Pherin Pharmaceuticals, Inc.
Fair Value of Common Stock Issued for Asset Acqusition
Represents fair value of common stock issued for asset acquisition.
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.
Fair value of common stock issued for acquisition of Pherin Pharmaceuticals, Inc. as an asset acquisition, net of registration expenses (in shares)
vtgn_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares
Asset Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Number of shares of equity interests issued or issuable to acquire asset.
Reverse Stock Split [Member]
The conversion of a reverse stock split where there is a reduction in the shares outstanding.
Conversion of stock
vtgn_NumberOfContractResearchOrganizations
Number of Contract Research Organizations
Represents number of contract research organizations.
Conversion of stock (in shares)
Net proceeds from exercise of stock options for cash
Amount of stock options exercised for stock issued during period.
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)
Local Phone Number
vtgn_AssetAcquisitionPercentageEligibleToReceiveStockConsideration
Asset Acquisition, Percentage Eligible to Receive Stock Consideration
Percentage of eligible to receive stock consideration for asset acquisition.
vtgn_AssetAcquisitionPercentageOfStockholdersPaidInCash
Asset Acquisition, Percentage of Stockholders Paid in Cash
Represents percentage of stockholders paid in cash for asset acquisition.
Fair value of common stock issued for acquisition of Pherin Pharmaceuticals, Inc. as an asset acquisition, net of registration expenses
Issuance of common stock upon cashless exercise of stock options (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)
Options exercised (in shares)
vtgn_PaymentsToAcquireLaboratoryAndOtherEquipment
Purchases of laboratory and other equipment
Represents cash outflow for laboratory and other equipment.
us-gaap_TableTextBlock
Notes Tables
Officers and Employees [Member]
Represents officers and employees.
vtgn_ProceedsFromLicensingAndCollaborationAgreement
Proceeds from Licensing and Collaboration Agreement
Represents cash inflow from licensing and collaboration agreement.
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan
Stock Issued During Period, Value, Employee Stock Purchase Plan
Capitalized research and development costs
Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development.
Sales Agreement [Member]
Represents Sales Agreement.
Warrants Expiring December 9, 2024 [Member]
Represents warrants expiring December 9, 2024.
vtgn_CapitalizedResearchAndDevelopmentCosts
Capitalized Research and Development Costs
Represents capitalized research and development costs.
Issuance of common stock upon cashless exercise of stock options
Issuance of common stock upon cashless exercise of stock options
Related Party, Type [Axis]
Related Party, Type [Domain]
Conversion of Series D Preferred Stock Into Common Stock [Member]
Represents conversion of series D preferred stock in to common stock.
Options granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Assumption
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Options forfeited (in shares)
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Collaborative Arrangement [Member]
Issuance of common stock (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_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
Stock Issued During Period, Value, New Issues
Property and Equipment, Net [Member]
Represents Property and equipment, net.
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Research and development
Research and Development Expense
Receivable from CRO for cancelled project
Represents prepaid receivable from CRO to cancelled project.
Receivable from collaboration partner
Represents prepaid receivable from collaboration partner.
Money Market Funds [Member]
Conversion of Series A Preferred into Common Stock [Member]
Represents the conversion of Series A Preferred into common stock.
Measurement Input, Share Price [Member]
Cash and Cash Equivalents [Axis]
Debt Disclosure [Text Block]
Depreciation and Amortization, Property, Plant and Equipment [Tabe Text Block]
Tabular disclosure of depreciation and amortization of property, plant and equipment.
Cash and Cash Equivalents [Domain]
Measurement Input, Price Volatility [Member]
Owned Assets [Member]
Represents owned assets.
Changes in operating assets and liabilities:
Accrued dividends on Series B Preferred settled upon conversion by issuance of common stock
The value of the accrued interest on stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.
Leased Assets [Member]
Represents leased assets.
Measurement Input, Risk Free Interest Rate [Member]
Conversion of Series B Preferred Stock Into Common Stock [Member]
Represents the conversion of series B preferred stock into common stock.
Conversion of Series B Preferred Stock Into Registered Common Stock [Member]
Represents the conversion of series B preferred stock into registered common stock.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Conversion of Series B Preferred Stock Into Unregistered Common Stock [Member]
Represents the conversion of series B preferred stock into unregistered common stock.
Subsequent Event [Member]
Measurement Input, Expected Dividend Rate [Member]
Non-current operating lease obligation
Operating lease obligation - non-current portion
Measurement Input, Expected Term [Member]
Conversion of Accrued Dividends on Series B Preferred Stock into Common Stock [Member]
Represents the conversion of accrued dividends on series B preferred stock into common stock.
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]
Measurement Input, Exercise Price [Member]
Current operating lease obligation
Operating lease obligation - current portion
Subsequent Event Type [Domain]
Financing lease obligation - current portion
Less current portion
Warrants Expiring July 25, 2025 [Member]
Represents warrants expiring July 25, 2025.
Financing lease obligation - non-current portion
Deferred contract acquisition costs - non-current portion
Subsequent Events [Text Block]
Security deposits
Plan 2019 [Member]
Represents 2019 plan.
Right-of-use asset – operating lease
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease expense
us-gaap_FinanceLeaseLiability
Present value of minimum lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest
us-gaap_FinanceLeasePrincipalPayments
Repayment of financing lease obligations
Measurement Input Type [Axis]
2026
Projects for Certain CNS Pipeline Candidates [Member]
Represents projects for certain of CNS pipeline candidates.
Measurement Input Type [Domain]
2027
2028
Net book value of office equipment subject to financing lease
Net book value of office equipment subject to financing lease
Fair Value Measurement, Policy [Policy Text Block]
2024
2025
Share-Based Payment Arrangement, Employee [Member]
Assets and Liabilities, Lessee [Table Text Block]
Tabular disclosure of lessee's assets and liabilities.
Warrant modification expense
Fair Value Adjustment of Warrants
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]
us-gaap_Revenues
Total revenue
Operating expenses:
Comprehensive Income, Policy [Policy Text Block]
Income Tax, Policy [Policy Text Block]
Research, Development, and Computer Software, Policy [Policy Text Block]
us-gaap_ConversionOfStockAmountConverted1
Conversion of Stock, Amount Converted
us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Stockholders' Equity Note, Stock Split, Conversion Ratio
us-gaap_ConversionOfStockSharesIssued1
Conversion of Stock, Shares Issued (in shares)
us-gaap_FinancialLiabilitiesFairValueDisclosure
Financial Liabilities Fair Value Disclosure
us-gaap_ConversionOfStockSharesConverted1
Conversion of Stock, Shares Converted (in shares)
Exercise Price Range 1 [Member]
Represents exercise price range 1.
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
Exercise Price Range 2 [Member]
Represents exercise price range 2.
Stock Conversion Description [Axis]
Exercise Price Range 3 [Member]
Represents exercise price range 3.
Conversion of Stock, Name [Domain]
Exercise Price Range 4 [Member]
Represents exercise price range 4.
us-gaap_AssetsCurrent
Total current assets
us-gaap_CashAndCashEquivalentsFairValueDisclosure
Cash and Cash Equivalents, Fair Value Disclosure
Equity [Text Block]
vtgn_ResearchAndDevelopmentExpenseNoncash
Research and Development Expense, Noncash
Represents noncash research and development expense.
Tax effect of warrant modifications
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to warrant modification.
Expired net operating loss carryforwards
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to expired net operating loss carryforward.
Exercise Price Range 5 [Member]
Represents exercise price range 5.
Exercise Price Range 6 [Member]
Represents exercise price range 6.
Treasury stock, shares (in shares)
Compensation Related Costs, Policy [Policy Text Block]
Operating lease Right-of-Use asset
vtgn_DeferredTaxAssetsOperatingLeaseRightOfUseAssets
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from operating lease, right of use assets.
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Common stock, $0.001 par value; 325,000,000 shares authorized at March 31, 2023 and March 31, 2022; 7,315,404 and 6,889,221 shares issued at March 31, 2023 and March 31, 2022, 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)
Stockholders' Equity, Policy [Policy Text Block]
Deferred contract acquisition costs - current portion
Reserved for future issuance (in shares)
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
Statistical Measurement [Domain]
Cash paid for amounts included in the measurement of lease liabilities
Maximum [Member]
Supplemental disclosure of noncash activities:
Minimum [Member]
us-gaap_DeferredOfferingCosts
Deferred Offering Costs
Product and Service [Axis]
Other Assets
Product and Service [Domain]
vtgn_ClassOfWarrantOrRightTerm
Class of Warrant or Right, Term (Year)
Represents term of warrant or right.
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets net of valuation allowance
Statistical Measurement [Axis]
Preferred stock, $0.001 par value; 10,000,000 shares authorized at March 31, 2023 and March 31, 2022: no shares outstanding at March 31, 2023 and March 31, 2022
Employee Stock Purchase Plan 2019 [Member]
Represents employee stock purchase plan 2019.
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax asset (liability)
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Pre-modification Warrants [Member]
Represents pre-modification warrants.
Property, Plant and Equipment Disclosure [Text Block]
The Winter 2019 Warrant Modification [Member]
Represents the winter 2019 warrant modification.
Post-modification Warrants [Member]
Represents post-modification warrants.
Property, Plant and Equipment [Table Text Block]
vtgn_ClassOfWarrantOrRightWeightedAverageFairValuePerShare
Weighted average fair value per share (in dollars per share)
the weighted average fair value per share of warrants or rights.
Net proceeds from exercise of warrants, net of underlying share registration expenses
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Preferred Stock, shares authorized (in shares)
Preferred Stock, Shares Authorized (in shares)
i3 Strategy Partners [Member]
Represents i3 Strategy Partners.
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Increase in fair value attributable to warrant modification
Amount of increase in additional paid in capital (APIC) resulting from the modification of warrants.
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
Joanne Curley [Member]
Represents Joanne Curley.
Deductions [Member]
Represents deductions.
Pherin Acquisition [Member]
Represents Pherin Acquisition.
us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)
Sublicense revenue
vtgn_DeferredTaxAssetsTaxableIncomeLimitation
Deferred Tax Assets, Taxable Income Limitation
Represents income tax limitation.
Advisory Services [Member]
Represents advisory services.
Collaborative Arrangement, License Agreements With Pherin Pharmaceuticals, Inc [Member]
Information regarding license agreements with pherin Pharmaceuticals.
vtgn_RelatedPartyTransactionMonthlyFee
Related Party Transaction, Monthly Fee
Amount of monthly fee of related party transaction.
Consulting Services [Member]
Represents consulting services.
Deferred revenue
Dr. Mark Smith [Member]
Represents Dr. Mark Smith.
Additions [Member]
Represents Additions.
Fair Value Hierarchy and NAV [Domain]
Office Furniture And Equipment [Member]
Represents office furniture and equipment.
Fair Value, Inputs, Level 1 [Member]
vtgn_SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfSharesAuthorizedTransferred
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized, Transferred (in shares)
Represents authorized shares that are transferred to another plan.
vtgn_UpfrontLicensePayment
Upfront License Payment
Represent upfront license revenue.
Basis differences in property and equipment
us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Fair Value Hierarchy and NAV [Axis]
New Independent Members of the Board [Member]
Represents the new members of the board.
Accruals and reserves
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Common Stock Purchase Agreement With Lincoln Park Capital Fund [Member]
Represents a purchase agreement with Lincoln Park Capital Fund.
Newly Hired Employee [Member]
Represents employees who were recently hired.
Independent Members of the Board [Member]
Represents the independent members of the board.
vtgn_ClassOfWarrantOrRightExpiredDuringPeriod
Class of Warrant or Right, Expired During Period (in shares)
Represents the class of warrant or right that expired during the period.
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life (Year)
vtgn_ClassOfWarrantOrRightExpiredDuringPeriodExercisePrice
Class of Warrant or Right, Expired During Period, Exercise Price (in dollars per share)
Represents the class of right or warrant that expired during the period exercise price.
vtgn_SharebasedCompensationArrangementBySharebasedPaymentAwardLimitationOnContributionOfCompensation
Share-based Compensation Arrangement by Share-based Payment Award, Limitation on Contribution of Compensation
Represents the limitations on the contribution of compensation.
Interest income, net
us-gaap_PreferredStockDividendRatePercentage
Preferred Stock, Dividend Rate, Percentage
Cash flows from operating activities:
Expense related to acquisition of Pherin Pharmaceuticals, Inc. recorded as an asset acquisition
Expense Related to Asset Acquisition
Amount of expense related to asset acquisition.
Revenue [Policy Text Block]
Statement [Line Items]
Stock Incentive Plans [Member]
Represents all of the stock incentive plans.
Stock based compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Additional paid-in capital
vtgn_CommonStockSharesIssuable
Common Stock, Shares, Issuable (in shares)
Represents the authorized shares that are still issuable.
Manufacturing Facility [Member]
Stockholders’ equity:
Property, Plant and Equipment, Policy [Policy Text Block]
Long-Lived Tangible Asset [Axis]
Finance Lease, Assets and Liabilities [Table Text Bock]
Discloser of Finance Lease, Assets and Liabilities.
Long-Lived Tangible Asset [Domain]
Net operating loss carryovers
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Research and development credit carryforwards
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Current assets:
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year
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 (used in) provided by financing activities
us-gaap_Liabilities
Total liabilities
Commitments and contingencies (Note 14)
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
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
us-gaap_AccountsPayableCurrentAndNoncurrent
Accounts Payable
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Basis differences in property and equipment
us-gaap_AccruedPayrollTaxesCurrentAndNoncurrent
Accrued Payroll Taxes
us-gaap_ProceedsFromWarrantExercises
Proceeds from Warrant Exercises
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]
Preferred Stock [Member]
Equity Components [Axis]
Equity Component [Domain]
Schedule of Stock by Class [Table Text Block]
Prepaid Expenses and Other Current Assets [Member]
Class of Warrant or Right, Exercise Price (in dollars per share)
Class of Warrant or Right, Exercise Price of Warrants or Rights (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)
Class of Warrant or Right, Outstanding (in shares)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income taxes
us-gaap_DeferredRevenueCurrent
Deferred revenue - current portion
us-gaap_DeferredRevenueNoncurrent
Deferred revenue - non-current portion
ICFR Auditor Attestation Flag
State and Local Jurisdiction [Member]
us-gaap_DeferredRevenue
Total
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Domestic Tax Authority [Member]
Office Equipment [Member]
Document Annual Report
Technology Equipment [Member]
vtgn_OperatingLossCarryforwardsSubjectToExpiration
Operating Loss Carryforwards, Subject to Expiration
Amount of operating loss carryforwards that are subject to expiration.
Cash and Cash Equivalents, Policy [Policy Text Block]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Entity Incorporation, State or Country Code
General and Administrative Expense [Member]
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Unrecognized benefit - beginning of period
Unrecognized benefit - end of period
Corporate Development and Public Relations Advisory Services [Member]
Represents corporate development and public relations advisory services.
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Document Transition Report
vtgn_OperatingLossCarryforwardsNotSubjectToExpiration
Operating Loss Carryforwards, Not Subject to Expiration
Amount of operating loss carryforwards that are not subject to expiration dates.
Entity Interactive Data Current
Related Party [Member]
Related and Nonrelated Party Status [Domain]
Security Exchange Name
Related and Nonrelated Party Status [Axis]
Current period tax position increases
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]
Auditor Name
Auditor Firm ID
Auditor Location
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
us-gaap_RepaymentsOfNotesPayable
Repayment of note payable
Market price per share (in dollars per share)
Share Price (in dollars per share)
Research Tax Credit Carryforward [Member]
us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization
Accumulated depreciation
Antidilutive Securities (in shares)
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
Office equipment subject to financing lease
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Statement [Table]
Statement of Financial Position [Abstract]
Weighted average shares used in computing basic and diluted net loss per common share (in shares)
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
All other
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Income tax expense
Basic and diluted net loss per common share (in dollars per share)
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Change in valuation allowance (federal only)
Statement of Cash Flows [Abstract]
Lease Contractual Term [Domain]
Statement of Stockholders' Equity [Abstract]
Lease Contractual Term [Axis]
Income Statement [Abstract]
Schedule of Accrued Liabilities [Table Text Block]
Quarterly Financial Information [Table Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDue
Future minimum lease payments
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive
2028
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Tax effect of other non-deductible items
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Less imputed interest included in minimum lease payments
us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
2024
us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo
2025
us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree
2026
us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment
Tax effect of research and development credits
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour
2027
Tax effect of stock compensation
Number of option shares (in shares)
Represents number of option shares related to share-based compensation arrangement by share-based payment award, fair value assumptions.
Pre-modified Stock Option Plan [Member]
Reprensets pre-modified stock option plan.
Asset Acquisition [Axis]
Post-modified Stock Option Plan [Member]
Represents post-modified stock option plan.
Finance Lease, Liability, to be Paid, Maturity [Table Text Block]
us-gaap_AssetAcquisitionConsiderationTransferredTransactionCost
Asset Acquisition, Consideration Transferred, Transaction Cost
State income taxes, net of federal benefit
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:
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Computed expected tax benefit
Asset Acquisition [Domain]
Change in Accounting Estimate by Type [Axis]
us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Change in Accounting Estimate, Type [Domain]
Accrued dividends on Series B Preferred
vtgn_RelatedPartyTransactionReversedExpensesFromTransactionsWithRelatedParty
Related Party Transaction, Reversed Expenses from Transactions with Related Party
Represents related party transaction, reversed expenses from transactions with related party.
Series C Preferred Stock [Member]
Series D Preferred Stock [Member]
Series A Preferred Stock [Member]
Series B Preferred Stock [Member]
Research, Development, and Computer Software Disclosure [Text Block]
Amortization of operating lease right-of-use asset
us-gaap_StockholdersEquity
Total stockholders’ equity
Balances
Balances
Deferred revenue - non-current portion
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]
Class of Stock [Domain]
Promissory Note 3.88% [Member]
Promissory Note 3.88%.
Principal balance
Amount of principal balance of debt instrument.
Weighted average exercise price (in dollars per share)
Weighted average remaining years until expiration (Year)
Number exercisable shares (in shares)
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable (in shares)
Exercisable weighted average exercise price (in dollars per share)
Exercise price, upper limit (in dollars per share)
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share)
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance (in shares)
Exercise Price Range [Axis]
Exercise Price Range [Domain]
Exercise price, lower limit (in dollars per share)
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share)