Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accounts receivable Accounts Receivable Net Current Prepaid expenses Prepaid Expense Current Other current assets Other Assets Current Short term investments Held To Maturity Securities Current TOTAL CURRENT ASSETS Assets Current Property and equipment, net Property Plant And Equipment Net Intangible assets, net Finite Lived Intangible Assets Net Other 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 Accrued payroll and benefits Employee Related Liabilities Current Deferred rent Deferred Rent Credit Current Deferred revenue Deferred Revenue Current Derivative liabilities Derivative Liabilities Current Note Payable Notes Payable Current Other current liabilities Other Liabilities Current TOTAL CURRENT LIABILITIES Liabilities Current LONG-TERM LIABILITIES Liabilities Noncurrent [Abstract] Deferred rent, net of current portion Deferred Rent Credit Noncurrent Deferred revenue, net of current portion Deferred Revenue Noncurrent Note Payable, net of current portion Long Term Notes Payable Other non-current liabilities Other Liabilities Noncurrent TOTAL LONG-TERM LIABILITIES Liabilities Noncurrent Commitments and contingencies (Note 7) Commitments And Contingencies STOCKHOLDERS’ EQUITY Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Arrowhead Pharmaceuticals, Inc. stockholders' equity: Stockholders Equity [Abstract] Preferred stock, $0.001 par value; 5,000,000 shares authorized; 0 and 15,652 shares issued and outstanding as of June 30, 2017 and September 30, 2016 Preferred Stock Value Common stock, $0.001 par value; 145,000,000 shares authorized; 74,772,103 and 69,746,685 shares issued and outstanding as of June 30, 2017 and September 30, 2016, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total Arrowhead Pharmaceuticals, Inc. stockholders' equity Stockholders Equity Noncontrolling interest Minority Interest TOTAL STOCKHOLDERS’ EQUITY Stockholders Equity Including Portion Attributable To Noncontrolling Interest 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 Income Statement [Abstract] REVENUE Revenues OPERATING EXPENSES Operating Expenses [Abstract] Research and development Research And Development Expense Excluding Acquired In Process Cost Salaries and payroll-related costs Labor And Related Expense General and administrative expenses General And Administrative Expense Stock-based compensation Allocated Share Based Compensation Expense Depreciation and amortization Depreciation And Amortization TOTAL OPERATING EXPENSES Operating Expenses OPERATING LOSS Operating Income Loss OTHER INCOME (EXPENSE) Nonoperating Income Expense [Abstract] Interest income (expense), net Interest Income Expense Nonoperating Net Change in value of derivatives Unrealized Gain Loss On Derivatives Other income (expense) Other Nonoperating Income Expense TOTAL OTHER INCOME (EXPENSE) Nonoperating Income Expense LOSS BEFORE INCOME TAXES Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision for income taxes Income Tax Expense Benefit NET LOSS Profit Loss NET LOSS PER SHARE - BASIC & DILUTED Earnings Per Share Basic And Diluted Weighted average shares outstanding - basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX: Comprehensive Income Net Of Tax [Abstract] Foreign Currency Translation Adjustments Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax COMPREHENSIVE LOSS Comprehensive Income Net Of Tax Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid In Capital [Member] Accumulated Other Comprehensive Income (loss) Accumulated Other Comprehensive Income [Member] Accumulated Deficit Retained Earnings [Member] Non-controlling Interest Noncontrolling Interest [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Amgen Incorporation. Amgen Amgen Incorporation [Member] Statement [Line Items] Statement [Line Items] Beginning Balance, Amount Beginning Balance, Shares Shares Outstanding Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Exercise of stock options, Amount Stock Issued During Period Value Stock Options Exercised Exercise of stock options, Shares Stock Issued During Period Shares Stock Options Exercised Common stock- Restricted Stock Units vesting, Amount Stock Issued During Period Value Restricted Stock Award Gross Common stock- Restricted Stock Units vesting, Shares Stock Issued During Period Shares Restricted Stock Award Gross Stock issuances Stock Issued During Period Value New Issues Stock issuances, Shares Stock Issued During Period Shares New Issues Preferred stock converted to common stock, Amount Stock Issued During Period Value Conversion Of Convertible Securities Preferred stock converted to common stock, Shares Stock Issued During Period Shares Conversion Of Convertible Securities Foreign currency translation adjustments Net loss Ending Balance, Amount Ending Balance, Shares Stock issued, price per share Shares Issued Price Per Share Proceeds from exercises of warrants and stock options. Property and equipment purchased through tenant improvement allowance financing. The amount of cash received during the period for refundable income tax credits. Statement Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Change in value of derivatives Stock-based compensation Share Based Compensation Amortization/(accretion) of note premiums Investment Income Net Amortization Of Discount And Premium Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Prepaid expenses and Other Current Assets Increase Decrease In Prepaid Deferred Expense And Other Assets Deferred revenue Increase Decrease In Deferred Revenue Accounts payable Increase Decrease In Accounts Payable Accrued expenses Increase Decrease In Accrued Liabilities Other Increase Decrease In Other Operating Liabilities NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES Net Cash Provided By Used In Operating Activities Continuing Operations CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Purchases of marketable securities Payments To Acquire Marketable Securities Proceeds from sale of marketable securities Proceeds From Sale And Maturity Of Marketable Securities NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES Net Cash Provided By Used In Investing Activities Continuing Operations CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Principal payments on capital leases and notes payable Repayments Of Long Term Capital Lease Obligations Payments of taxes for net share settled restricted stock unit issuances Payments Related To Tax Withholding For Share Based Compensation Proceeds from the exercises of warrants and stock options Proceeds From Exercises Of Warrants And Stock Options Proceeds from the issuance of common stock Proceeds From Issuance Of Common Stock NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities Continuing Operations NET INCREASE (DECREASE) IN CASH Cash And Cash Equivalents Period Increase Decrease CASH AT BEGINNING OF PERIOD CASH AT END OF PERIOD Supplementary disclosures: Supplemental Cash Flow Information [Abstract] Interest Paid Interest Paid Property and equipment purchased through tenant improvement allowance financing Property And Equipment Purchased Through Tenant Improvement Allowance Financing Income Tax Credits Refunded Proceeds From Refundable Income Tax Credits Income Tax Paid Income Taxes Paid Accounting Policies [Abstract] Organization and Significant Accounting Policies Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block] Collaboration and license agreements. Collaboration And License Agreements [Abstract] Collaboration and License Agreements – Amgen, Inc Collaborative Arrangement Disclosure [Text Block] Investments All Other Investments [Abstract] Investments Cost And Equity Method Investments Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment Property Plant And Equipment Disclosure [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Equity [Abstract] Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Basis of presentation and use of estimates. Basis of Presentation and Use of Estimates Basis Of Presentation And Use Of Estimates Policy [Text Block] Cash and Cash Equivalents Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Concentration of Credit Risk Concentration Risk Credit Risk Investments Investment Policy [Text Block] Property and Equipment Property Plant And Equipment Policy [Text Block] Intangible Assets subject to amortization Goodwill And Intangible Assets Policy [Text Block] Disclosure of accounting policy for contingent consideration obligations related to acquisitions. Contingent Consideration Contingent Consideration Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Allowance for Doubtful Accounts Trade And Other Accounts Receivable Policy Research and Development Research And Development Expense Policy Earnings (Loss) per Share Earnings Per Share Policy [Text Block] Stock-Based Compensation Share Based Compensation Option And Incentive Plans Policy Derivative Assets and Liabilities Derivatives Policy [Text Block] Income Taxes Income Tax Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Summary of Short-term Investments Held To Maturity Securities [Text Block] Summary of Property and Equipment Property Plant And Equipment [Text Block] Schedule of Intangible Assets Schedule Of Intangible Assets And Goodwill Table [Text Block] Summary of Information About Warrants Schedule Of Stockholders Equity Note Warrants Or Rights [Text Block] Future Minimum Lease Payments Under Operating Leases Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Future Principal Payments Under Note Payable Schedule Of Debt Instruments [Text Block] Summarized Information about Stock Options Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Assumptions Used to Value Stock Options Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Summary of Share Activity Related to RSUs Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Warrant Warrant [Member] Liability Class Fair Value By Liability Class [Axis] Fair Value by Liability Class Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Exchange rights. Exchange rights Exchange Rights [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] Fair Value Measurements for Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Assumptions Used in Valuing Derivative Liabilities Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block] Reconciliation of Derivative Liability Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] Increase decrease in cash and investments. Proceeds from upfront payments and equity investments. Net cash provided by (used in) operating activities, excluding upfront payment received. Organization and significant accounting policies. Schedule Of Investments [Table] Schedule Of Investments [Table] Type of Arrangement and Non-arrangement Transactions Type Of Arrangement [Axis] Arrangements and Non-arrangement Transactions Arrangements And Nonarrangement Transactions [Member] ARO-LPA agreement. ARO-LPA Agreement A R O L P A Agreement [Member] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] Common stock purchase agreement. Common Stock Purchase Agreement Common Stock Purchase Agreement [Member] Range Range [Axis] Range Range [Member] Maximum Maximum [Member] Minimum Minimum [Member] Organization And Significant Accounting Policies [Line Items] Organization And Significant Accounting Policies [Line Items] Net increase (decrease) in cash and investments Increase Decrease In Cash And Investments Cash outflows related to operating activities excluding upfront payment from Amgen Net Cash Provided By Used In Operating Activities Excluding Upfront Payment Received Capital expenditures Proceeds from upfront payments and equity investments Proceeds From Upfront Payments And Equity Investments Upfront payment. Common stock issued Sale Of Stock Number Of Shares Issued In Transaction Upfront payment Upfront Payment Restricted Cash Restricted Cash And Cash Equivalents Amount insured in FDIC per account Cash F D I C Insured Amount Property, Plant and Equipment, Useful Life Property Plant And Equipment Useful Life Fair value of contingent consideration obligation due to discontinuation of clinical trials Business Combination Contingent Consideration Liability Noncurrent Agreement date. Number of agreements. Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Collaboration and License agreements Collaborative Arrangement [Member] ARO-AMG1 agreement. ARO-AMG1 Agreement A R O A M G1 Agreement [Member] Entity Listings, Exchange Entity Listings Exchange [Axis] Exchange Exchange [Domain] NASDAQ X N A S Collaboration and license agreements. Collaboration and License agreements Collaboration And License Agreement [Member] Investment, Name Schedule Of Equity Method Investment Equity Method Investee Name [Axis] Investment, Name Equity Method Investee Name [Domain] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Agreement date Agreement Date Number of agreements Number Of Agreements Trading period used to calculate weighted average price of common stock listed in stock market. Additional amount of common stock shares agreed to sell upon exercise of option. Trading Period used to calculate share price of common stock surrounding option exercise date. Shares issued Shares Issued Number of trading days, used to calculate weighted average price of Common Stock, listed in stock market Trading Period Used To Calculate Weighted Average Price Of Common Stock Listed In Stock Market Additional amount of common stock shares agreed to sell upon exercise of option Additional Amount Of Common Stock Shares Agreed To Sell Upon Exercise Of Option Number of trading days, used to calculate share price of Common Stock, surrounding option exercise date Trading Period Used To Calculate Share Price Of Common Stock Surrounding Option Exercise Date Cash received as due under collaboration agreement. Option payments, and development, regulatory and sales milestone payments. Cash received as due under collaboration agreement Cash Received As Due Under Collaboration Agreement Option payments, and development, regulatory and sales milestone payments. Option Payments And Development Regulatory And Sales Milestones Payment Deferred revenue Deferred Revenue Deferred revenue amortized into revenue Deferred Revenue Revenue Recognized1 Revenue generated from work orders under services agreement License And Services Revenue Schedule Of Held To Maturity Securities [Table] Schedule Of Held To Maturity Securities [Table] Major Types of Debt and Equity Securities Major Types Of Debt And Equity Securities [Axis] Major Types of Debt and Equity Securities Major Types Of Debt And Equity Securities [Domain] Commercial notes due within one year. Commercial Notes Due Within One Year Commercial Notes Due Within One Year [Member] Schedule Of Held To Maturity Securities [Line Items] Schedule Of Held To Maturity Securities [Line Items] Amortized Cost Gross Unrealized Gains Held To Maturity Securities Accumulated Unrecognized Holding Gain Gross Unrealized Losses Held To Maturity Securities Accumulated Unrecognized Holding Loss Fair Value Held To Maturity Securities Fair Value Research equipment. Computers, office equipment and furniture Furniture And Fixtures Gross Research equipment Research Equipment Software Capitalized Computer Software Gross Leasehold improvements Leasehold Improvements Gross Total gross fixed assets Property Plant And Equipment Gross Less: Accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Finite lived intangible assets amortization expense year six. Finite lived intangible assets amortization expense after year six. Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Asset acquisition. Asset Acquisition Asset Acquisition [Axis] Asset acquisition. Asset Acquisition Asset Acquisition [Domain] Novartis. Novartis Novartis [Member] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Licensing Agreements Licensing Agreements [Member] Patents Patents [Member] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Amortization period of intangible assets Finite Lived Intangible Asset Useful Life Finite-lived intangible assets, accumulated amortization Finite Lived Intangible Assets Accumulated Amortization Amortization expense Amortization Of Intangible Assets Amortization of license agreements remainder of fiscal year 2017 Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year Amortization of license agreements in 2018 Finite Lived Intangible Assets Amortization Expense Year Two Amortization of license agreements in 2019 Finite Lived Intangible Assets Amortization Expense Year Three Amortization of license agreements in 2020 Finite Lived Intangible Assets Amortization Expense Year Four Amortization of license agreements in 2021 Finite Lived Intangible Assets Amortization Expense Year Five Amortization of license agreements in 2022 Finite Lived Intangible Assets Amortization Expense Year Six Amortization of license agreements, thereafter Finite Lived Intangible Assets Amortization Expense After Year Six Intangible Assets Net Excluding Goodwill [Abstract] Intangible assets subject to amortization, beginning balance Intangible assets subject to amortization, Impairment Impairment Of Intangible Assets Finitelived Intangible assets subject to amortization, Amortization Intangible assets subject to amortization, ending balance Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand four equity incentive plan two thousand thirteen equity incentive plan and inducement grants. 2004 Equity Incentive Plan, 2013 Equity Incentive Plan, and Inducement Grants Two Thousand Four Equity Incentive Plan Two Thousand Thirteen Equity Incentive Plan And Inducement Grants [Member] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Series C Preferred Stock Series C Preferred Stock [Member] Series D Junior Participating Preferred Series D Preferred Stock [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Capital stock authorized for issuance Capital Units Authorized Common Stock, Share reserve for issuance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Preferred stock, shares converted Conversion Of Stock Shares Converted1 Common stock, issued upon conversion of preferred stock Convertible Preferred Stock Shares Issued Upon Conversion Rights expiration date. Number of rights distributed for each outstanding share of common stock Class of warrant or right number of rights distribution for each outstanding share common stock. Preferred stock conversion of purchase price per one one thousandth. Preferred stock rights exercisable beneficial ownership percentage of common stock. Dividend distribution, declared date Dividends Payable Date Declared Day Month And Year Number of rights distributed for each outstanding share of common stock Class Of Warrant Or Right Number Of Rights Distribution For Each Outstanding Share Common Stock Dividend distribution, record date Dividends Payable Date Of Record Day Month And Year Preferred stock conversion of purchase price per one one thousandth of share Preferred Stock Conversion Of Purchase Price Per One One Thousandth Beneficial ownership percentage of common stock upon right exercisable Preferred Stock Rights Exercisable Beneficial Ownership Percentage Of Common Stock Rights expiration date Rights Expiration Date Number of rights distributed for each outstanding share of common stock Number Of Rights Distributed For Each Outstanding Share Of Common Stock Common stock shares sold Common stock shares sold, price per share Sale Of Stock Price Per Share Net proceeds received Sale Of Stock Consideration Received On Transaction Remaining life of warrant. Class Of Warrant Or Right [Table] Class Of Warrant Or Right [Table] Class of Warrant or Right Class Of Warrant Or Right [Axis] Class of Warrant or Right Class Of Warrant Or Right [Domain] Warrant one. Warrant 1 Warrant One [Member] Warrant two. Warrant 2 Warrant Two [Member] Warrant three. Warrant 3 Warrant Three [Member] Class Of Warrant Or Right [Line Items] Class Of Warrant Or Right [Line Items] Exercise prices Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 Warrants outstanding Class Of Warrant Or Right Outstanding Remaining Life in Years Remaining Life Of Warrant Lease expiration month and year. Percentage of increase in annual rental cost. Other Commitments [Table] Other Commitments [Table] Property Subject to or Available for Operating Lease Property Subject To Or Available For Operating Lease [Axis] Property Subject to or Available for Operating Lease Property Subject To Or Available For Operating Lease [Domain] Corporate Headquarters in Pasadena Corporate Headquarters In Pasadena Corporate Headquarters In Pasadena [Member] Research facility in Madison. Research Facility in Madison Research Facility In Madison [Member] Research facility in Middleton. Research Facility in Middleton Research Facility In Middleton [Member] Other Commitments Other Commitments [Axis] Other Commitments Other Commitments [Domain] Technology license commitments. Technology License Commitments Technology License Commitments [Member] Other Commitments [Line Items] Other Commitments [Line Items] Office space leases, in square feet Land Subject To Ground Leases Operating lease expiration month and year Lease Expiration Month And Year Rental expense Lease And Rental Expense Percentage of increase in annual rental cost Percentage Of Increase In Annual Rental Cost Primary tenant improvement allowance. Secondary tenant improvement allowance. Lease and rental expense including common area maintenance and real estate taxes and payment of principal and interest. Percentage of increase in annual rental cost excluding principal and interest on note payable. Primary tenant improvement allowance accounted for as deferred rent Primary Tenant Improvement Allowance Secondary tenant improvement allowance accounted for as note payable Secondary Tenant Improvement Allowance Rental expense including common area maintenance and real estate taxes and payments of principal and interest on the note payable Lease And Rental Expense Including Common Area Maintenance And Real Estate Taxes And Payment Of Principal And Interest Percentage of increase in annual rental cost excluding principal and interest on the note payable Percentage Of Increase In Annual Rental Cost Excluding Principal And Interest On Note Payable Other rental expenses. Other rental expenses including common area maintenance and real estate taxes Other Rental Expenses Facility rent expense. Facility rent expense Facility Rent Expense Leases [Abstract] 2017 Operating Leases Future Minimum Payments Remainder Of Fiscal Year 2018 Operating Leases Future Minimum Payments Due In Two Years 2019 Operating Leases Future Minimum Payments Due In Three Years 2020 Operating Leases Future Minimum Payments Due In Four Years 2021 Operating Leases Future Minimum Payments Due In Five Years 2022 and thereafter Operating Leases Future Minimum Payments Due Thereafter Total Operating Leases Future Minimum Payments Due Notes payable amortized term. Promissory note payable commencement date. Promissory note interest rate. Promissory note payable Notes Payable Promissory notes payable amortized term Notes Payable Amortized Term Promissory note commencement date Promissory Note Payable Commencement Date Promissory note interest rate Promissory Note Interest Rate Long Term Notes Payable [Abstract] 2017 Contractual Obligation Future Minimum Payments Due Remainder Of Fiscal Year 2018 Contractual Obligation Due In Second Year 2019 Contractual Obligation Due In Third Year 2020 Contractual Obligation Due In Fourth Year 2021 Contractual Obligation Due In Fifth Year 2022 and thereafter Contractual Obligation Due After Fifth Year Total Contractual Obligation Provision for recorded liabilities Loss Contingency Accrual At Carrying Value Future commitments Purchase Obligation Commitments expected to be incurred in fiscal 2017 Purchase Obligation Future Minimum Payments Remainder Of Fiscal Year Commitments expected to be incurred beyond fiscal 2017 Purchase Obligation Due In Second Year Milestone payments. Milestone payments Milestone Payments Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Two thousands four equity incentive plan. 2004 Equity Incentive Plan Two Thousands Four Equity Incentive Plan [Member] Two thousands thirteen incentive plan. 2013 Incentive Plan Two Thousands Thirteen Incentive Plan [Member] Outside of equity compensation plans. Outside Of Equity Compensation Plans Outside Of Equity Compensation Plans [Member] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Employee Stock Option Employee Stock Option [Member] 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] Shares reserve for issuance Common Stock Capital Shares Reserved For Future Issuance Number of Options Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Number of restricted stock units outstanding Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number Number of Options Outstanding, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Number of restricted stock units outstanding, granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Number of Options Outstanding, beginning balance Number of Options Outstanding, Cancelled Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period Number of Options Outstanding, Exercised Number of Options Outstanding, ending balance Number of Options Outstanding, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted-Average Exercise Price Per Share, beginning balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Cancelled Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Exercised Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, ending balance Weighted-Average Exercise Price Per Share, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted-Average Remaining Contractual Term Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted-Average Remaining Contractual Term, Exercisable 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 Options Outstanding Intrinsic Value Aggregate Intrinsic Value, Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Stock-based compensation expense Grant date fair value of the options granted during the period. Grant date fair value of the options granted Grant Date Fair Value Of Options Granted During Period Intrinsic value of options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Unrecognized pre-tax compensation expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Weighted average period to recognize pre-tax compensation expense 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 Fair Value Assumptions And Methodology [Abstract] Dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate 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 Volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Expected life (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Weighted average grant date fair value per share of options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value RSU awards vesting, description Share Based Compensation Arrangement By Share Based Payment Award Description Number of RSUs, Unvested, beginning of period Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Number of RSUs, Granted Number of RSUs, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Number of RSUs, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Number of RSUs, Unvested, End of period Weighted-Average Grant Date Fair Value, beginning balance 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, 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, Vested 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, 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, ending balance Unrecognized pre-tax compensation expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value Measurements Recurring [Member] Fair Value, Hierarchy Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 Fair Value Inputs Level1 [Member] Level 2 Fair Value Inputs Level2 [Member] 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] Cash and cash equivalents Cash And Cash Equivalents Fair Value Disclosure Short-term investments Warrants issued to acquire common stock. Two thousand twelve warrant. 2012 Warrants Two Thousand Twelve Warrant [Member] Two thousand thirteen warrant. 2013 Warrants Two Thousand Thirteen Warrant [Member] Ablaris Therapeutics. Ablaris Therapeutics Ablaris Therapeutics [Member] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Corporate Bonds Corporate Bond Securities [Member] Warrants issued to acquire Common Stock Warrants Issued To Acquire Common Stock Non-cash gain (loss) from change in fair value of the derivative liability Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings Risk-free interest rate Fair Value Assumptions Risk Free Interest Rate Expected life Fair Value Assumptions Expected Term Dividend yield Fair Value Assumptions Expected Dividend Rate Volatility Fair Value Assumptions Expected Volatility Rate Value, Beginning balance Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value Issuance of instruments Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues Change in value Net settlements Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements Value, Ending balance Term of exchange rights. Exchange right convertible conversion ratio. Number of exchange right are sold. Duration of exchange rights Term Of Exchange Rights Exchange right convertible conversion ratio Exchange Right Convertible Conversion Ratio Number of exchange right sold Number Of Exchange Right Are Sold