Entity Central Index Key Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity Shell Company Entity Shell Company Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Interactive Data Current Entity Interactive Data Current Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Prepaid expenses Prepaid Expense Current Deferred offering costs Deferred Offering Costs Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) Liabilities And Stockholders Equity [Abstract] Current liabilities Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses Accrued Liabilities Current Due to related party Due To Related Parties Current Total current liabilities Liabilities Current Total liabilities Liabilities Commitments and contingencies - Note 10 Commitments And Contingencies Stockholders' equity (deficit) Stockholders Equity [Abstract] Preferred stock, $0.00001 par value per share; 10,000,000 shares authorized and no shares issued and outstanding as of September 30, 2020; no shares authorized, issued and outstanding as of December 31, 2019 Preferred Stock Value Common stock, $0.00001 par value per share; 200,000,000 shares authorized and 37,761,435 issued and outstanding as of September 30, 2020; 10,895,000 shares authorized, 10,894,999 issued and outstanding as of December 31, 2019 Common Stock Value Additional paid-in capital Additional Paid In Capital Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity (deficit) Stockholders Equity Total liabilities and stockholders' equity (deficit) Liabilities And Stockholders Equity Preferred stock, par value per share Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value per share Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Change in fair value preferred stock tranche liability. Income Statement [Abstract] Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense General and administrative General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other expense: Nonoperating Income Expense [Abstract] Change in fair value of preferred stock tranche liability Change In Fair Value Of Preferred Stock Tranche Liability Interest expense Interest Expense Total other expense Nonoperating Income Expense Net loss Net Income Loss Net loss per common share, basic and diluted Earnings Per Share Basic And Diluted Weighted average common shares outstanding, basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted Temporary equity stock issued during period shares new issues. Reclassification of Temporary Equity preferred stock tranche liability upon issuance of milestone shares. Temporary equity conversion shares of convertible preferred stock to common stock. Temporary equity conversion value of convertible preferred stock to common stock. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Deficit Retained Earnings [Member] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Series A Convertible preferred stock. Series A Convertible Preferred Stock Series A Convertible Preferred Stock [Member] Series B convertible preferred stock. Series B Convertible Preferred Stock Series B Convertible Preferred Stock [Member] Statement [Line Items] Statement [Line Items] Balance Convertible preferred stock balance, shares Temporary Equity Shares Outstanding Convertible preferred stock balance Temporary Equity Carrying Amount Attributable To Parent Balance, shares Issuance of convertible preferred stock Temporary Equity Stock Issued During Period Value New Issues Issuance of convertible preferred stock, shares Temporary Equity Stock Issued During Period Shares New Issues Reclassification of preferred stock tranche liability upon issuance of Series A milestone shares Reclassification Of Temporary Equity Preferred Stock Tranche Liability Upon Issuance Of Milestone Shares Conversion of Series A and Series B convertible preferred stock to common stock Temporary Equity Conversion Value Of Convertible Preferred Stock To Common Stock Conversion of Series A and Series B convertible preferred stock to common stock, shares Temporary Equity Conversion Shares Of Convertible Preferred Stock To Common Stock Conversion of Series A and Series B convertible preferred stock to common stock Stock Issued During Period Value Conversion Of Convertible Securities Conversion of convertible to common stock, shares Stock Issued During Period Shares Conversion Of Convertible Securities Issuance of shares of common stock Stock Issued During Period Value New Issues Issuance of shares of common stock, shares Stock Issued During Period Shares New Issues Issuance of restricted stock award Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures Issuance of restricted stock award, shares Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Issuance of Founders Shares Stock Issued During Period Value Issued For Services Issuance of Founders Shares, shares Stock Issued During Period Shares Issued For Services Net loss Balance Convertible preferred stock balance, shares Convertible preferred stock balance Balance, shares Temporary equity stock offering costs. Temporary equity stock issuance of preferred stock tranche liability. Issuance of convertible preferred stock, offering costs Temporary Equity Stock Offering Costs Issuance of shares of common stock in initial public offering, net of offering costs and underwriting discounts and commissions Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Issuance of preferred stock tranche liability Temporary Equity Stock Issuance Of Preferred Stock Tranche Liability Reclassification of preferred stock liability upon issuance costs. Allocation of preferred stock tranche liability. Conversion of convertible preferred stock to common stock. Research and development license not yet paid. Statement Of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss Adjustments to reconcile net loss to net cash used in operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation expense Depreciation Change in fair value of preferred stock tranche liability Research and development license expense Research And Development In Process Stock-based compensation Share Based Compensation Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Prepaid expenses Increase Decrease In Prepaid Expense Accounts payable Increase Decrease In Accounts Payable Accrued expenses Increase Decrease In Accrued Liabilities Due to related party Increase Decrease In Due To Related Parties Net cash used in operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities Net Cash Provided By Used In Investing Activities [Abstract] Purchase of research and development license Payments To Acquire In Process Research And Development Purchase of property and equipment Payments To Acquire Property Plant And Equipment Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commission and other offering costs Proceeds From Issuance Initial Public Offering Proceeds from issuances of convertible preferred stock, net of issuance costs Proceeds From Issuance Of Convertible Preferred Stock Proceeds from notes payable to related party Proceeds From Related Party Debt Repayment of notes payable to related party Repayments Of Related Party Debt Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Net increase in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash at the beginning of the period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash at the end of the period Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Net Supplemental disclosure of noncash investing and financing activities: Noncash Investing And Financing Items [Abstract] Reclassification of preferred stock tranche liability upon share issuance Reclassification Of Preferred Stock Liability Upon Issuance Costs Allocation of preferred stock tranche liability Allocation Of Preferred Stock Tranche Liability Conversion of Series A and Series B convertible preferred stock to common stock Conversion Of Convertible Preferred Stock To Common Stock Purchase of research and development license not yet paid Research And Development License Not Yet Paid Issuance costs for issuances of stock not yet paid Stock Issued1 Organization Consolidation And Presentation Of Financial Statements [Abstract] Organization and Description of Business Operations Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Balance Sheet Related Disclosures [Abstract] Supplemental Financial Information Supplemental Balance Sheet Disclosures [Text Block] Research, collaboration and license agreements. Research Collaboration And License Agreements [Abstract] Research, Collaboration and License Agreements Collaborative Arrangement Disclosure [Text Block] Equity [Abstract] Stockholders' Equity (Deficit), Convertible Preferred Stock and Tranche Liability Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Earnings Per Share [Abstract] Net Loss Per Common Share Earnings Per Share [Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Use of Estimates Use Of Estimates Cash and Cash Equivalents Cash And Cash Equivalents Policy [Text Block] Concentrations of Credit Risk Concentration Risk Credit Risk Fair Value of Financial Instruments Fair Value Of Financial Instruments Policy Deferred Offering Costs Deferred Charges Policy [Text Block] Property and Equipment Property Plant And Equipment Policy [Text Block] Impairment of Long-Lived Assets Impairment Or Disposal Of Long Lived Assets Policy [Text Block] Preferred stock tranche liability. Preferred Stock Tranche Liability Preferred Stock Tranche Liability Policy [Text Block] Stock-Based Compensation Compensation Related Costs Policy [Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Accrued Expenses Schedule Of Accrued Liabilities Table [Text Block] Reconciliation of preferred stock tranche liability measured at fair value. Reconciliation of Preferred Stock Tranche Liability Measured at Fair Value Reconciliation Of Preferred Stock Tranche Liability Measured At Fair Value Table [Text Block] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Cancelled options. Cancelled Options Cancelled Options [Member] Stock Options Employee Stock Option [Member] Schedule of Assumptions Used to Estimate Fair Value of Stock Options and Cancelled Options Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Schedule of Stock Option Activity, Excluding Cancelled Options Schedule Of Share Based Compensation Activity Table [Text Block] Schedule of Restricted Stock Units Activity Schedule Of Nonvested Restricted Stock Units Activity Table [Text Block] Schedule of Restricted Stock Awards Activity Nonvested Restricted Stock Shares Activity Table [Text Block] Schedule of Total Stock-Based Compensation Expense for Stock Options, RSAs and RSUs (Detail) Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of Common Stock Equivalents Outstanding Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Organization and description of business operations. Organization and description of business operations. Organization And Description Of Business Operations [Table] Organization And Description Of Business Operations [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand twenty equity incentive plan. 2020 Equity Incentive Plan Two Thousand Twenty Equity Incentive Plan [Member] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] IPO I P O [Member] Underwriters’ Option to Purchase Additional Shares Over Allotment Option [Member] IPO Organization and Description of Business Operations [Line Items] Organization And Description Of Business Operations [Line Items] Date of incorporation Entity Incorporation Date Of Incorporation Conversion ratio Stockholders Equity Note Stock Split Conversion Ratio1 Number of common stock authorized for issuance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Share issue price per share Shares Issued Price Per Share Net proceeds from issuance of common stock Proceeds From Issuance Of Common Stock Underwriting discounts and commissions and other offering costs Payments For Underwriting Expense Conversion of convertible preferred stock to common stock, shares Conversion of stock, shares issued Common stock increase in outstanding shares. Increase in outstanding shares Common Stock Increase In Outstanding Shares Accumulated deficit Aggregate shares sold Sale Of Stock Number Of Shares Issued In Transaction Gross proceeds from sale of convertible preferred stock Significant accounting policies line items. Significant accounting policies table. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Cash equivalents Cash Equivalents At Carrying Value Property and equipment, useful life Property Plant And Equipment Useful Life Impairment losses Impairment Of Long Lived Assets Held For Use Accrued research and development current. Accrued issuance costs current. Accrued research and development Accrued Research And Development Current Accrued issuance costs Accrued Issuance Costs Current Accrued compensation Employee Related Liabilities Current Accrued professional fees Accrued Professional Fees Current Other Other Accrued Liabilities Current Total accrued expenses Preclinical activities period under sponsored research agreements. Minimum licensed product to develop obtain regulatory approval for and commercialize. Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Counterparty Name Counterparty Name [Axis] Counterparty Name Repurchase Agreement Counterparty Name [Domain] UT southwestern agreement. UT Southwestern Agreement U T Southwestern Agreement [Member] Queen's agreement. Queen's Agreement Queens Agreement [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Maximum Maximum [Member] Minimum [Member] Minimum [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Research and Development Expense Research And Development Expense [Member] Abeona CLN1 agreements. Abeona CLN1 Agreements Abeona C L N1 Agreements [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Preclinical activities period under sponsored research agreements Preclinical Activities Period Under Sponsored Research Agreements Minimum licensed product to develop obtain regulatory approval for and commercialize Minimum Licensed Product To Develop Obtain Regulatory Approval For And Commercialize Percentage of fully diluted common stock shares outstanding. Percentage of common stock shares entitled to receive additional shares on fully diluted basis. Percentage of fully diluted common stock shares outstanding Percentage Of Fully Diluted Common Stock Shares Outstanding Percentage of entitled to receive additional shares on fully diluted basis Percentage Of Common Stock Shares Entitled To Receive Additional Shares On Fully Diluted Basis Research grant of committed fund amount. Research grant outstanding fund amount. Research grant of committed fund amount Research Grant Of Committed Fund Amount Percentage of interest rate Debt Instrument Interest Rate Stated Percentage Research grant outstanding fund amount Research Grant Outstanding Fund Amount Payments to acquire license right. License agreement regulatory milestones payment. License agreement commercial milestones payment. Cash payment to acquire license agreement Payments To Acquire License Right License agreement regulatory milestones payment License Agreement Regulatory Milestones Payment License agreement commercial milestones payment License Agreement Commercial Milestones Payment Payment of license fee. Purchase of clinical materials and reimbursement incurred development costs. License and inventory purchase agreement regulatory related milestones payment. License and inventory purchase agreement sales related milestones payment. License fee payment Payment Of License Fee Purchase of clinical materials and reimbursement incurred development costs Purchase Of Clinical Materials And Reimbursement Incurred Development Costs License and inventory purchase agreement regulatory related milestones payment License And Inventory Purchase Agreement Regulatory Related Milestones Payment License and inventory purchase agreement sales related milestones payment License And Inventory Purchase Agreement Sales Related Milestones Payment Proceeds from issuance of common stock, gross. Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Collaborative Arrangement and Arrangement Other than Collaborative Type Of Arrangement [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Arrangements And Nonarrangement Transactions [Member] Series A purchase agreement. Series A Purchase Agreement Series A Purchase Agreement [Member] Series A purchase agreement initial closing. Initial Closing Series A Purchase Agreement Initial Closing [Member] Series A achievement of specific clinical milestone one. Achievement of Specific Clinical Milestone One Series A Achievement Of Specific Clinical Milestone One [Member] Series A achievement of specific clinical milestone two. Achievement of Specific Clinical Milestone Two Series A Achievement Of Specific Clinical Milestone Two [Member] Series A upon achievement of certain defined clinical milestones. Upon Achievement of Certain Defined Clinical Milestones Series A Upon Achievement Of Certain Defined Clinical Milestones [Member] Private Placement Private Placement [Member] PBM TGT holdings, limited liability company. PBM TGT Holdings, LLC P B M T G T Holdings Limited Liability Company [Member] Nolan capital, limited liability company. Nolan Capital, LLC Nolan Capital Limited Liability Company [Member] Series B purchase agreement. Series B Purchase Agreement Series B Purchase Agreement [Member] Measurement Input Type Measurement Input Type [Axis] Measurement Input Type Measurement Input Type [Domain] Risk Free Rate Measurement Input Risk Free Interest Rate [Member] Expected Volatility Measurement Input Price Volatility [Member] Measurement input probability of achieving clinical milestones and timing. Probability of Achieving Clinical Milestones and Timing Measurement Input Probability Of Achieving Clinical Milestones And Timing [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Shares issued during period Gross proceeds from issuance of common stock Proceeds From Issuance Of Common Stock Gross Stock issuance costs, including underwriters’ discounts and commissions Payments Of Stock Issuance Costs Increase in outstanding shares Common stock, shares authorized Convertible preferred stock, shares authorized Temporary Equity Shares Authorized Convertible preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Number of share options exercised Stock Issued During Period Shares Stock Options Exercised Clinical milestones for gross proceeds Proceeds From Collaborators Convertible preferred stock tranche liability offering price. Convertible preferred stock tranche liability measurement input. Convertible preferred stock tranche liability liquidity term. Convertible preferred stock tranche liability, offering price Convertible Preferred Stock Tranche Liability Offering Price Convertible preferred stock tranche liability, measurement input Convertible Preferred Stock Tranche Liability Measurement Input Convertible preferred stock tranche liability, term Convertible Preferred Stock Tranche Liability Liquidity Term Preferred Stock Tranche Liability. Preferred stock tranche liability Preferred Stock Tranche Liability Issuance of pro-rata portion of milestone shares. Mile stone shares issued. Amount reclassified to convertible preferred stock. Mile stone pro-rate shares issued during the period Issuance Of Pro Rata Portion Of Milestone Shares Non cash expenses due to remeasured fair value of tranche liability Mile stone shares issued during the period Mile Stone Shares Issued Amount reclassified to convertible preferred stock Amount Reclassified To Convertible Preferred Stock Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] Liability Class Fair Value By Liability Class [Axis] Fair Value by Liability Class Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Preferred stock tranche liability. Preferred Stock Tranche Liability Preferred Stock Tranche Liability [Member] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Balance at January 1, 2020 Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value Fair value at issuance of Series A convertible preferred stock Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues Change in fair value Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings Settlement of preferred stock tranche liability due to issuance of Milestone Shares Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements Balance at September 30, 2020 Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Existing Plan Two thousand twenty stock incentive plan. New Plan Two Thousand Twenty Stock Incentive Plan [Member] Restricted Stock Units Restricted Stock Units R S U [Member] Title of Individual Title Of Individual [Axis] Title of Individual Title Of Individual With Relationship To Entity [Domain] Certain employees and consultants. Certain Employees and Consultants Certain Employees And Consultants [Member] Directors Director [Member] Vesting Vesting [Axis] Vesting Vesting [Domain] Share-based Payment Arrangement, Tranche One Share Based Compensation Award Tranche One [Member] Share-based Payment Arrangement, Tranche Two Share Based Compensation Award Tranche Two [Member] Share-based Payment Arrangement, Tranche Three Share Based Compensation Award Tranche Three [Member] Share based compensation award tranche four. Share-based Payment Arrangement, Tranche Four Share Based Compensation Award Tranche Four [Member] President and chief executive officer. RA Session II President And Chief Executive Officer [Member] Restricted Stock Awards Restricted Stock [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Number of shares authorized for issuance Share based compensation arrangement by share based payment award commencement date. Percentage of automatic increase every year in common stock shares reserved for future issuance. Common stock reserved for future issuance Common Stock Capital Shares Reserved For Future Issuance Share-based payment award, expiration period Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period Share-based payment award, commencement date Share Based Compensation Arrangement By Share Based Payment Award Commencement Date Share-based payment award, expiration date Share Based Compensation Arrangement By Share Based Payment Award Expiration Date Percentage of automatic increase every year in common stock shares reserved for future issuance Percentage Of Automatic Increase Every Year In Common Stock Shares Reserved For Future Issuance Share-based payment award, terms of award issuance Share Based Compensation Arrangement By Share Based Payment Award Terms Of Award Share based compensation arrangement by share based payment award options grants in period grant date fair value. Share based compensation arrangement by share based payment award equity instruments other than options replacement units grants in period. Share-based payment award, options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Share-based payment award, options granted, exercise price per share Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Award vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Share-based payment award, options grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Fair Value Number of shares awarded Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Replacement Units Grants In Period Share-based payment award, plan modification, incremental cost Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost Share-based payment award, compensation cost not yet recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Common stock fair value per share. Fair value of common stock per share Common Stock Fair Value Per Share Preferred stock, issuing price per share Share Price Risk-free interest rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Expected dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Expected term in years Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Outstanding. Stock Options, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Options granted, Stock Options Outstanding. Stock Options, Ending Balance Vested and expected to vest at September 30, 2020, Stock Options Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Options exercisable at September 30, 2020, Stock Options Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number Outstanding, Weighted Average Exercise Price, Beginning balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Options granted, Weighted Average Exercise Price Outstanding, Weighted Average Exercise Price, Ending balance Vested and expected to vest at September 30, 2020, Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price Options exercisable at September 30, 2020, Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Share based compensation arrangement By share based payment award options granted weighted average remaining contractual term1. Outstanding, Weighted Average Remaining Contractual Life Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Options Granted, Weighted Average Remaining Contractual Life, Share Based Compensation Arrangement By Share Based Payment Award Options Granted Weighted Average Remaining Contractual Term1 Vested and expected to vest at September 30, 2020, Weighted Average Remaining Contractual Life Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 Weighted Average Remaining Contractual Life, Options exercisable at September 30, 2020 Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Share based compensation arrangement by share based payment award options grants in period intrinsic value. Outstanding, Aggregate Intrinsic Value, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Options granted, Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Intrinsic Value Outstanding, Aggregate Intrinsic Value, Ending Balance Vested and expected to vest at September 30, 2020, Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value Share-based payment award, options, weighted-average grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Share-based payment award, options, compensation cost not yet recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Share-based payment award, compensation cost not yet recognized, weighted-average period of recognition Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Share-based payment award, RSU/RSA granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Share-based payment award, vesting rights percentage Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage Share-based payment award, unvested RSU/RSA granted, compensation cost not yet recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Nonvested, Number of Shares, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Replacement restricted units granted, Number of Shares Restricted units/stock granted, Number of Shares Vested, Number of Shares Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Nonvested, Number of Shares, Ending Balance Share based compensation arrangement by share based payment award equity instruments other than options replacement units grants in period weighted average grant date fair value. Nonvested, Weighted Average Grant Date Fair Value per Share, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Replacement restricted units granted, Weighted Average Grant Date Fair Value per Share Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Replacement Units Grants In Period Weighted Average Grant Date Fair Value Restricted units/stock granted, Weighted Average Grant Date Fair Value per Share Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Vested, Weighted Average Grant Date Fair Value per Share Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Nonvested, Weighted Average Grant Date Fair Value per Share, Ending Balance Award requisite service vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 Share-based payment award, RSU/RSA granted, weighted average grant date fair value Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] General and Administrative Expense General And Administrative Expense [Member] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Stock-based compensation expense Allocated Share Based Compensation Expense Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Unvested RSUs Unvested RSAs Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Anti-dilutive securities excluded from computation of diluted net loss per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Number of secured promissory notes. Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Secured promissory notes. Secured Promissory Notes Secured Promissory Notes [Member] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] PBM Capital Group, LLC. PBM Capital Group, LLC P B M Capital Group L L C [Member] Related Party Transaction Related Party Transaction [Axis] Related Party Transaction Related Party Transaction [Domain] Services agreement. Services Agreement Services Agreement [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Number of secured promissory notes Number Of Secured Promissory Notes Aggregate amount, related party transaction Debt Instrument Face Amount Beneficial owner percentage in excess of common stock. Beneficial owner of greater than company’s common stock, percentage Beneficial Owner Percentage In Excess Of Common Stock Accounting and other administrative and management services fee per month Related Party Transaction Expenses From Transactions With Related Party Payment of one-time upfront license fee. Regulatory related milestones obligation payable. Sale-related milestones per licensed product and royalties on net sales of licensed products payable. Subsequent Event [Table] Subsequent Event [Table] Abeona Rett agreement. Abeona Rett Agreement Abeona Rett Agreement [Member] Abeona Therapeutics Inc. Abeona Abeona Therapeutics Inc [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Payment of one-time upfront license fee Payment Of One Time Upfront License Fee Regulatory related milestones obligation payable Regulatory Related Milestones Obligation Payable Sale-related milestones per licensed product and royalties on net sales of licensed products payable Sale Related Milestones Per Licensed Product And Royalties On Net Sales Of Licensed Products Payable