Entity Central Index Key Cover [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Trading Symbol Trading Symbol Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Entity Current Reporting Status Entity Current Reporting Status 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, Address Line Three Entity Address Address Line3 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 Interactive Data Current Entity Interactive Data Current Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation State Country Code Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report In-process research and development 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 Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Other assets: Other Assets [Abstract] Goodwill Goodwill In-process research and development Research Development In Process Other non-current assets Other Assets Noncurrent Total assets Assets Liabilities and Stockholders’ Equity Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses Accrued Liabilities Current Other current liabilities Other Liabilities Current Total current liabilities Liabilities Current Other non-current liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and Contingencies (Note 6) Commitments And Contingencies Stockholders’ equity: Stockholders Equity [Abstract] Preferred stock, $0.0001 par value; authorized 10,000,000 shares; none issued and outstanding Preferred Stock Value Common stock, $0.0001 par value; authorized 150,000,000 shares; 11,912,731 and 10,095,176 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity 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 Interest and other (expense) income, net. 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, net: Nonoperating Income Expense [Abstract] Interest and other (expense) income, net Interest And Other Expense Income Net Foreign currency transaction (loss) gain Foreign Currency Transaction Gain Loss Before Tax Total other (expense) income, net Nonoperating Income Expense Net loss Net Income Loss Net loss per 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 Stock issued during period, shares, restricted stock award vested. Stock issued during period shares through at the market facility net of issuance costs. Stock issued during period value through at-the-market facility net of issuance costs. Stock issued during period for commitment fee shares. Stock issued during period for commitment fee value. Stock issued during period shares through private placement. Stock issued during period value through private placement. 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] Statement [Line Items] Statement [Line Items] Beginning balance Beginning balance, shares Issuance of common stock in connection with restricted stock unit vesting Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures Issuance of common stock in connection with restricted stock unit vesting, shares Stock Issued During Period Shares Restricted Stock Award Vested Issuance of common stock in connection with purchase agreement Stock Issued During Period Value New Issues Issuance of common stock in connection with purchase agreement, shares Stock Issued During Period Shares New Issues Issuance of common stock through at-the-market facility, net of issuance costs Stock Issued During Period Value Through At Market Facility Net Of Issuance Costs Issuance of common stock through at-the-market facility, net of issuance costs, shares Stock Issued During Period Shares Through At Market Facility Net Of Issuance Costs Issuance of common stock for commitment fee Stock Issued During Period For Commitment Fee Value Issuance of common stock for commitment fee, shares Stock Issued During Period For Commitment Fee Shares Issuance of common stock through private placement Stock Issued During Period Value Through Private Placement Issuance of common stock through private placement, shares Stock Issued During Period Shares Through Private Placement Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Issuance of stock in connection with stock option exercises Stock Issued During Period Value Stock Options Exercised Issuance of stock in connection with stock option exercises, shares Stock Issued During Period Shares Stock Options Exercised Net loss Ending balance Ending balance, shares Fair value of shares issued for commitment fee. Non-cash interest expenses. Increase (decrease) in accrued expenses and other current liabilities. Proceeds from Paycheck Protection Program loan. 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] Stock-based compensation Share Based Compensation Depreciation Depreciation Fair value of shares issued for commitment fee Fair Value Of Shares Issued For Commitment Fee Loss on disposal of property and equipment Gain Loss On Disposition Of Assets Non-cash interest expense Non Cash Interest Expenses Changes in operating assets and liabilities Increase Decrease In Operating Capital [Abstract] Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other current liabilities Increase Decrease In Accrued Expenses And Other Current Liabilities Other non-current assets Increase Decrease In Other Noncurrent Assets 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 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, net of issuance costs Proceeds From Issuance Of Common Stock Proceeds from Paycheck Protection Program loan Proceeds From Paycheck Protection Program Loan Proceeds from the exercise of stock options Proceeds From Stock Options Exercised Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Net decrease 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, beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash and cash equivalents, end of period Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Operations and Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Accounting Policies [Abstract] Significant Accounting Polices Significant Accounting Policies [Text Block] Property Plant And Equipment [Abstract] Property and Equipment Property Plant And Equipment Disclosure [Text Block] Accounts Payable And Accrued Liabilities Current [Abstract] Accrued Expenses Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Leases [Abstract] Leases Lessee Operating Leases [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] Earnings Per Share [Abstract] Net Loss Per Share Earnings Per Share [Text Block] Restructuring And Related Activities [Abstract] Restructuring Restructuring And Related Activities Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Liquidity. Liquidity Liquidity Policy [Text Block] Going Concern Substantial Doubt About Going Concern [Text Block] Cash and Cash Equivalents Cash And Cash Equivalents Policy [Text Block] Goodwill Goodwill And Intangible Assets Policy [Text Block] Stock-Based Compensation Share Based Compensation Option And Incentive Plans Policy Use of Estimates Use Of Estimates Income Taxes Income Tax Policy [Text Block] Basic and Diluted Net Loss per Common Share Earnings Per Share Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Estimate Fair Value of Stock Options Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Table [Text Block] Schedule of Property and Equipment Property Plant And Equipment [Text Block] Schedule of Accrued Expenses Schedule Of Accounts Payable And Accrued Liabilities Table [Text Block] Reconciliation of Undiscounted Lease Liabilities to Total Lease Liabilities Lessee Operating Lease Liability Maturity Table [Text Block] Future Minimum Lease Payments Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Summary of Option Activity under 2018 Plan, 2013 Plan and 2010 Plan Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Summary of Restricted Stock Unit Activity under 2018 Plan Schedule Of Nonvested Restricted Stock Units Activity Table [Text Block] Summary of Stock-Based Compensation Expense Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block] Schedule of Number of Shares of Common Stock Underlying Potentially Dilutive Securities Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Aggregate offering price of common stock issuable under sales agreement. Organization, consolidation and presentation of financial statement. Organization, consolidation and presentation of financial statement. Organization Consolidation And Presentation Of Financial Statement [Table] Organization Consolidation And Presentation Of Financial Statement [Table] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] At The Market Facility. At-the-Market Facility At The Market Facility [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Weighted Average Weighted Average [Member] Collaborative Arrangement and Arrangement Other than Collaborative Type Of Arrangement [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Arrangements And Nonarrangement Transactions [Member] Lincoln park capital fund LLC. Lincoln Park Lincoln Park Capital Fund L L C [Member] Maximum Private Placement Private Placement [Member] Title of Individual Title Of Individual [Axis] Title of Individual Title Of Individual With Relationship To Entity [Domain] Directors, officers and employees. Directors, Officers and Employees Directors Officers And Employees [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Merger of Private Acer with opexa therapeutics incorporation and Opexa Merger Sub incorporation. Merger of Private Acer with opexa therapeutics incorporation and Opexa Merger Sub Incorporation Merger Of Private Acer With Opexa Therapeutics Incorporation And Opexa Merger Sub Incorporation [Member] Merger and reincorporation. Merger and Reincorporation Merger And Reincorporation [Member] Organization Consolidation and Presentation of Financial Statement [Line Items] Organization Consolidation And Presentation Of Financial Statement [Line Items] Accumulated deficit Net cash used in operating activities Aggregate offering price of common stock Aggregate Offering Price Of Common Stock Issuable Under Sales Agreement Proceeds from issuance of common stock gross. Issuance of common stock Issuance of common stock, price per share Sale Of Stock Price Per Share Proceeds from issuance of common stock gross Proceeds From Issuance Of Common Stock Gross Common stock offering costs Payments Of Stock Issuance Costs Shares value committed to be issued under agreement. Expected increase in maximum number of common stock shares may sell in single business day on regular purchases. Maximum number of common stock shares may sell in single business day on regular purchases. Market price of common stock at the time of sale and subject to maximum limit per regular purchase. Fair value of commitment fee shares. Shares value committed to be issued under agreement Shares Value Committed To Be Issued Under Agreement Expected increase in maximum number of common stock shares may sell in single business day on regular purchases Expected Increase In Maximum Number Of Common Stock Shares May Sell In Single Business Day On Regular Purchases Maximum number of common stock shares may sell in single business day on regular purchases Maximum Number Of Common Stock Shares May Sell In Single Business Day On Regular Purchases Market price of common stock at the time of sale and subject to maximum limit per regular purchase Market Price Of Common Stock At Time Of Sale And Subject To Maximum Limit Per Regular Purchase Fair value of the commitment fee shares, recorded to general and administrative expense along with other costs Fair Value Of Commitment Fee Shares Cost, Product and Service [Extensible List] Type Of Cost Good Or Service Extensible List Current liabilities Business combination date of completion Business Acquisition Effective Date Of Acquisition1 Business combination date of agreement Business Acquisition Date Of Acquisition Agreement1 Date of reincorporation. Merger incorporation description Business Acquisition Description Of Acquired Entity Date of reincorporation Date Of Reincorporation Schedule of significant accounting policies. Schedule of significant accounting policies. Schedule Of Significant Accounting Policies [Table] Schedule Of Significant Accounting Policies [Table] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Cash and Cash Equivalents Cash And Cash Equivalents [Member] Schedule Of Significant Accounting Policies [Line Items] Schedule Of Significant Accounting Policies [Line Items] Investments in money market funds Money Market Funds At Carrying Value 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 (years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Dividend rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Income tax expense (benefit) Income Tax Expense Benefit 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 Hardware and Software Computer Equipment [Member] Leasehold Improvements Leasehold Improvements [Member] Furniture and Fixtures Furniture And Fixtures [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Subtotal property and equipment, gross Property Plant And Equipment Gross Less accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Accrued contract manufacturing costs current. Accrued contract research and regulatory consulting. Accrued legal fees current. Accrued wages and accrued payroll taxes current. Accrued license fees current. Accrued accounting, audit, and tax fees current. Accrued miscellaneous expenses current. Accrued pre-commercial costs current. Accrued contract manufacturing Accrued Contract Manufacturing Costs Current Accrued contract research and regulatory consulting Accrued Contract Research And Regulatory Consulting Current Accrued legal Accrued Legal Fees Current Accrued payroll and payroll taxes Accrued Wages And Accrued Payroll Taxes Current Accrued license fees Accrued License Fees Current Accrued accounting, audit, and tax fees Accrued Accounting Audit And Tax Fees Current Accrued miscellaneous expenses Accrued Miscellaneous Expenses Current Accrued consulting Accrued Professional Fees Current Accrued precommercial costs Accrued Pre Commercial Costs Current Total accrued expenses Lease commencement date. Lease agreement date. Lessee Lease Description [Table] Lessee Lease Description [Table] Newton lease. Newton Lease Newton Lease [Member] Amended Newton Lease Amended Newton Lease [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Newton, Massachusetts MASSACHUSETTS Bend lease. Bend Lease Bend Lease [Member] Amended bend lease. Amended Bend Lease Amended Bend Lease [Member] Oregon OREGON Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Accounting Standards Update Type Of Adoption [Member] ASU 2016-02 Accounting Standards Update201602 [Member] Lessee Lease Description [Line Items] Lessee Lease Description [Line Items] Lease agreement date Lease Agreement Date Lease commencement date Lease Commencement Date Square feet of office space leased Area Of Land Lease expiration date Lease Expiration Date1 Maximum additional periods of option to extend the bend term. Option to extend bend term for duration period. Maximum additional periods of option to extend the bend term Maximum Additional Periods Of Option To Extend Bend Term Option to extend bend term for duration period Option To Extend Bend Term For Duration Period Operating lease right of use asset Operating Lease Right Of Use Asset Operating lease liability, current Operating Lease Liability Current Operating lease liability, non-current Operating Lease Liability Noncurrent Operating lease discount rate Lessee Operating Lease Discount Rate Operating lease, weighted average remaining lease term Operating Lease Weighted Average Remaining Lease Term1 Operating lease, cash payment made Operating Lease Payments Operating lease expense Operating Lease Expense Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List Operating lease liability Operating Lease Liability Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease Liability Current Statement Of Financial Position Extensible List Undiscounted lease liabilities for years ending December 31,: Operating Lease Liabilities Payments Due [Abstract] 2020 (remaining) Lessee Operating Lease Liability Payments Remainder Of Fiscal Year 2021 Lessee Operating Lease Liability Payments Due Next Twelve Months 2022 Lessee Operating Lease Liability Payments Due Year Two Total undiscounted lease liabilities Lessee Operating Lease Liability Payments Due Less effects of discounting Lessee Operating Lease Liability Undiscounted Excess Amount Total lease liabilities as of September 30, 2020 Total lease liabilities 2020 Operating Leases Future Minimum Payments Due Current 2021 Operating Leases Future Minimum Payments Due In Two Years 2022 Operating Leases Future Minimum Payments Due In Three Years Total Operating Leases Future Minimum Payments Due Agreement entered month and year. Commitments and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Counterparty Name Counterparty Name [Axis] Counterparty Name Repurchase Agreement Counterparty Name [Domain] Assistance Publique – Hôpitaux de Paris. Assistance Publique – Hôpitaux de Paris (“AP-HP”) Assistance Publique Hopitaux De Paris [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Private Acer. Private Acer Private Acer [Member] License Agreement Licensing Agreements [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Paycheck protection program loan. PPP Loan Paycheck Protection Program Loan [Member] Lender Name Line Of Credit Facility [Axis] Line of Credit Facility, Lender Line Of Credit Facility Lender [Domain] JPMorgan Chase Bank, N.A. JPMorgan Chase Bank, N.A J P Morgan Chase Bank N A [Member] Promissory note. Promissory Note Promissory Note [Member] Litigation Status Litigation Status [Axis] Litigation Status Litigation Status [Domain] Pending Litigation Pending Litigation [Member] Litigation Case Litigation Case [Axis] Litigation Case Litigation Case Type [Domain] Piper Sandler & Co. v. Acer Therapeutics Inc.. Piper Sandler & Co. Piper Sandler Co V Acer Therapeutics Inc [Member] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Agreement entered date Agreement Entered Month And Year Number of patent applications. Number of patent applications Number Of Patent Applications CARES act of 2020 aid loan amount. CARES act of 2020 aid loan amount C A R E S Act Of2020 Aid Loan Amount Minimum percentage of loan proceeds used to cover payroll costs eligible for loan forgiven. Debt Instrument, Term Debt Instrument Term Debt Instrument, fixed interest rate Debt Instrument Interest Rate Stated Percentage Minimum percentage of loan proceeds used to cover payroll costs eligible for loan forgiven Minimum Percentage Of Loan Proceeds Used To Cover Payroll Costs Eligible For Loan Forgiven Debt instrument, description Debt Instrument Description Loss contingency closing date. Financing aggregate consideration. Reimbursable expense. Loss contingency payable fees Loss Contingency Damages Sought Value Loss contingency closing date Loss Contingency Closing Date Financing aggregate consideration Financing Aggregate Consideration Reimbursement expenses Reimbursable Expense Gross proceeds from issuance of common stock. Stockholders equity. Stockholders equity. Stockholders Equity [Table] Stockholders Equity [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand eighteen stock incentive plan. 2018 Stock Incentive Plan Two Thousand Eighteen Stock Incentive Plan [Member] Two thousand ten and two thousand thirteen stock incentive plan. 2010 and 2013 Stock Incentive Plan Two Thousand Ten And Two Thousand Thirteen Stock Incentive Plan [Member] Executive officers and employees. Executive Officers and Employees Executive Officers And Employees [Member] Vesting Vesting [Axis] Vesting Vesting [Domain] One-year Anniversary of the Grant Date Share Based Compensation Award Tranche One [Member] Quarterly over Remaining Three Years Share Based Compensation Award Tranche Two [Member] January One Two Thousand and Twenty One. January 1, 2021 January One Two Thousand And Twenty One [Member] January One Two Thousand and Twenty Two. January 1, 2022 January One Two Thousand And Twenty Two [Member] Two thousand thirteen stock incentive plan. 2013 Stock Incentive Plan Two Thousand Thirteen Stock Incentive Plan [Member] 2010 Plan. 2010 Stock Incentive Plan Two Thousand Ten Plan [Member] Stockholders Equity [Line Items] Stockholders Equity [Line Items] Gross proceeds from issuance of common stock Gross Proceeds From Issuance Of Common Stock Shares value committed to be issued under agreement Maximum percentage of shares may be issued or sold based on outstanding shares immediately prior to execution of agreement. Threshold price per share for issuance of shares under agreement. Maximum percentage of shares may be issued or sold based on outstanding shares immediately prior to execution of agreement. Maximum Percentage Of Shares May Be Issued Or Sold Based On Outstanding Shares Immediately Prior To Execution Of Agreement Threshold price per share for issuance of shares under agreement Threshold Price Per Share For Issuance Of Shares Under Agreement Beneficially ownership percentage Equity Method Investment Ownership Percentage Number of common stock authorized for issuance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Number of share outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Share-based compensation arrangement by share-based payment award, description Share Based Compensation Arrangement By Share Based Payment Award Description Share-based compensation arrangement by share-based payment award, expiration date Share Based Compensation Arrangement By Share Based Payment Award Expiration Date Share-based compensation arrangement by share-based payment award, percentage of outstanding our common stock Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Outstanding Stock Maximum Options contractual term Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period Share-based compensation arrangement by share-based payment award, stock options vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Share-based compensation arrangement by share-based payment award, Vesting percentage Share-based compensation arrangement by share-based payment award, Vesting percentage Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage Available for the grant of future awards Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Awards granted under the plan Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward Number of Shares, Options outstanding at beginning of period Number of Shares, Options Granted Number of Shares, Cancelled/forfeited Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Number of Shares, Options outstanding at end of period Number of Shares, Options exercisable at end of period Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted Average Exercise Price, Options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward Weighted Average Exercise Price, Options outstanding at beginning of period Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted Average Exercise Price, Options Granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted Average Exercise Price, Cancelled/forfeited Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Weighted Average Exercise Price, Options outstanding at end of period Weighted Average Exercise Price, Options exercisable at end of period Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted Average Remaining Contract Term, Options Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract] Weighted Average Remaining Contractual Term, Options outstanding at beginning of period Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted Average Remaining Contractual Term, Options exercisable at end of period Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Intrinsic Value Roll Forward Aggregate Intrinsic Value, Options outstanding at end of period Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Aggregate Intrinsic Value, Options exercisable at end of period Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Units (RSUs) Restricted Stock Units R S U [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Restricted Stock Units Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Roll Forward Number of Shares, Non-Vested outstanding at beginning of period Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Number of Shares, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Number of Shares, Vested/settled Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Number of Shares, Cancelled/forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Number of Shares, Non-Vested outstanding at end of period Weighted Average Grant Date Fair Value Per Share Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Roll Forward Weighted Average Grant Date Fair Value Per Share, Non-Vested outstanding at beginning of the period Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Per Share, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Per Share, Vested/settled Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Per Share, Cancelled/forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Per Share, Non-Vested outstanding at end of the period Aggregate Intrinsic Value, Non-Vested outstanding at beginning of the period Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding Aggregate Intrinsic Value, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Intrinsic Value Aggregate Intrinsic Value, Cancelled/forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Intrinsic Value Aggregate Intrinsic Value, Non-Vested outstanding at end of the period Unrecognized compensation expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Share based compensation arrangement by share based payment award, Average remaining vesting period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Weighted average grant date fair value of options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value 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] 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] Options to purchase common stock and unvested unsettled restricted stock units. Options to purchase common stock and unvested, unsettled restricted stock units Options To Purchase Common Stock And Unvested Unsettled Restricted Stock Units [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Common stock dilutive securities Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Schedule Of Restructuring And Related Costs [Table] Schedule Of Restructuring And Related Costs [Table] Restructuring Type Restructuring Cost And Reserve [Axis] Type of Restructuring Type Of Restructuring [Domain] One Time Employee Severance Employee Severance [Member] Restructuring Cost And Reserve [Line Items] Restructuring Cost And Reserve [Line Items] One-time severance-related charge Severance Costs1 Corporate restructuring, reduction of full-time workforce percentage Restructuring And Related Cost Number Of Positions Eliminated Period Percent Corporate restructuring, reduction of full-time workforce employees Restructuring And Related Cost Expected Number Of Positions Eliminated Remaining liability Restructuring Reserve Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Proceeds from issuance of common stock