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Warrants Issued In Connection with Equity Financing Warrants Issued In Connection With Equity Financing [Policy Text Block] Disclosure of accounting policy for warrant issued in connection with equity financing. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Negotiation Agreement Negotiation Agreement [Member] Negotiation Agreement Class of Warrant or Right [Table] Class of Warrant or Right [Table] % Effective Income Tax Rate Reconciliation, Percent [Abstract] Schedule of Marketable Securities Debt Securities, Available-for-Sale [Table Text Block] Auditor [Abstract] Auditor Leases [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province Issuance of common stock upon exercise of stock options (in shares) Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross PEO Total Compensation Amount PEO Total Compensation Amount Upfront license payment vtgn_UpfrontLicensePayment Represent upfront license revenue. 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Recently Adopted Accounting Principles and Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Net Loss Per Share Earnings Per Share, Policy [Policy Text Block] Accretion of marketable securities Accretion on Marketable Securities Accretion on Marketable Securities Deferred sublicense revenue, net of deferred contract acquisition costs Increase (Decrease) in Contract with Customer, Liability Loss on disposal of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Schedule of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Exercise price per share (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Property and Equipment, Net Property, Plant, and Equipment [Text Block] Collaborative Arrangement, AffaMed Agreement Collaborative Arrangement, AffaMed Agreement [Member] Collaborative arrangement transaction with AffaMed. Schedule of Future Lease Payments for Non-Cancellable Operating Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Capitalized research and development costs Capitalized research and development costs Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development. 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Total liabilities Liabilities Trading Symbol Trading Symbol Warrants expired during period (in shares) Class Of Warrant Or Right, Expired During Period Represents the class of warrant or right that expired during the period. Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits [Roll Forward] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Collaborative arrangement, upfront payment Collaborative Arrangement, Upfront Payment Collaborative Arrangement, Upfront Payment Promissory Note Promissory Note [Member] Represents information related to promissory note. Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Total compensation cost not yet recognized Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Company Selected Measure Name Company Selected Measure Name Sale of Stock [Domain] Sale of Stock [Domain] Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-Sale Income Tax Disclosure [Abstract] Issuance of common stock upon exercise of Pre-Funded Warrants Stock Issued During Period, Value, Shares And Warrants, New Issues Stock Issued During Period, Value, Shares And Warrants, New Issues Unrealized gain (loss) on marketable securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Basis differences in property and equipment Deferred Tax Assets, Property, Plant and Equipment Related Party Transactions [Abstract] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, 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Expense (Benefit), Continuing Operations Income tax expense Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid All Executive Categories All Executive Categories [Member] Operating lease liability Increase (Decrease) in Operating Lease Liability Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Capital Unit [Line Items] Capital Unit [Line Items] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Depreciation Depreciation Plan Name [Domain] Plan Name [Domain] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Outstanding at beginning of period (in dollars per share) Outstanding at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Right-of-use asset - operating lease Operating Lease, Right-of-Use Asset Lease renewal term Lessee, Operating Lease, Renewal Term Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Shares available for issuance under the 2019 Employee Stock Purchase Plan Employee Stock Purchase Plan 2019 [Member] Represents employee stock purchase plan 2019. Expiration Date Trading Arrangement Expiration Date Auditor Name Auditor Name Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents held in money market funds Cash and Cash Equivalents, Fair Value Disclosure Outstanding, weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Financial liabilities measured at fair value Financial Liabilities Fair Value Disclosure Repayment of note payable Repayments of Notes Payable Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Common stock, shares authorized (in shares) Common Stock, Shares Authorized Manufacturing equipment Manufacturing Equipment [Member] Represents manufacturing equipment. Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Intangibles Deferred Tax Liabilities, Intangible Assets Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Entity Voluntary Filers Entity Voluntary Filers Related Party Transaction [Axis] Related Party Transaction [Axis] Recurring Fair Value, Recurring [Member] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Outstanding warrants subject to anti-dilution protection feature (in shares) Class of Warrant or Right, Outstanding Warrants Subject to Anti-Dilution Protection Feature Class of Warrant or Right, Outstanding Warrants Subject to Anti-Dilution Protection Feature Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Property and Equipment Property, Plant, and Equipment [Policy Text Block] Notes Payable Debt Disclosure [Text Block] Equity, Capital Unit or Share [Table] Equity, Capital Unit or Share [Table] Sublicense Fees Sublicense Fees Represents sub-license fees. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Proceeds net of expenses Sale of Stock, Consideration Received on Transaction Lease for Office Equipment Fully-depreciated Lease for Office Equipment Fully-depreciated [Member] Lease for Office Equipment Fully-depreciated. Adoption Date Trading Arrangement Adoption Date Proceeds from issuance of common stock and warrants, net of issuance costs Proceeds from Issuance or Sale of Equity Counterparty Name [Domain] Counterparty Name [Domain] Interest rate Debt Instrument, Interest Rate, Stated Percentage Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Present value of operating lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Vested and Expected to Vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest [Abstract] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Tax effect of other non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Research and Development Expenses and Accruals Research, Development, and Computer Software, Policy [Policy Text Block] Interest income, net Interest Income (Expense), Nonoperating Commitments, Contingencies, Guarantees and Indemnifications Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Antidilutive securities excluded from computation of earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Auditor Location Auditor Location Entity Central Index Key Entity Central Index Key Accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Income Taxes Income Tax, Policy [Policy Text Block] Net cash used in operating activities Cash used in operations Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Computed expected tax benefit Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Unrealized Gains Debt Securities, Available-for-Sale And Cash And Cash Equivalents, Accumulated Gross Unrealized Gain, Debt Securities, Available-for-Sale And Cash And Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax Income Statement [Abstract] Income Statement [Abstract] Stockholders’ equity: Equity, Attributable to Parent [Abstract] Sale of common stock pursuant to 2019 Employee Stock Purchase Plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Operating expenses: Operating Expenses [Abstract] Dotson Consulting Agreement Dotson Consulting Agreement [Member] Dotson Consulting Agreement Monthly installments Debt Instrument, Periodic Payment Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Schedule of Fair Value of Stock Options Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Total fair value of options vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Laboratory equipment Laboratory Equipment [Member] Represents laboratory equipment. Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] City Area Code City Area Code Restricted Stock Restricted Stock [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Amortization of operating lease right-of-use asset Operating Lease, Right-of-Use Asset, Periodic Reduction Collaborative Arrangement Collaborative Arrangement [Member] Name Forgone Recovery, Individual Name Unrecognized share-based compensation cost, period of recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Jefferies LLC Jefferies LLC [Member] Represents the other party to the agreement. Conversion of Warrants Conversion of Warrants [Member] Conversion of Warrants Unrealized loss on marketable securities available-for-sale, net OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Schedule of Stock-Based Compensation Expense Recognized Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Sale of common stock pursuant to 2019 Employee Stock Purchase Plan Stock Issued During Period, Value, Employee Stock Purchase Plan T2 Warrants T2 Warrants [Member] T2 Warrants Other assets Increase (Decrease) in Other Operating Assets Issuance of common stock under Open Market Sale Agreement, net of issuance costs (in shares) Shares issued (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Total stock-based compensation expense Share-Based Payment Arrangement, Expense Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Payables and Accruals [Abstract] Accumulated Deficit Retained Earnings [Member] Operating lease liabilities - non-current portion Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Software Software, In-Development, Internally Developed, and Purchased [Member] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Loss per share, diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Research and development Research and Development Expense Lease Contractual Term [Domain] Lease Contractual Term [Domain] Adjustments to reconcile net loss to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Deferred Offering Costs Deferred Offering Costs [Policy Text Block] Deferred Offering Costs Share-Based Payment Arrangement [Abstract] Offering period Share-Based Compensation Arrangement By Share-based Payment Award, Purchase Period Share-Based Compensation Arrangement By Share-based Payment Award, Purchase Period Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Warrants With Exercise Price of $0.001 Warrants With Exercise Price of $0.001 [Member] Warrants With Exercise Price of $0.001 Basis differences in property and equipment Deferred Tax Liabilities, Property, Plant and Equipment State Income Tax Paid, State and Local, after Refund Received Financial Instruments [Domain] Financial Instruments [Domain] Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Issuance of common stock under Open Market Sale Agreement, net of issuance costs Gross proceeds Stock Issued During Period, Value, New Issues Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Maximum milestone payments permitted vtgn_RevenueRecognitionMilestoneMethodMaximumMilestonePaymentsPermitted Represents the maximum amount of consideration that can be received during the period for the milestone or milestones. State Income Tax Jurisdiction, Domestic State and Local [Member] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount T1 Warrants T1 Warrants [Member] T1 Warrants Number of remaining shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant ESPP maximum eligible earnings withheld contribution percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate Related Party Transaction [Table] Related Party Transaction [Table] Tax effect of other non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Common stock authorized but not reserved (in shares) Common Stock Shares Issuable Represents the authorized shares that are still issuable. Computer equipment Computer Equipment [Member] Operating loss carryforwards, subject to expiration Operating Loss Carryforwards Subject To Expiration Amount of operating loss carryforwards that are subject to expiration. Sale of Stock [Axis] Sale of Stock [Axis] Schedule of Lease Cost Lease, Cost [Table Text Block] Fuji Pharma Fuji Pharma [Member] Fuji Pharma Maximum aggregate offering price Stock Sales Agreement, Maximum Aggregate Offering Price The maximum aggregate offering price for common stock in the sales agreement. Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Schedule of Cash, Cash Equivalents and Marketable Securities at Fair Value Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Auditor Firm ID Auditor Firm ID Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Loss from operations Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Foreign Income Tax Paid, Foreign, after Refund Received Number of lease renewal options Lessee, Operating Lease, Number of Renewal Options Lessee, Operating Lease, Number of Renewal Options Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Related Party Transaction [Domain] Related Party Transaction [Domain] 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. Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Schedule of Common Stock Warrants Outstanding Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Description of Business Business Description and Basis of Presentation [Text Block] Purchases of laboratory and other equipment vtgn_PaymentsToAcquireLaboratoryAndOtherEquipment Represents cash outflow for laboratory and other equipment. 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Accrued research and development costs 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. 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Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent The 2019 Omnibus Equity Incentive Plan The 2019 Omnibus Equity Incentive Plan [Member] Represents information related to the 2019 Omnibus Equity Incentive Plan. Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Weighted-Average Remaining Contractual Term (Years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Equity Line Equity Line [Member] Represents equity line. Stock, Class of Stock [Table] Stock, Class of Stock [Table] All other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Current assets: Assets, Current [Abstract] Remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Prefunded Warrants Prefunded Warrants [Member] Prefunded Warrants Income taxes Income Tax Expense (Benefit) Income Tax Expense (Benefit) Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Deferred revenue Deferred Tax Assets, Deferred Income Other income, net Other Nonoperating Income Operating loss carryforwards, not subject to expiration Operating Loss Carryforwards Not Subject To Expiration Amount of operating loss carryforwards that are not subject to expiration dates. Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Total deferred tax assets net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Total deferred tax assets Deferred Tax Assets, Gross Net loss Net loss Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Issuance of note payable for insurance policy Proceeds from Notes Payable Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Leases Lessee, Leases [Policy Text Block] Schedule of Changes in Contract Assets and Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Contract liabilities: Change in Contract with Customer, Liability [Roll Forward] Change in Contract with Customer, Liability Tax effect of stock compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Revenues: Revenues [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, After Year Two Lessee, Operating Lease, Liability, to be Paid, After Year Two U.S. treasury notes US Treasury Notes Securities [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Exercise of warrants (in shares) Class of Warrant or Right, Exercises In Period Class of Warrant or Right, Exercises In Period Sublicense and Other Revenue [Member] Sublicense and Other Revenue