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, Address Line Two Entity Address Address Line2 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 and other current assets Prepaid Expense And Other Assets Current Deferred offering costs Deferred Offering Costs Total current assets Assets Current Deferred lease asset Deferred Costs Leasing Net Noncurrent Property, plant and equipment, net Property Plant And Equipment Net Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities And Stockholders Equity [Abstract] Current liabilities Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other current liabilities Accrued Liabilities And Other Liabilities Total current liabilities Liabilities Current Other non-current liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies - Note 10 Commitments And Contingencies Stockholders' equity Stockholders Equity [Abstract] Preferred stock, $0.00001 par value per share; 10,000,000 shares authorized and no shares issued and outstanding as of March 31, 2021 and December 31, 2020 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 March 31, 2021 and December 31, 2020 Common Stock Value Additional paid-in capital Additional Paid In Capital Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders' equity 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 income (expense): Nonoperating Income Expense [Abstract] Change in fair value of preferred stock tranche liability Change In Fair Value Of Preferred Stock Tranche Liability Interest income Interest Income Expense Nonoperating Net Interest expense Interest Expense Total other income, net 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 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] Statement [Line Items] Statement [Line Items] Balance Balance, shares Issuance of convertible preferred stock Temporary Equity Stock Issued During Period Value New Issues Temporary equity stock issued during period shares new issues. Issuance of convertible preferred stock, shares Temporary Equity Stock Issued During Period Shares New Issues Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Net loss Balance Balance, shares Convertible preferred stock balance, shares Temporary Equity Shares Outstanding Convertible preferred stock balance Temporary Equity Carrying Amount Attributable To Parent Convertible preferred stock balance, shares Convertible preferred stock balance 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 preferred stock tranche liability Temporary Equity Stock Issuance Of Preferred Stock Tranche Liability Increase decrease in accrued expense and other liabilities. Research and development license not yet paid. Property and equipment in accounts payable and accrued expenses. Allocation of preferred stock tranche liability. 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 and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other liabilities Increase Decrease In Accrued Expense And Other 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 property, plant 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 issuances of Series A convertible preferred stock Proceeds From Issuance Of Convertible Preferred Stock Proceeds from note payable to related party Proceeds From Related Party Debt Repayment of note payable to related party Repayments Of Related Party Debt Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Net (decrease) 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 noncash investing and financing activities: Noncash Investing And Financing Items [Abstract] Purchase of research and development license not yet paid Research And Development License Not Yet Paid Property, plant and equipment in accounts payable and accrued expenses Property And Equipment In Accounts Payable And Accrued Expenses Acquisition of property, plant and equipment funded by landlord Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 Deferred offering costs not yet paid Capital Expenditures Incurred But Not Yet Paid Allocation of preferred stock tranche liability Allocation Of Preferred Stock Tranche Liability Series A issuance costs 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] Balance Sheet Components 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] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Use of Estimates Use Of Estimates Recently Issued Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Prepaid Expenses and Other Current Assets Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block] Schedule of Property Plant and Equipment Property Plant And Equipment [Text Block] Schedule of accrued expense and other current labilities. Schedule Of Accrued Expense And Other Current Labilities Schedule Of Accrued Expense And Other Current Labilities 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] 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 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 Calculation of Basic and Diluted Net Loss Per Common Share Schedule Of Earnings Per Share Basic And Diluted Table [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] Series B convertible preferred stock. Series B Convertible Preferred Stock Series B Convertible Preferred Stock [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 Issuance of shares of common stock, shares Stock Issued During Period Shares New Issues 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 Temporary equity conversion shares of convertible preferred stock to common stock. Conversion of convertible preferred stock to common stock, shares Temporary Equity Conversion Shares Of Convertible Preferred Stock To Common Stock Conversion of stock, shares issued Stock Issued During Period Shares Conversion Of Convertible Securities 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 Cash Cash Prepaid research and development contracts. Prepaid bonus. Prepaid clinical trial. Prepaid research and development Prepaid Research And Development Contracts Prepaid insurance Prepaid Insurance Prepaid bonus Prepaid Bonus Prepaid clinical trial Prepaid Clinical Trial Other Other Assets Current Total prepaid expenses and other current assets Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Computer Equipment Computer Equipment [Member] Laboratory equipment. Laboratory Equipment Laboratory Equipment [Member] Construction in Progress Construction In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property, plant and equipment, gross Property Plant And Equipment Gross Accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property, plant and equipment, net Accrued research and development current. Accrued license fees current. Accrued construction in progress current. Accrued research and development Accrued Research And Development Current Accrued license fees Accrued License Fees Current Accrued compensation Employee Related Liabilities Current Accrued professional and consulting fees Accrued Professional Fees Current Accrued construction in progress Accrued Construction In Progress Current Other Other Accrued Liabilities Current Total accrued expenses and other current liabilities 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] Collaborative Arrangement and Arrangement Other than Collaborative Type Of Arrangement [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Arrangements And Nonarrangement Transactions [Member] Abeona Rett agreement. Abeona Rett Agreement Abeona Rett Agreement [Member] Abeona Therapeutics Inc. Abeona Abeona Therapeutics Inc [Member] Acquisition of worldwide rights for TSHA 120 for treatment of giant axonal neuropathy. TSHA-120 Acquisition Of Worldwide Rights For T S H A120 For Treatment Of Giant Axonal Neuropathy [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 License agreement regulatory milestones payment. License agreement commercial milestones payment. Payments to acquire license right. 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. Additional Milestone payments. 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 Additional milestone payments Additional Milestone Payments Regulatory related milestones obligation payable. Sale-related milestones per licensed product and royalties on net sales of licensed products payable. Payment of one-time upfront license fee. 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 Upfront payment. Clinical, regulatory and commercial milestones to be received. Upfront payment Upfront Payment Clinical, regulatory and commercial milestones to be received Clinical Regulatory And Commercial Milestones To Be Received Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Underwriters’ Option to Purchase Additional Shares 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] 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 Proceeds from issuance of common stock, gross. 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 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 Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] 2020 Equity Incentive Plan Two thousand twenty stock incentive plan. New Plan Two Thousand Twenty Stock Incentive Plan [Member] Employee stock purchase plan. Employee Stock Purchase Plan (“ESPP”) Employee Stock Purchase Plan [Member] Cancelled options. Cancelled Options Cancelled Options [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] 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 payment award, options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Number of shares of common stock issued under ESPP Stock Issued During Period Shares Employee Stock Purchase Plans 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, 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, 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 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 Options cancelled or forfeited, Stock Options Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Outstanding. Stock Options, Ending Balance Vested and expected to vest at March 31, 2021, Stock Options Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Options exercisable at March 31, 2021, 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 Options cancelled or forfeited, Weighted Average Exercise Price Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Outstanding, Weighted Average Exercise Price, Ending balance Vested and expected to vest at March 31, 2021, 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 March 31, 2021, 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 Vested and expected to vest at March 31, 2021, 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 March 31, 2021 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. Share based compensation arrangement by share based payment award options cancelled or forfeited 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 Options cancelled or forfeited, Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled Or Forfeited In Period Intrinsic Value Outstanding, Aggregate Intrinsic Value, Ending Balance Vested and expected to vest at March 31, 2021, Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value Options exercisable at March 31, 2021, Aggregate Intrinsic Value Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 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 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 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 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 Net loss Net Income Loss Available To Common Stockholders Basic 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 Stock Options 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] PBM TGT Holdings, LLC. PBM TGT Holdings, LLC P B M T G T Holdings 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] Paul B. Manning Director [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 Repayments of debt Repayments Of Debt Ownership percentage in excess of capital stock. Additional consideration to related party under operating agreement. Accounting and other administrative and management services fee per month Related Party Transaction Expenses From Transactions With Related Party Ownership percentage more than capital stock Ownership Percentage In Excess Of Capital Stock Additional consideration payable under operating agreement Additional Consideration To Related Party Under Operating Agreement Provision for income taxes Income Tax Expense Benefit Loss Contingencies [Table] Loss Contingencies [Table] Durham lease. Durham Lease Durham Lease [Member] Dallas lease. Dallas Lease Dallas Lease [Member] Pegasus Park, LLC. Pegasus Park L L C Pegasus Park L L C [Member] Lease Contractual Term Lease Contractual Term [Axis] Lease Contractual Term Lease Contractual Term [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of operating lease landlord square feet manufacturing facility Property Subject To Or Available For Operating Lease Number Of Units Operating lease commencement date Operations Commenced Date1 Operating lease term of contract Lessee Operating Lease Term Of Contract Operating lease extend term of contract Lessee Operating Lease Renewal Term Operating leases initial direct costs. Operating leases initial direct costs Operating Leases Initial Direct Costs Obligation for payment of initial base rent for office space. Maximum estimated monthly base rent increase annually during term of lease. Maximum construction allowance provided by landlord per rentable square foot. Lease, option to extend description Lessee Operating Lease Option To Extend Lease, option to extend Lessee Operating Lease Existence Of Option To Extend Obligation for payment of initial base rent for office space Obligation For Payment Of Initial Base Rent For Office Space Maximum estimated monthly base rent increase annually during term of lease Maximum Estimated Monthly Base Rent Increase Annually During Term Of Lease Security deposit Security Deposit Maximum construction allowance provided by landlord per rentable square foot Maximum Construction Allowance Provided By Landlord Per Rentable Square Foot Future minimum lease payments Lessee Operating Lease Liability Payments Due Lease construction incentive Lease Incentive Receivable