Document And Entity Information
Expected dividend yield
Note To Financial Statement Details Textual
Exercise price (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
Note 6 - Accrued Expenses
Note 8 - Capital Stock
Note 10 - Income Taxes
Non-current liabilities:
Note 11 - Licensing, Sublicensing and Collaborative Agreements
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan
Income Tax Disclosure [Text Block]
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications
Note 16 - Supplemental Financial Information (Unaudited)
Note 3 - Summary of Significant Accounting Policies - Basic and Diluted Net Loss (Details)
Note 3 - Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities Excluded From Earnings Per Share Computation (Details)
Volatility
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 - Schedule of Property and Equipment (Details)
Note 5 - Property and Equipment - Depreciation and Amortization Expense (Details)
Note 5 - Property and Equipment - Schedule of Assets Subject to Financing Lease (Details)
Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details)
Expected term (years) (Year)
Note 8 - Capital Stock - Schedule of Warrants (Details)
Note 8 - Capital Stock - Reserves Shares (Details)
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)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
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 - Consolidated Statement of Operations and Comprehensive Loss (Details)
Accrued dividends on Series B Preferred Stock
Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.
Note 12 - Stock Option Plans, Employee Stock Purchase Plan, and 401(k) Plan - Black-Scholes Option Pricing (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)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 14 - Commitments, Contingencies, Guarantees and Indemnifications - Finance Lease Obligations (Details)
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)
Expense related to write-off of deferred offering costs
Amount of expense related to the write-off of deferred offering costs.
Note 16 - Supplemental Financial Information (Unaudited) - Quarterly Results of Operations (Unaudited) (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Net proceeds from issuance of common stock and warrants, including option exercises
The cash inflow from the issuance of common stock, warrants, and the options exercises.
Options exercisable, weighted average exercise price (in dollars per share)
Options exercisable at end of period (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Fair value per share at grant date (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, Total
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, Total
vtgn_ProceedsFromIssuanceOfDebtAndEquitySecurities
Proceeds from Issuance of Debt and Equity Securities
The cash inflow from the issuance of debt and equity securities.
Accrued compensation
Accounts payable
vtgn_ProceedsFromSaleOfSecuritiesNetOfExpenses
Proceeds from Sale of Equity, Net of Expenses
The cash inflow from the sale of securities, net of underwriting discounts, commissions, and offering expenses.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (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_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_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of laboratory and other equipment
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Day)
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]
Cash paid for income taxes
Laboratory Equipment [Member]
Represents laboratory equipment.
Weighted average shares used in computing basic and diluted net loss attributable to common stockholders per common share (in shares)
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_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
Net loss attributable to common stockholders for basic and diluted earnings per share
Net loss attributable to common stockholders
vtgn_StockPurchaseAgreementMaximumValueOfCommittedShares
Stock Purchase Agreement, Maximum Value of Committed Shares
Represents the maximum value of the shares in the purchase agreement.
vtgn_StockPurchaseAgreementPurchasePeriod
Stock Purchase Agreement, Purchase Period (Month)
Represents the purchase period of the agreement.
us-gaap_CapitalizedContractCostNet
Capitalized Contract Cost, Net, Total
Share-Based Payment Arrangement [Text Block]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
vtgn_RevenueRemainingNumberOfCombinedPerformanceObligations
Revenue, Remaining Number of Combined Performance Obligations
Number of,combined performance obligations.
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 (Day)
Represents the payment period for the payment under the collaborative arrangement.
Business Description and Basis of Presentation [Text Block]
Award Type [Domain]
us-gaap_PreferredStockDividendsIncomeStatementImpact
Accrued dividends 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.
us-gaap_PreferredStockConvertibleConversionPrice
Preferred Stock, Convertible, Conversion Price (in dollars per share)
Jefferies LLC [Member]
Represents the other party to the agreement.
The 2020 December Public Offering [Member]
Represents the December 2020 Public Offering.
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 property and investing activities:
us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Related Party Transaction, Expenses from Transactions with Related Party
Accounts payable and accrued expenses
Related Party Transactions Disclosure [Text Block]
us-gaap_IncomeTaxExpenseBenefit
Income taxes
us-gaap_OperatingExpenses
Total operating expenses
General and administrative
General and Administrative Expense, Total
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value, Total
Stock-based compensation expense
us-gaap_AllocatedShareBasedCompensationExpense
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]
Reclassification, Comparability Adjustment [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)
Class of Warrant or Right Outstanding, ExpirationPeriod, March 2023 [Member]
Represents the expiration period of class of warrant or right outstanding.
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
us-gaap_DividendsPreferredStockPaidinkind
Dividends, Preferred Stock, Paid-in-kind
Document Fiscal Period Focus
Operating lease cost
Document Fiscal Year Focus
Lease, Cost [Table Text Block]
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, Total
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_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
Beneficial conversion feature on Series D Preferred stock
Entity Central Index Key
Depreciation and amortization
us-gaap_DepreciationAndAmortization
Entity Registrant Name
Entity [Domain]
Legal Entity [Axis]
Entity Address, Address Line One
Entity Address, City or Town
Entity Address, Postal Zip Code
Supplemental disclosure of cash flow activities:
Entity Address, State or Province
us-gaap_TreasuryStockValue
Treasury stock, at cost, 135,665 shares of common stock held at March 31, 2022 and 2021
Entity Common Stock, Shares Outstanding
us-gaap_ProfessionalFees
Professional Fees
Trading Symbol
Schedule of Finance Leased Assets [Table Text Block]
Tabular disclosure of assets subject to finance lease.
us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Stock Issued During Period, Shares, Acquisitions (in shares)
Conversion of stock
Conversion of stock (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities (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)
Local Phone Number
us-gaap_StockIssuedDuringPeriodValueAcquisitions
Stock Issued During Period, Value, Acquisitions
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)
us-gaap_TableTextBlock
Notes Tables
Sale of common stock pursuant to 2019 Employee Stock Purchase Plan
Proceeds from sale of units of common stock and warrants for cash in private placements
Amount of sale of common stock warrants for stock issued during period.
Proceeds from sale of units of common stock and warrants for cash in private placements (in shares)
Number of shares for stock issued for period for sale of common stock warrants.
Issuance of common stock upon cashless exercise of stock options
Issuance of common stock upon cashless exercise of stock options
Related Party [Axis]
Related Party [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_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Options forfeited (in shares)
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Unregistered Shares [Member]
Represents unregistered shares.
Issuance of common stock (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Issuance of common stock at fair value for professional services
Stock Issued During Period, Value, Issued for Services
Issuance of common stock at fair value for professional services (in shares)
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
Stock Issued During Period, Value, New Issues
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Accumulated deficit
Retained Earnings (Accumulated Deficit), Total
Research and development
Research and Development Expense, Total
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.
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]
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.
Conversion of Series B Preferred Stock Into Common Stock [Member]
Represents the conversion of series B preferred stock into common stock.
Paycheck Protection Program CARES Act [Member]
Represents loan designed to provide funds for small businesses to keep their employees on the payroll.
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.
Warrants Expiring December 9, 2022 [Member]
Represents warrants expiring December 9, 2022.
Subsequent Event [Member]
Non-current operating lease obligation
Operating lease obligation - non-current portion
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
Warrants Expiring March 7, 2023 [Member]
Represents warrants expiring March 7, 2023.
Warrants Expiring March 3, 2023 [Member]
Represents warrants expiring March 3, 2023.
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.
Warrants Expiring December 31, 2022 [Member]
Represents warrants expiring December 31, 2022.
Deferred contract acquisition costs - non-current portion
Subsequent Events [Text Block]
Security deposits
Warrants Expiring October 5, 2022 [Member]
Represents warrants expiring October 5, 2022.
Plan 2019 [Member]
Represents 2019 plan.
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
Support to Development of PH94B, PH10 and AV-101 [Member]
Represents support to the development of PH94B, PH10 and AV-101.
2025
Projects for Certain CNS Pipeline Candidates [Member]
Represents projects for certain of CNS pipeline candidates.
2026
2027
Net book value of office equipment subject to financing lease
Net book value
Thereafter
Fair Value Measurement, Policy [Policy Text Block]
2023
2024
Share-Based Payment Arrangement, Employee [Member]
Assets and Liabilities, Lessee [Table Text Block]
Tabular disclosure of lessee's assets and liabilities.
Lessee, Operating Lease, Liability, 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_ConversionOfStockSharesIssued1
Conversion of Stock, Shares Issued (in shares)
us-gaap_FinancialLiabilitiesFairValueDisclosure
Financial Liabilities Fair Value Disclosure, Total
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
Stockholders' Equity Note Disclosure [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.
Exercise Price Range 7 [Member]
Represents exercise price range 7.
Exercise Price Range 8 [Member]
Represents exercise price range 8.
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.
Common stock, $0.001 par value; 325,000,000 shares authorized at March 31, 2022 and 2021; 206,676,620 shares and 180,751,234 shares issued at March 31, 2022 and March 31, 2021, 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]
Amended and Restated 2016 and 2019 Stock [Member]
Represents amended and restated 2016 and 2019 stock.
Deferred contract acquisition costs - current portion
vtgn_PercentageOfCommonSharesOutstanding
Percentage of Common Shares Outstanding
Represents percentage of common shares outstanding.
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]
vtgn_ClassOfWarrantOrRightIssuedInPeriod
Class of Warrant or Right, Issued in Period (in shares)
The number of warrant or rights issued during period.
Other Assets
Product and Service [Domain]
vtgn_ClassOfWarrantOrRightTerm
Class of Warrant or Right, Term (Year)
Represents term of warrant or right.
us-gaap_DeferredTaxAssetsNet
Net deferred tax assets
Statistical Measurement [Axis]
The 2020 Private Placement [Member]
Represents the 2020 private placement.
The August 2020 Public Offering [Member]
represents the August 2020 public offering
Maxim Group, LLC [Member]
Represents Maxin group, LLC.
Preferred stock
Employee Stock Purchase Plan 2019 [Member]
Represents employee stock purchase plan 2019.
Preferred Stock, shares issued (in shares)
Cash paid for interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
vtgn_PreferredStockBeneficialConversionFeatureTotal
Preferred Stock, Beneficial Conversion Feature, Total
Represents the aggerate total of the beneficial conversion feature.
Property, Plant and Equipment Disclosure [Text Block]
The Winter 2019 Warrant Modification [Member]
Represents the winter 2019 warrant modification.
Property, Plant and Equipment [Table Text Block]
vtgn_ProceedsFromWarrantExercisesNet
Net proceeds from exercise of warrants
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Preferred Stock, shares authorized (in shares)
Preferred Stock, Shares Authorized (in shares)
vtgn_ProceedsFromIssuanceOfCommonStockNetOfDiscountCommissionsAndOffering
Proceeds From Issuance of Common Stock, Net of Discount, Commissions and Offering
Represents the net proceeds for issuance of common stock.
Jefferies L.L.C and William Blair & Company, L.L.C [Member]
Represents the joint counter part of Jefferies L.L.C and William & Blair L.L.C.
The December 2020 Public Offering [Member]
Represents the Dec. 2020 public offering.
Preferred Stock, Par or Stated Value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
vtgn_PreferredStockConvertibleConversionPriceDifferencePerShare
Preferred Stock, Convertible, Conversion Price, Difference Per Share (in dollars per share)
Represents difference between conversion price and stated par value.
Insurance
Deductions [Member]
Represents deductions.
us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)
Revenue
vtgn_DeferredTaxAssetsTaxableIncomeLimitation
Deferred Tax Assets, Taxable Income Limitation
Represents income tax limitation.
Collaborative Arrangement, License Agreements With Pherin Pharmaceuticals, Inc [Member]
Information regarding license agreements with pherin Pharmaceuticals.
vtgn_SupportPayments
Support Payments
Represents the support payments required for licensing fees.
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.
vtgn_ProceedsFromUpfrontLicensePayment
Proceeds From Upfront License Payment
Represents cash proceeds from upfront license payment.
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.
Common Stock Purchase Agreement With Lincoln Park Capital Fund, Commitment Shares [Member]
Represents a purchase commitment with Lincoln Park Capital Fund.
Accruals and reserves
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Investors, Public Relations, and Scientific Consultants [Member]
Represents Investors, Public Relations, and Scientific Consultants.
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.
Common Stock Purchase Agreement With Lincoln Park Capital Fund, Initial Purchase [Member]
Represents the initial purchase agreement with Lincoln Park Capital Fund.
Independent Members of the Board [Member]
Represents the independent members of the board.
New Research and Development Employee [Member]
Represents New Research and Development Employee.
Independent Members of the Board and Employees [Member]
Represents Independent Members of the Board and Employees.
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life (Year)
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:
Revenue [Policy Text Block]
us-gaap_WarrantsAndRightsOutstanding
Warrants and Rights Outstanding
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.
Deemed dividend from beneficial conversion feature of Series D Preferred stock
Amount of increase (decrease) in additional paid in capital (APIC) resulting from recognition of deemed dividend on stock with a beneficial conversion feature.
Manufacturing Facility [Member]
Stockholders’ equity:
Property, Plant and Equipment, Policy [Policy Text Block]
Other income
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 period
Cash and cash equivalents at end of period
License [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase (decrease) in cash and cash equivalents
Over-Allotment Option [Member]
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash 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_ContractWithCustomerLiabilityRevenueRecognized
Contract with Customer, Liability, Revenue Recognized
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, Total
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_AccruedPayrollTaxesCurrentAndNoncurrent
Accrued Payroll Taxes
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity, Total
us-gaap_ProceedsFromWarrantExercises
Proceeds from Warrant Exercises
us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Proceeds from Issuance of Private Placement
Retained Earnings [Member]
us-gaap_ProceedsFromStockOptionsExercised
Proceeds from Stock Options Exercised
Net proceeds from sale of common stock
Proceeds from Issuance of Common Stock
Treasury Stock [Member]
Net proceeds from issuance of common stock and Series D Preferred stock
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]
Class of Warrant or Right, Outstanding (in shares)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income taxes
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
Deferred Revenue – current portion
Deferred Revenue – non-current portion
ICFR Auditor Attestation Flag
State and Local Jurisdiction [Member]
Total
Deferred Revenue, Total
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Domestic Tax Authority [Member]
Office Equipment [Member]
Document Annual Report
Warrants Expiring December 13, 2022 [Member]
Represents warrants expiring December 13, 2022.
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
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Ending Balance
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.
General and Administrative Expense [Member]
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
us-gaap_OpenTaxYear
Open Tax Year
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
Security Exchange Name
Current period tax position increases
Title of 12(b) Security
Research and Development Expense [Member]
Income Statement Location [Axis]
Income Statement Location [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement Disclosure [Text Block]
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
us-gaap_RepaymentsOfNotesPayable
Repayments of Notes Payable
Repayment of notes payable, including Payroll Protection Plan note
Research Tax Credit Carryforward [Member]
us-gaap_SharePrice
Share Price (in dollars per share)
us-gaap_PreferredStockConvertibleDownRoundFeatureDecreaseInNetIncomeLossToCommonShareholderAmount
Beneficial conversion feature on Series D Preferred
us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization
Accumulated depreciation
Antidilutive Securities (in shares)
Proceeds from issuance of note under Payroll Protection Plan
Proceeds from Notes Payable, Total
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 basic and diluted common shares outstanding (in shares)
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Income tax expense
Basic and diluted net loss attributable to common stockholders 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]
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
Schedule of Accrued Liabilities [Table Text Block]
Quarterly Financial Information [Table Text Block]
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
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_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment
Tax effect of research and development credits
Tax effect of stock compensation
State income taxes, net of federal benefit
us-gaap_LiabilitiesNoncurrent
Total non-current liabilities
Cash flows from financing activities:
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Computed expected tax benefit
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
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
Class of Stock [Axis]
Class of Stock [Domain]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Weighted average exercise price (in dollars per share)
Weighted average remaining years until expiration (Year)
Number exercisable shares (in shares)
Exercisable weighted average exercise price (in dollars per share)
Exercise price, higher 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)
Auditor Name
Auditor Location
Auditor Firm ID