Entity Central Index Key Cover [Abstract] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Document Period End Date Document Period End Date Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation State Country Code 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 Title of 12(b) Security Security12b Title Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current 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 Bankruptcy Proceedings, Reporting Current Entity Bankruptcy Proceedings Reporting Current Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Amendment Flag Amendment Flag Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Short-term marketable securities Available For Sale Securities Debt Securities Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Other assets Other Assets Noncurrent Total assets Assets Liabilities, Convertible Preferred Stock, and Stockholders’ Equity (Deficit) Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses Accrued Liabilities Current Total current liabilities Liabilities Current Other liabilities Other Liabilities Noncurrent Total liabilities Liabilities Convertible preferred stock, accumulated liquidation value of $0 and $169,385 at September 30, 2020 (unaudited) and December 31, 2019, respectively Temporary Equity Carrying Amount Attributable To Parent Stockholders’ equity (deficit): Stockholders Equity [Abstract] Preferred stock, $0.00001 par value, 5,000,000 and no shares authorized at September 30, 2020 (unaudited) and December 31, 2019, respectively, no shares issued or outstanding at September 30, 2020 (unaudited) and December 31, 2019, respectively. Preferred Stock Value Common stock, $0.00001 par value, 1,000,000,000 and 33,250,829 shares authorized; 44,773,748 and 3,046,200 shares issued and outstanding at September 30, 2020 (unaudited) and December 31, 2019, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated deficit Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Total stockholders’ equity (deficit) Stockholders Equity Total liabilities, convertible preferred stock, and stockholders’ equity (deficit) Liabilities And Stockholders Equity Convertible preferred stock, accumulated liquidation value Temporary Equity Liquidation Preference Preferred stock, par value 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 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 Other nonoperating income (expense), other. 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) income: Other Nonoperating Income Expense [Abstract] Interest income, net Interest Income Expense Net Other expense Other Nonoperating Income Expense Other Total other (expense) income Other Nonoperating Income Expense Loss before provision for income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision for income taxes Income Tax Expense Benefit Net loss Net Income Loss Unrealized (loss) gains on marketable securities, net of tax Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax Comprehensive loss Comprehensive Income Net Of Tax Net loss per share -- basic and diluted Earnings Per Share Basic And Diluted Weighted-average common shares outstanding Weighted Average Number Of Share Outstanding Basic And Diluted Stock issued during period value exercise of warrants. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Convertible Preferred Stock Convertible Preferred Stock [Member] 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 Other Comprehensive Loss Accumulated Other Comprehensive Income [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Balance Balance, Shares Temporary Equity Shares Outstanding Balance Balance, Shares Shares Outstanding Issuance of Series D convertible preferred stock, net of issuance costs of $208 Temporary Equity Stock Issued During Period Value New Issues Temporary equity, stock issued during period, shares, new issues. Issuance of Series D convertible preferred stock, net of issuance costs of $208, Shares Temporary Equity Stock Issued During Period Shares New Issues Conversion of convertible preferred stock to common stock Reclassifications Of Temporary To Permanent Equity Reclassifications of temporary to permanent equity, shares. Conversion of convertible preferred stock to common stock, Shares Reclassifications Of Temporary To Permanent Equity Shares Conversion of convertible preferred stock to common stock Stock Issued During Period Value Conversion Of Convertible Securities Conversion of convertible preferred stock to common stock, Shares Stock Issued During Period Shares Conversion Of Convertible Securities Exercise of stock options Stock Issued During Period Value Stock Options Exercised Exercise of stock options, Shares Stock Issued During Period Shares Stock Options Exercised Exercise of warrants Stock Issued During Period Value Exercise Of Warrants Stock issued during period, shares, exercise of warrants. Exercise of warrants, Shares Stock Issued During Period Shares Exercise Of Warrants Issuance of common stock, net of issuance costs of $20,374 Stock Issued During Period Value New Issues Issuance of common stock, net of issuance costs of $20,374, Shares Stock Issued During Period Shares New Issues Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Net loss Unrealized gain (loss) on available for sale investments Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Balance Balance, Shares Balance Balance, Shares Series D Convertible Preferred Stock Series D Preferred Stock [Member] Issuance costs Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Conversion of convertible preferred stock to common stock. Conversion of warrant liability to common stock. Unpaid offering costs. 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 Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Stock based compensation Share Based Compensation Depreciation Depreciation Amortization of premiums on marketable securities Accretion Amortization Of Discounts And Premiums Investments Other Other Noncash Income Expense Change 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 Increase Decrease In Accrued Liabilities 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 and equipment Payments To Acquire Property Plant And Equipment Purchase of marketable securities Payments To Acquire Marketable Securities Maturities of marketable securities Proceeds From Sale And Maturity Of Marketable Securities Net cash provided by 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 convertible preferred stock, net Proceeds From Issuance Of Convertible Preferred Stock Proceeds from the issuance of common stock, net Proceeds From Issuance Of Common Stock Proceeds from exercise of stock options Proceeds From Stock Options Exercised 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 and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations [Abstract] Cash and cash equivalents - beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash and cash equivalents - end of period Supplemental disclosures of noncash financing activities Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Conversion of convertible preferred stock to common stock Conversion Of Convertible Preferred Stock To Common Stock Conversion of warrant liability to common stock Conversion Of Warrant Liability To Common Stock Unpaid offering costs Unpaid Offering Costs Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for income tax Income Taxes Paid Net Organization Consolidation And Presentation Of Financial Statements [Abstract] Formation and Business of the Company Business Description And Basis Of Presentation [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Fair Value Disclosures [Abstract] Financial Instruments and Fair Value Measurements Fair Value Disclosures [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Payables And Accruals [Abstract] Accrued Expenses Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Equity [Abstract] Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock Plan Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] Related Party Transactions [Abstract] Related Parties Related Party Transactions Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Use of Estimates Use Of Estimates Reverse stock split. Reverse Stock Split Reverse Stock Split Policy [Text Block] Cash, cash equivalents and marketable securities. Cash, Cash Equivalents and Marketable Securities Cash Cash Equivalents And Marketable Securities Policy [Text Block] Comprehensive Loss Comprehensive Income Policy Policy [Text Block] Recently Issued and Adopted Accounting Pronouncements and Not Yet Adopted Accounting Standards New Accounting Pronouncements Policy Policy [Text Block] Concentration of credit risk and other risks and uncertainties. Concentration of Credit Risk and Other Risks and Uncertainties Concentration Of Credit Risk And Other Risks And Uncertainties Policy [Text Block] Summary of Cash Equivalents and Available-for-sale Securities Carrying Amounts and Fair Values Fair Value Assets Measured On Recurring And Nonrecurring Basis Table [Text Block] Summary of Property and Equipment, Net Property Plant And Equipment [Text Block] Summary of Accrued Expenses Schedule Of Accrued Liabilities Table [Text Block] Schedule of Minimum Lease Payments under Leases Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Schedule of Stock Options Activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Schedule of Estimated Fair Value of Options Using Black-Scholes Options Valuation Model Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Stock-based Compensation Expense Related to Stock Options Granted Recorded and Allocated Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block] Schedule of Potentially Dilutive Common Stock Equivalent Excluded from Calculation of Diluted Net Loss per Share Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule of Computation of Net Loss per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Organization, consolidation and presentation. Organization, consolidation and presentation. Organization Consolidation And Presentation [Table] Organization Consolidation And Presentation [Table] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] IPO I P O [Member] Underwriters Over Allotment Option [Member] Organization Consolidation And Presentation [Line Items] Organization Consolidation And Presentation [Line Items] Number of shares sold Public offering price per share Sale Of Stock Price Per Share Option to purchase common stock Sale Of Stock Number Of Shares Issued In Transaction Gross proceeds from stock issuance Proceeds from stock issuance, net Proceeds From Issuance Initial Public Offering Reverse stock split description Stockholders Equity Reverse Stock Split Reverse stock split conversion ratio Stockholders Equity Note Stock Split Conversion Ratio1 Cash used in operating activities Amortization of available-for-sale debt securities Debt Securities Available For Sale Unrealized Gain Loss Adoption of accounting standards update [true false] Change In Accounting Principle Accounting Standards Update Adopted Accounting standards update, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Accounting standards update adoption, immaterial effect [true false] Change In Accounting Principle Accounting Standards Update Immaterial Effect Accounting Standards Update [Extensible List] Accounting Standards Update Extensible List Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Money Market Funds Money Market Funds [Member] Corporate Debt Securities Corporate Debt Securities [Member] Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Default] Portion At Fair Value Fair Value Disclosure [Member] Fair Value Measurement Fair Value Disclosure Item Amounts [Domain] Carrying Amount Carrying Reported Amount Fair Value Disclosure [Member] Fair Value Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Quoted Priced in Active Markets (Level 1) Fair Value Inputs Level1 [Member] Significant Other Observable Inputs (Level 2) Fair Value Inputs Level2 [Member] Significant Unobservable Inputs (Level 3) Fair Value Inputs Level3 [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Assets Assets Fair Value Disclosure [Abstract] Total assets Assets Fair Value Disclosure Cash and Cash Equivalents Cash And Cash Equivalents [Axis] Cash and Cash Equivalents Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Level 1 Level 2 Cash equivalents Cash Equivalents At Carrying Value Marketable securities Marketable Securities Current 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] Machinery & Equipment Machinery And Equipment [Member] Computers Computer Equipment [Member] Furniture & Fixtures Furniture And Fixtures [Member] Leasehold Improvements Leaseholds And Leasehold Improvements [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Total property and equipment Property Plant And Equipment Gross Less: Accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Accrued research and development costs current. Accrued compensation Workers Compensation Liability Current Accrued legal and professional services Accrued Professional Fees Current Accrued research and development costs Accrued Research And Development Costs Current Other accrued liabilities Other Accrued Liabilities Current Total 2020 (excluding the nine months ended September 30, 2020) Operating Leases Future Minimum Payments Remainder Of Fiscal Year 2021 Operating Leases Future Minimum Payments Due Current 2022 Operating Leases Future Minimum Payments Due In Two Years 2023 Operating Leases Future Minimum Payments Due In Three Years Thereafter Operating Leases Future Minimum Payments Due Thereafter Total future minimum lease payments Operating Leases Future Minimum Payments Due Rent expense Operating Leases Rent Expense Net Purchase commitments Purchase Commitment Remaining Minimum Amount Committed Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Series D convertible preferred stock. Series D Convertible Preferred Stock Series D Convertible Preferred Stock [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Shares issued price per share Shares Issued Price Per Share Dividends, common stock declared Dividends Common Stock Share-based compensation arrangement by share-based payment award, annual increase of authorized shares, percent of common stock outstanding. Share-based compensation arrangement by share-based payment award, shares outstanding, number. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand twenty equity incentive plan. 2020 Plan Two Thousand Twenty Equity Incentive Plan [Member] Two thousand twenty employee stock purchase plan. 2020 ESPP Two Thousand Twenty Employee Stock Purchase Plan [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 reserved for issuance Common Stock Capital Shares Reserved For Future Issuance Percentage of number of shares of common stock outstanding increase Share Based Compensation Arrangement By Share Based Payment Award Annual Increase Of Authorized Shares Percent Of Common Stock Outstanding Shares issued Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period Shares outstanding Share Based Compensation Arrangement By Share Based Payment Award Shares Outstanding Number Common stock, capital shares reserved for future issuance, additional shares reserved, maximum. Number of additional shares reserved for issuance, maximum Common Stock Capital Shares Reserved For Future Issuance Additional Shares Reserved Maximum Share-based compensation arrangement by share-based payment award, number of shares available for grant, shares reserved for issuance. Share-based compensation arrangement by share-based payment award, number of shares available for grant, grants in period. Share-based compensation arrangement by share-based payment award, number of shares available for grant, forfeitures in period. Share based compensation arrangement by share based payment award options shares available for grant. Shares Available For Grant Share Based Compensation Arrangement By Share Based Payment Award Options Shares Available For Grant Roll Forward Shares Available for Grant, Balance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Shares Available for Grant, Shares reserved for issuance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Shares Reserved For Issuance Shares Available for Grant, Options granted Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Grants In Period Shares Available for Grant, Options forfeited / cancelled Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Forfeitures In Period Shares Available for Grant, Balance Number of Options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward Options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Options granted, Number of Options Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Options forfeited / cancelled, Number of Options Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Options exercised, Number of Options Options Outstanding, Number of Options Vested, Number of Options Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares Exercisable, Number of Options Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Share-based compensation arrangement by share-based payment award options vested, weighted average exercise price. Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward Options Outstanding, Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Options granted, Weighted Average Exercise Price Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Options forfeited / cancelled, Weighted Average Exercise Price Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Options exercised, Weighted Average Exercise Price Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Options Outstanding, Weighted Average Exercise Price Vested, Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Options Vested Weighted Average Exercise Price Exercisable, 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 vested, weighted average remaining contractual term. Share based compensation arrangement by share based payment award options weighted-average remaining life. Weighted-Average Remaining Contractual Life Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Life [Abstract] Options Outstanding, Weighted-Average Remaining Contractual Life Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Vested, Weighted-Average Remaining Contractual Life Share Based Compensation Arrangement By Share Based Payment Award Options Vested Weighted Average Remaining Contractual Term Exercisable, Weighted-Average Remaining Contractual Life Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Share based compensation arrangement by share based payment award options intrinsic value. Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Intrinsic Value [Abstract] Options Outstanding, Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Vested, Aggregate Intrinsic Value Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 Exercisable, Aggregate Intrinsic Value Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Total compensation cost related to nonvested awards not yet recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Weighted-average period over nonvested awards expected to be recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Share-based compensation arrangement by share-based payment award, award vesting period, commencement date. Stock options granted Stock options granted at grant-date fair value Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Unrecognized compensation cost Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Vesting period commencing date Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Commencement Date Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Risk-free interest rate, minimum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum Risk-free interest rate, maximum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum Expected life (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Expected volatility, minimum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum Expected volatility, maximum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Research and Development Research And Development Expense [Member] General and Administrative General And Administrative Expense [Member] Total stock-based compensation 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] Warrants to Purchase Common Stock Warrant [Member] Common Stock Options Issued and Outstanding Employee Stock Option [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive securities Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Weighted-average number of shares - basic and diluted Number of consulting agreement members. Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Board of directors. Board of Directors Board Of Directors [Member] Investor Investor [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Number of consulting agreement members Number Of Consulting Agreement Members Consulting fees Related Party Transaction Expenses From Transactions With Related Party Amount owed to related party Due To Related Parties Current And Noncurrent