Document and Entity Information [Abstract] Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Document Type Document Annual Report Document Period End Date Document Period End Date Current Fiscal Year End Date Current Fiscal Year End Date Document Transition Report Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Public Float Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Documents Incorporated by Reference Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Assets Current [Abstract] Current assets: Cash And Cash Equivalents At Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Available-for-sale Securities, Current Investments Total Fair Value Prepaid Expense And Other Assets Current Prepaid expenses and other current assets Assets Current Total current assets Property Plant And Equipment Net Equipment, net Property and equipment, net Finite-Lived Intangible Assets, Net Intangible assets, net Intangible assets, net Goodwill Goodwill Operating Lease, Right-of-Use Asset Right-of-use assets Other Assets Noncurrent Other assets Assets Total assets Liabilities and Stockholders’ Equity LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities Current [Abstract] Current liabilities: Accounts Payable Current Accounts payable Accrued Liabilities, Current Accrued expenses Accrued expenses Deferred Rent Credit, Current Deferred rent, current Liabilities Current Total current liabilities Deferred Rent Credit, Noncurrent Deferred rent, net of current Operating Lease, Liability, Noncurrent Lease liability Non-current operating lease liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 10) Stockholders Equity [Abstract] Stockholders' equity: Preferred Stock Value Preferred stock, $0.001 par value; authorized – 50,000 shares; no shares issued and outstanding Common Stock, Value, Issued Common stock, $0.001 par value; authorized – 500,000 shares; issued and outstanding – 20,825 shares and 20,593 shares at December 31, 2019 and 2018, respectively Additional Paid in Capital, Common Stock Additional paid-in-capital Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive income (loss) Retained Earnings Accumulated Deficit Accumulated deficit Stockholders Equity Balance Balance Total stockholders' equity Liabilities And Stockholders Equity Total liabilities and stockholders' equity Preferred Stock Par Or Stated Value Per Share Preferred stock, par value 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 Or Stated Value Per Share Common stock, par value Common Stock Shares Authorized Common stock, shares authorized Common Stock Shares Issued Common stock, shares issued Common Stock Shares Outstanding Balance, shares Balance, shares Common stock, shares outstanding Consolidated Statements Of Operations And Comprehensive Loss [Abstract] Revenues Revenue Operating Expenses [Abstract] Operating expenses: General and Administrative Expense General and administrative Research And Development Expense Research and development expense Research and development Amortization of Intangible Assets Amortization of intangible assets Operating Expenses Total operating expenses Interest Income (Expense), Net [Abstract] Other income (expense): Interest Income, Operating Interest income Other Noninterest Expense Other Interest Income (Expense), Net Total other income Operating Income Loss Loss from operations, before income taxes Income Tax Expense (Benefit) Income tax provision (benefit) Income tax benefit Net Income Loss Net loss Net loss Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on available-for-sale securities, net of tax Unrealized gain (losses) on available-for-sale securities Unrealized gains (losses) on available-for-sale securities Comprehensive Income Net Of Tax Comprehensive loss Earnings Per Share Basic And Diluted [Abstract] Net loss per share: Earnings Per Share Basic And Diluted Basic and diluted net loss per share Weighted Average Number Of Share Outstanding Basic And Diluted Weighted average shares used to compute net loss per common share - basic and diluted Consolidated Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Accumulated Deficit [Member] Sale of Stock [Axis] Sale Of Stock Name Of Transaction [Domain] Sale of Stock [Domain] Private Placement [Member] Private Placement [Member] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Warrant [Member] Warrants to purchase common stock [Member] Rights Offering [Member] Rights Offering [Member] Rights Offering [Member] Sale of Stock, Number of Shares Issued in Transaction Shares sold Issuance of common stock, shares Stock Issued During Period, Value, New Issues Shares issued Stock Issued During Period Shares New Issues Shares issued, shares Shares issued Stock Issued During Period, Value, Stock Options Exercised Issuance of shares upon exercise of stock options Stock Issued During Period Shares Stock Options Exercised Options exercised, Number of shares Warrants exercised Issuance of shares upon exercise of stock options, shares Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of shares under employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of shares under employee stock purchase plan, shares Stock Issued During Period, Value, Restricted Stock Award, Gross Issuance of shares upon vesting of restriced stock units Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of shares upon vesting of restriced stock units, shares Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of shares upon vesting of share-based compensation Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of shares upon vesting of share-based compensation, shares Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Tax payments related to shares withheld for vested restricted stock units. Tax Payments Related To Shares Withheld For Vested Restricted Stock Tax payments related to shares withheld for vested restricted stock units Rights [Member] Rights [Member] Share Price Price per share Payments of Stock Issuance Costs Issuance costs Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided By Used In Operating Activities [Abstract] Cash flows from operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Depreciation Depreciation and amortization Depreciation expense Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of fixed assets Share Based Compensation Stock-based compensation Investment Income, Net, Amortization of Discount and Premium Net premium amortization on investments Deferred rent/landlord incentive for tenant improvements. Deferred Rent/Landlord Incentive For Tenant Improvements Landlord incentive for tenant improvements Increase Decrease In Operating Capital [Abstract] Changes in operating assets and liabilities: Increase Decrease In Prepaid Deferred Expense And Other Assets Prepaid expenses and other current assets Increase Decrease In Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Noncash Adjustment Right-of-use Assets Noncash Adjustment Right-of-use Assets Right-of-use assets Increase (Decrease) in Other Operating Assets Other assets Increase in other assets Noncash Adjustment Lease Liabilities Noncash Adjustment Lease Liabilities Lease liabilities Increase Decrease In Other Operating Liabilities Other current and non-current liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Cash used in operating activities Net Cash Provided By Used In Investing Activities [Abstract] Cash flows from investing activities: Payments To Acquire Property Plant And Equipment Purchases of property and equipment Payments to Acquire Marketable Securities Purchases of investments Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Maturities of investments Proceeds from Sale and Maturity of Marketable Securities Sales of investments Net Cash Provided By Used In Investing Activities Net cash provided by (used in) investing activities Net Cash Provided By Used In Financing Activities [Abstract] Cash flows from financing activities: Proceeds from exercises of stock options and warrants. Proceeds From Exercises Of Stock Options And Warrants Proceeds from exercises of stock options and warrants Proceeds from Issuance of Private Placement Proceeds from issuance of common stock from private placements, net of issuance costs of $199 Proceeds from Stock Plans Proceeds from issuance of common stock under employee stock purchase plan Proceeds from Issuance of Warrants Proceeds from issuance of common stock from rights offering, net of issuance costs of $213 Payments Related to Tax Withholding for Share-based Compensation Tax payments related to shares withheld for vested restricted stock units Net Cash Provided By Used In Financing Activities Net cash provided by financing activities Cash And Cash Equivalents Period Increase Decrease Net increase (decrease) in cash and cash equivalents Supplemental disclosure of noncash investing and financing activities: Contribution of Property Equipment purchases included in accounts payable and accrued expenses Description Of The Business [Abstract] Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Description Of The Business Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Investments And Fair Value Of Financial Instruments [Abstract] Fair Value Disclosures [Text Block] Investments And Fair Value Of Financial Instruments Supplemental Balance Sheet Components Disclosure [Abstract] Balance Sheet Components [Abstract] Supplemental Balance Sheet Disclosures [Text Block] Balance Sheet Components Goodwill [Abstract] Business Combination Disclosure [Text Block] Goodwill Stockholders' Equity And Stock-Based Compensation [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Stockholders' Equity And Stock-Based Compensation Research Grants And Agreements [Abstract] Research, Development, and Computer Software Disclosure [Text Block] Research Grants And Agreements Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Employee Benefit Plans [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans Selected Quarterly Financial Data [Abstract] Quarterly Financial Information [Text Block] Selected Quarterly Financial Data Consolidation, Policy [Policy Text Block] Principles Of Consolidation Use Of Estimates Use Of Estimates Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration Of Credit Risk Fair Value Of Financial Instruments Policy Fair Value Of Financial Instruments Cash and Cash Equivalents, Policy [Policy Text Block] Cash, Cash Equivalents, And Investments Property, Plant and Equipment, Policy [Policy Text Block] Property and Equipment Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Intangible Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Long-Lived Assets Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation Research and Development Expense, Policy [Policy Text Block] Research And Development Costs Patent Costs [Policy Text Block] Patent Costs [Policy Text Block] Patent Costs Regulatory Income Taxes, Policy [Policy Text Block] Income Taxes Comprehensive Income, Policy [Policy Text Block] Comprehensive Loss Earnings Per Share Policy [Text Block] Net Loss Per Share Segment Reporting, Policy [Policy Text Block] Segment And Geographical Information New Accounting Pronouncements, Policy [Policy Text Block] Recently Accounting Pronouncements Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Anti-Dilutive Shares Excluded From Computation Of Diluted Net Loss Per Share Available-for-sale Securities [Table Text Block] Schedule Of Available-For-Sale Securities Investments Classified by Contractual Maturity Date [Table Text Block] Schedule Of Contractual Maturities Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value Of Financial Assets Measured On A Recurring Basis Property, Plant and Equipment [Table Text Block] Schedule Of Property And Equipment, Net Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule Of Intangible Assets, Net Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule Of Amortization Of Intangible Assets Schedule of Accrued Liabilities [Table Text Block] Schedule Of Accrued Expenses Stockholders' Equity [Table] Stockholders' Equity [Table] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Two Thousand Seventeen Employee Stock Purchase Plan [Member] Two Thousand Seventeen Employee Stock Purchase Plan [Member] 2017 Employee Stock Purchase Plan [Member] Employee Stock Option [Member] Options outstanding [Member] Stockholders' Equity [Line Items] Stockholders' Equity [Line Items] Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Summary Of Stock Warrant Activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Summary Of Stock Option Activity Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Schedule Of Fair Value Of Employee Stock Options Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Summary Of Stock-Based Compensation Expense Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Components Of Deferred Tax Assets Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconcilement Of Tax Rates Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Reconciliation Of Unrecognized Tax Benefit Accounts Schedule Of Information Related To Right-Of-Use Assets And Lease Liabilities [Table Text Block] Schedule Of Information Related To Right-Of-Use Assets And Lease Liabilities [Table Text Block] Schedule Of Information Related To Right-Of-Use Assets And Lease Liabilities Schedule of Quarterly Financial Information [Table Text Block] Schedule Of Selected Quarterly Financial Data Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Equipment [Member] Equipment [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Technology Based Intangible Assets [Member] Acquired Patents And Licenses [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Cash, Cash Equivalents, Short-term and Long-term Investments Cash, Cash Equivalents, Short-term and Long-term Investments Cash, cash equivalents, and investments Proceeds From Rights Offering Proceeds From Rights Offering Proceeds from rights offering Property, Plant and Equipment, Useful Life Useful life Asset Impairment Charges Long-lived asset impairment Finite-Lived Intangible Asset, Useful Life Intangible asset useful life Fees and Commissions, Executive Search Patent costs Liability for Uncertainty in Income Taxes, Noncurrent 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 Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Restricted Stock Units R S U [Member] 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] Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Total Equity Method Investment, Other than Temporary Impairment Impairment on investments Amount of transfers of financial instruments classified in shareholders' equity measured on a recurring basis out of level 1, 2, or 3 of the fair value hierarchy into level 1, 2, or 3. Fair Value, Equity, Level 1, 2, and 3 Transfers, Amount Transfers between level 1, 2, or 3 Schedule Of Available For Sale Securities [Table] Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Major Types of Debt and Equity Securities [Domain] U S Treasury Securities [Member] US Treasury Securities [Member] Schedule Of Available For Sale Securities [Line Items] Available For Sale Securities Amortized Cost Cost Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Gross Unrealized Losses Available For Sale Securities Debt Maturities Within One Year Fair Value Due in one year Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 [Member] Fair Value Inputs Level2 [Member] Level 2 [Member] Cash And Cash Equivalents [Member] Cash and cash equivalents [Member] Investments [Member] Investments [Member] Fair Value By Asset Class [Axis] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Asset Class [Domain] Money Market Funds [Member] Cash and money market funds [Member] U S Government Corporations And Agencies Securities [Member] U.S. government and agency securities [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] Cash And Cash Equivalents Fair Value Disclosure Total cash and cash equivalents Investments Fair Value Disclosure Total investments Assets Fair Value Disclosure Total assets measured at fair value Schedule of Balance Sheet Components [Table] Schedule of Balance Sheet Components [Table] Title of Individual [Axis] Title Of Individual With Relationship To Entity [Domain] Relationship to Entity [Domain] Executive Officer [Member] Executive Officer [Member] Balance Sheet Components [Line Items] Balance Sheet Components [Line Items] Tenant Improvement Allowance, Capitalized Tenant Improvement Allowance, Capitalized Improvement allowance, capitalized Accrued Employee Benefits, Current Compensation expense Schedule of Property, Plant and Equipment [Table] Leasehold Improvements [Member] Leasehold Improvements [Member] Laboratory Equipment [Member] Laboratory Equipment [Member] Laboratory Equipment [Member] Furniture And Fixtures [Member] Furniture, Fixtures, And Equipment [Member] Software And Software Development Costs [Member] Software [Member] Construction In Progress [Member] Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Gross Equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation and amortization Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Gross Intangible assets, gross Finite-Lived Intangible Assets, Accumulated Amortization Less: Accumulated amortization Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2024 Finite-Lived Intangible Assets, Amortization Expense, after Year Five Thereafter Carrying value as of the balance sheet date of obligations and payables pertaining to clinical trials. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Clinical Trials, Current Accrued clinical Accrued Professional Fees, Current Professional fees Accrued Property And Equipment Accrued Property And Equipment Property and equipment Other Accrued Liabilities, Current Other Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] ThelioPulse, Inc., BioElectroMed Corp. And NanoBlate Corp. [Member] Theliopulse Inc. Bioelectromed Corp. And Nanoblate Corp. [Member] TPI, BEM And NB [Member] Business Acquisition, Equity Interests Issued or Issuable [Line Items] Business Combination, Consideration Transferred Aggregate consideration Equity Method Investment, Ownership Percentage Ownership percentage Goodwill, Impairment Loss Goodwill impairment Related Party [Axis] Related Party [Domain] Related Party [Domain] MDB Capital Group, LLC [Member] Mdb Capital Group Llc [Member] MDB Capital Group, LLC [Member] Board Of Directors Chairman [Member] Chairman, Robert W. Duggan [Member] Director [Member] Directors [Member] Officer [Member] Officer [Member] Certain Employees [Member] Certain Employees [Member] Certain Employees [Member] I P O [Member] Initial Public Offering [Member] Performance Shares [Member] Performance Shares [Member] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] General And Administrative Expense [Member] Sales, general and administrative [Member] Research And Development Expense [Member] Research and development [Member] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share Based Compensation Award Tranche One [Member] First Vesting Portion [Member] Share Based Compensation Award Tranche Two [Member] Second Vesting Portion [Member] Share Based Compensation Award Tranche Three [Member] Change In Control [Member] Class of Warrant or Right [Axis] Class Of Warrant Or Right [Domain] Class of Warrant or Right [Domain] Investment, Name [Axis] Equity Method Investee Name [Domain] Investment, Name [Domain] Two Thousand Seventeen Inducement Equity Incentive Plan [Member] Two Thousand Seventeen Inducement Equity Incentive Plan [Member] 2017 Inducement Equity Incentive Plan [Member] Two Thousand Seventeen Plan [Member] Two Thousand Seventeen Plan [Member] 2017 Plan [Member] Shares Issued, Price Per Share Price per share Sale of Stock, Consideration Received on Transaction Net proceeds Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Right entitlement to holder Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award Shares purchased Equity Method Investment, Aggregate Cost Investment Class of Warrant or Right, Outstanding Warrants/rights outstanding Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Cliff vest date Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Term period Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Additional common stock reserved for issuance Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Options granted, Number of shares Options granted Increase in shares available for issuance threshold of common stock outstanding, number of shares. Increase In Shares Available For Issuance Threshold Of Common Stock Outstanding, Number Of Shares Increase in shares available for issuance threshold of common stock outstanding, number of shares Increase in shares available for issuance threshold of common stock outstanding, percent outstanding. Increase In Shares Available For Issuance Threshold Of Common Stock Outstanding, Percent Outstanding Increase in shares available for issuance threshold of common stock outstanding, percent outstanding Class of Warrant or Right, Exercise Price of Warrants or Rights1 Exercise price of warrants/rights Exercisable period of warrants or rights. Class of Warrant or Right, Exercisable Period Exercisable period of warrants or rights Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Units granted during period Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation Reduction to APIC from shares withheld for tax Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights Number of common shares called by issuance of warrants Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Exercisable, Weighted average exercise price per share Exercise price Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate intrinsic value exercisable options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Fair value of options vested Allocated Share Based Compensation Expense Total stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Weighted average remaining contractual life Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Ending Balance, Number of shares Beginning Balance, Number of shares Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Options canceled, Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Options expired, Number of shares Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Ending Balance, Weighted average exercise price per share Beginning Balance, Weighted average exercise price per share Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Options granted, Weighted average exercise price per share Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Options exercised, Weighted average exercise price per share Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Options expired, Weighted average exercise price per share Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted average remaining contractual life (in years) Weighted average remaining life Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable, Number of shares Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Options canceled, Weighted average exercise price per share Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term Weighted average remaining life, exercisable Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term 1 Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Risk-free interest rate Schedule of Research and Development Arrangement, Contract to Perform for Others [Table] Old Dominion University Research Foundation [Member] Old Dominion University Research Foundation [Member] ODURF [Member] ODURF And Eastern Virginia Medical School [Member] Odurf And Eastern Virginia Medical School [Member] ODURF And Eastern Virginia Medical School [Member] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Research And Development Arrangement Contract To Perform For Others Type [Domain] Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Sponsored research activities. Sponsored Research Agreement Sra [Member] Sponsored Research Agreement ("SRA") [Member] Research and Development Arrangement, Contract to Perform for Others [Line Items] Research and development budget. Research And Development Budget Research and development budget Period of time for each Sponsored Research Agreement ("SRA"). Sponsored Research Agreement, Term Period Period of time for Sponsored Research Agreement ("SRA") Income Taxes [Table] Income Taxes [Table] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Designated tax department of the government that is entitled to levy and collect income taxes from the entity in its country and state of domicile. Domestic And State Authority [Member] Federal And California [Member] Domestic Country [Member] Federal [Member] State And Local Jurisdiction [Member] California [Member] Income Taxes [Line Items] Income Taxes [Line Items] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate U.S. federal statutory tax rate Federal statutory tax rate Operating Loss Carryforwards Net operating loss carryforwards Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYYformat. Operating Loss Carryforwards, Expiration Year Net operating loss carryforward, expiration Tax Credit Carryforward, Amount Research and development credit carryforward Net Operating Loss Carryforward Taxable Income Threshold, Percentage Net Operating Loss Carryforward Taxable Income Threshold, Percentage NOL, percent of taxable income Expiration date of the tax credit carryforward, in CCYY format. Tax Credit Carryforward, Expiration Year Research and developmen tax credit carryforward, expiration Unrecognized Tax Benefits Unrecognized tax benefit, Ending balance Unrecognized tax benefit, Beginning balance Total unrecognized tax benefit Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Accrued interest or penalties Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income and expense. Deferred Tax Assets, Deferred Income And Expense Temporary differences Deferred Tax Assets, Tax Credit Carryforwards, Research Credits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock compensation Deferred Tax Asset, Lease Liability Deferred Tax Asset, Lease Liability Lease liability under ASC 842 Deferred Tax Assets, Operating Loss Carryforwards Net operating loss carryforwards Deferred Tax Assets, Gross Total deferred tax assets before valuation allowance Deferred Tax Assets, Valuation Allowance Valuation allowance Deferred Tax Assets, Net of Valuation Allowance Total deferred tax assets after valuation allowance Deferred Tax Liabilities, Inventory Technology deferred tax liability Deferred Tax Liability, Right-of-use Assets Deferred Tax Liability, Right-of-use Assets Right of use assets under ASC 842 Deferred Tax Assets, Net Net deferred tax assets Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance Valuation allowance Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent Tax reform Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Permanent differences Effective Income Tax Rate Reconciliation, State and Local Income Taxes State tax benefit and other Effective Income Tax Rate, Continuing Operations Effective tax rate Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Gross increases - tax positions in prior periods Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Gross decreases - tax positions in prior periods Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Gross increases - tax position in current period Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities Settlements Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Lapses in statutes of limitations Schedule of Related Party Transactions, by Related Party [Table] Wilson Sonsini Goodrich And Rosati (WSGR) [Member] Wilson Sonsini Goodrich And Rosati Wsgr [Member] Wilson Sonsini Goodrich And Rosati (WSGR) [Member] Related Party Transaction [Line Items] Related Party Transaction, Expenses from Transactions with Related Party Related party expenses Commitments and Contingencies [Table] Commitments and Contingencies [Table] Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update201602 [Member] Accounting Standards Update 2016-02 [Member] Commitments and Contingencies [Line Items] Commitments and Contingencies [Line Items] Area of leases. Area Of Lease Lessee Leasing Arrangements, Operating Leases, Term of Contract Lease term Increase (Decrease) In Operating Right-Of-Use Assets Increase (Decrease) In Operating Right-Of-Use Assets Increase in right-of-use assets Increase (Decrease) In Operating Lease Liability Increase (Decrease) In Operating Lease Liability Increase in lease liability Operating Leases, Rent Expense, Net Rent expense, including common area maintenance charges Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 2023 Lessee, Operating Lease, Liability, Payments, Thereafter Lessee, Operating Lease, Liability, Payments, Thereafter Thereafter Operating Leases, Future Minimum Payments Due Total lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less imputed interest Operating Lease, Liability Total lease liabilities Total lease liabilities Operating Lease, Payments Cash paid for operating lease liabilities Operating Lease Liabilities Arising From ROU Assets, Including Impact Of Adopting ASC 842 Operating Lease Liabilities Arising From ROU Assets, Including Impact Of Adopting ASC 842 Operating lease liabilities arising from ROU assets including impact of ASC 842 adoption Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term Operating Lease, Weighted Average Discount Rate, Percent Weighted average discount rate Defined Benefit Plan, Contributions by Employer Employer matching contributions