Document and Entity Information. Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Condensed Balance Sheet [Abstract] Assets [Abstract] Current Assets: Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents - end of period Cash and Cash Equivalents - beginning of period Cash and cash equivalents Available-for-sale Securities, Current Marketable securities (note 3) Prepaid Expense and Other Assets Prepaid expenses and other current assets (note 4) Assets, Current Total Current Assets Restricted Cash and Cash Equivalents, Noncurrent Restricted Cash Equivalents (note 14) Property, Plant and Equipment, Net Equipment, Net (note 5) Net carrying amount Assets Total Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities [Abstract] Current Liabilities: Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued expenses (note 6) The unexpensed portion of deferred research and development arrangement as of the balance sheet date. Deferred research and development arrangement is a liability related to a collaborative research agreement. Generally, an entity records deferred research and development arrangement when it receives consideration from a collaborator, and expenses the contribution over a period of time. Deferred Research and Development Arrangement Deferred Research and Development Arrangements (note 7) Deferred Rent Credit, Noncurrent Other Liabilities (note 8) Fair values as of the balance sheet date of all liabilities resulting from warrants that meet the criteria of being accounted for as liability instruments due to a provision in the warrant agreement for net cash settlement in the event that there is a fundamental transaction (contractually defined as a merger, sale of substantially all assets, tender offer, or share exchange). Warrant Liabilities Warrant Liabilities (note 12) Liabilities Total Liabilities Commitments and Contingencies (note 18) Commitments and Contingencies (note 14) Statement of Stockholders' Equity (Deficit) and Comprehensive Loss Period from March 19, 2001 (Inception) to December 31, 2011 Stockholders' Equity (note 10): Preferred Stock, Value, Issued Preferred stock, par value $0.0001, 100,000,000 authorized shares, none issued and outstanding Common Stock, Value, Issued Common stock, par value $0.0001, 500,000,000 authorized shares, 178,266,533 and 146,732,000 issued and 178,153,318 and 146,717,795 outstanding Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated deficit Treasury Stock, Value Treasury stock, 113,215 and 14,205 shares, at cost Stockholders' Equity Attributable to Parent Total Stockholders' Equity Liabilities and Stockholders' Equity (abstract) Total Liabilities and Stockholders' Equity Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Outstanding Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Outstanding Treasury Stock, Shares Condensed Statement Of Operations Revenues: Revenues Research Expenses: General and Administrative Expense General and administrative Research and Development Expense Research and development License Costs Patent fees Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Operating Expenses Total Expenses Operating Income (Loss) Loss from Operations Other (Income) Expense Other Income (Expense) Investment Income, Interest Interest income The net change during the reporting period in the fair value of warrant liabilities. Unrealized loss on fair value of warrants Unrealized gain/(loss) on fair value of warrants Unrealized loss on fair value of warrants Debt Related Commitment Fees and Debt Issuance Costs Financing expense Financing expense Other Nonoperating Income (Expense) Total Other Income (Expense) Income (Loss) from Continuing Operations Before Income Taxes, Domestic Income (Loss) Before Provision for Income Taxes Income Tax Expense (Benefit) Provision for income taxes Net Income (Loss) Attributable to Parent Net loss Net Income (Loss) Income (Loss) from Continuing Operations, Per Basic Share Net income (loss) per share, basic and diluted Weighted average number of common shares outstanding, basic and diluted Weighted average number of shares outstanding, basic and diluted Condensed Statement 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: Issuance of Stock and Warrants for Services or Claims Compensatory stock Share-based Compensation Stock-based compensation Amount of previously reported deferred research and development contribution that was recognized as expense during the period. Generally, an entity records deferred research and development contribution when it receives consideration from a collaborator, and expenses the contribution over a period of time. Amortization of Deferred Research and Development Contribution Amortization of deferred research and development arrangements The total amount of amortization expense recognized during the period on a deferred lease incentive. The deferred lease incentive originated from a spending allowance for leasehold improvements and other fixed assets related to the building being leased. Amortization of deferred lease incentive The amount of rent expense recognized during the reporting period using the straight line method. Deferred lease expenses Deferred lease expenses Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Prepaid, Deferred Expense, and Other Assets Prepaid expenses and other current assets Increase (Decrease) In Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net Cash Used in Operating Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash Flows from Investing Activities: The net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use and are associated with underlying transactions that are classified as operating activities. Increase (Decrease) in Restricted Cash Equivalents Restricted cash equivalents Payments to Acquire Machinery and Equipment Purchase of equipment Net Cash Provided by (Used in) Investing Activities Net Cash Provided by Investing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash Flows from Financing Activities: Proceeds from Issuance or Sale of Equity Issuance of common stock and units, net of issuance costs Proceeds from Stock Options Exercised Proceeds from exercise of stock options Proceeds from Warrant Exercises Proceeds from exercise of stock warrants 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 Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash financing and investing activties: The fair value of common stock warrants issued during the period. Warrants issued The non-cash reduction of the recognized warrant liability on the balance sheet during the reporting period. The value is derived from the fair value of the warrants at the exercise date. Warrant liability extinguishment from exercise of warrants Shares Surrendered Shares Surrendered Shares withheld for net stock option exercise Operations And Organization [Abstract] Nature of Operations [Text Block] Operations and Organization Recent Accounting Pronouncements Affecting The Company [Abstract] Basis of Presentation and Significant Accounting Policies [Text Block] Recent Accounting Pronouncements Affecting The Company Marketable Securities [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Marketable Securities Prepaid Expenses and Other Current Assets [Abstract] The entire note disclosure regarding the Company's prepaid expenses and other current assets. These assets are primarily deposits on contracts but also includes other prepaid expenses such as rent, insurance, and investor relations services. Prepaid Expenses and Other Current Assets [Text block] Prepaid Expenses and Other Current Assets Equipment, Net [Abstract] Property, Plant and Equipment [Text Block] Equipment, Net Accounts Payable And Accrued Expenses [Abstract] Accounts Payable and Accrued Liabilities Disclosure Accounts Payable And Accrued Expenses Deferred Research and Development Arrangement Deferred Research And Development Arrangement [Abstract] The entire disclosure for deferred research and development arrangement at the end of the reporting period, and descriptions and amounts of the significant changes that occurred during the reporting period. Deferred Research and Development Arrangement is a liability as of the balance sheet date related to a collaborative research agreement. Generally, an entity records deferred research and development arrangement when it receives consideration from a collaborator, and expenses the contribution over a period of time. Deferred Research and Development Arrangement [Text Block] Deferred Research And Development Arrangement Other Liabilities [Abstract] Other Liabilities Disclosure [Text Block] Other Liabilities Net Loss Per Common Share [Abstract] Earnings Per Share [Text Block] Net Loss per Common Share Common Stock [Abstract] Schedule of Stock by Class [Text Block] Common Stock Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Warrants [Abstract] Disclosure for warrants or rights issued. The Company's outstanding warrants and rights are non-derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. Warrants [Text Block] Warrants Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Fair Value Measurements [Abstract] Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Text Block] Fair Value Measurements Available-for-sale Securities [Table Text Block] Schedule Of Cost And Fair Value Of Marketable Securities Marketable Securities [Text Block] Schedule Of Cost And Fair Value By Contractual Maturity Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule Of Prepaid Expenses And Other Current Assets Property, Plant and Equipment [Table Text Block] Schedule Of Equipment, Net Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule Of Accounts Payable And Accrued Expenses Schedule Of Deferred Lease Incentive [Table Text Block] Schedule Of Deferred Lease Incentive [Table Text Block] Schedule Of Deferred Lease Incentive Warrant Issuance [Axis] Warrant Issuance [Axis] Warrant Issuance [Domain] Warrant Issuance [Domain] Warrant Issuance [Domain] January 21, 2014 Financing January212014 Financing [Member] January 21, 2014 Financing [Member] Summary Of Allocation Of Proceeds From Offering [Table Text Block] Summary Of Allocation Of Proceeds From Offering [Table Text Block] Summary Of Allocation Of Proceeds From Offering Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Summary Of Stock Compensation Expense Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule Of Assumptions Made In Calculating The Fair Value Of Options Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary Of Employee And Non-Employee Transactions Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] Summary Of Stock Options Outstanding Schedule of Nonvested Share Activity [Table Text Block] Summary Of Unvested Shares Summary Of Changes In Warrants Outstanding During The Period [Table Text Block] Summary Of Changes In Warrants Outstanding During The Period [Table Text Block] Summary Of Changes In Warrants Outstanding During The Period Schedule Of Fair Value Of Warrants Issued [Table Text Block] Schedule Of Fair Value Of Warrants Issued [Table Text Block] Schedule Of Fair Value Of Warrants Issued Summary Of Shares Indexed To The Warrants [Table Text Block] Summary Of Shares Indexed To The Warrants [Table Text Block] Summary Of Shares Indexed To The Warrants Schedule Of Assumptions Used In Calculating Fair Value Of Warrants [Table Text Block] Schedule Of Assumptions Used In Calculating Fair Value Of Warrants [Table Text Block] Schedule Of Assumptions Used In Calculating Fair Value Of Warrants Schedule Of Unrealized Gains Losses On Fair Value OF Warrants[Table Text Block] Schedule Of Unrealized Gains Losses On Fair Value OF Warrants [Table Text Block] Schedule Of Unrealized Gain/(Loss) On Fair Value Of Warrants Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule Of Deferred Tax Assets And Valuation Allowance Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule Of Future Rental Payments Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Reconciliation Of Changes In The Fair Value Of Liabilities Available-for-sale Securities, Amortized Cost Basis Cost Basis, Securities available-for-sale Available-for-sale Securities Available-for-sale Securities, Total Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Cost Basis, Maturity Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Fair Value, Maturity Other Prepaid Expense, Current Deposits on contracts Other Assets, Current Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Total prepaid expenses and other current assets Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Furniture And Fixtures [Member] Furniture and fixtures [Member] Office Equipment [Member] Office equipment [Member] Long-lived, depreciable assets that are used in the creation, maintenance and utilization of information systems as well as laboratory equipment. Lab And Computer Equipment [Member] Lab and computer equipment [Member] Leasehold Improvements [Member] Leasehold improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Gross Total fixed assets Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation and amortization Depreciation Depreciation and amortization expense Accounts Payable, Trade Trade payables Accrued Liabilities Accrued expenses Other Accrued Liabilities Accrued research and development contract costs Employee-related Liabilities Payroll liabilities Accounts Payable and Accrued Liabilities Total accounts payable and accrued expenses Schedule of Research and Development Arrangement, Contract to Perform for Others [Table] Research and Development Arrangement, Contract to Perform for Others [Line Items] Research and Development Arrangement, Contract to Perform for Others, Compensation Earned Research and development arrangement, one-time fee Research And Developement Agreement Period Expense Reduction Amount Research And Developement Agreement Period Expense Reduction Amount Reduction of research and development expenses Research And Developement Agreement Period Research And Developement Agreement Period research and development period Research And Developement Agreement Royalty Percentage Of Net Sales Research And Developement Agreement Royalty Percentage Of Net Sales Royalties paid, percentage of net sales Lease Term Lease Term Office lease term Incentive from Lessor Deferred lease incentive Additions to the incentive from lessor liability during the period. Incentive from Lessor, Additions Accrued Rent Accumualted Amortization Of Incentive From Lessor Accumualted Amortization Of Incentive From Lessor Less accumulated amortization Incentive From Lessor Net Incentive From Lessor Net Balance Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potentially dilutive securities Schedule of Stock by Class [Table] Class of Stock [Line Items] Stock Issued During Period, Shares, New Issues Shares issued Stock Issued During Period, Value, Issued for Cash Value of shares issued Payments of Stock Issuance Costs Stock Issued During Period, Value, Stock Options Exercised Value of exercised of stock options Shares Paid for Stock Option Exercises Shares Paid for Stock Option Exercises Shares paid for stock options exercised Shares Issued For Options Exercised Shares Issued For Options Exercised Shares issued for options exercised Equity Issuance, Per Share Amount Issuance price per share Proceeds from Issuance of Common Stock Proceeds from issuance Gross Proceeds: Investment Warrants, Issued, Number Investment Warrants, Issued, Number Number of warrants, Issued Proceeds From Issuance Of Common Stock Allocated To Expense Proceeds From Issuance Of Common Stock Allocated To Expense Proceeds allocated to financing expense Common Stock Issuance Cost Incurred Common Stock Issuance Cost Incurred Issuance cost incurred Cash Paid For Warrants Exercised Cash Paid For Warrants Exercised Cash paid for warrants exercised Shares Issued For Warrants Exercised Shares Issued For Warrants Exercised Shares issued for warrants exercised Warrants issued per share of stock issued in unit offering Warrants issued per share of stock issued in unit offering Share Price The exercise price of stock warrants at the date of exercise. Stock Warrants, Exercise Price Stock Issued During Period, Shares, Issued for Services Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of options, Exercised Numberof options, Exercised Proceeds From Issuance Of Common Stock Allocated To Warrant Liabilities Proceeds From Issuance Of Common Stock Allocated To Warrant Liabilities Allocated to Warrant liabilities Proceeds From Issuance Of Common Stock Allocated To Equity Proceeds From Issuance Of Common Stock Allocated To Equity Allocated to Common stock and additional paid-in capital Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Accounting For Share-Based Compensation [Axis] Accounting For Share-Based Compensation [Axis] Accounting For Share-Based Compensation [Domain] Accounting For Share Based Compensation [Domain] Accounting For Share-Based Compensation [Domain] Employee Transaction [Member] Employee Transaction [Member] Employee Transaction [Member] Non-Employee Transaction [Member] Non Employee Transaction [Member] Non-Employee Transaction [Member] Exercise Price Range [Axis] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Exercise Price $0.31 [Member] Exercise Price031 [Member] Exercise Price $0.31 [Member] Exercise Price $0.37 [Member] Exercise Price037 [Member] Exercise Price $0.37 [Member] Exercise Price $0.90 [Member] Exercise Price090 [Member] Exercise Price $0.90 [Member] Exercise Price $0.98 [Member] Exercise Price098 [Member] Exercise Price $0.98 [Member] Exercise Price $1.14 [Member] Exercise Price114 [Member] Exercise Price $1.14 [Member] Exercise Price $1.35 [Member] Exercise Price135 [Member] Exercise Price $1.35 [Member] Exercise Price $0.39 [Member] Exercise Price039 [Member] Exercise Price $0.39 [Member] Exercise Price $0.50 [Member] Exercise Price050 [Member] Exercise Price $0.50 [Member] Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Vesting Period [Axis] Vesting Period [Axis] Vesting Period [Domain] Vesting Period [Domain] Vesting Period [Domain] First Anniversary [Member] First Anniversary [Member] First Anniversary [Member] Second Anniversary [Member] Second Anniversary [Member] Second Anniversary [Member] Third Anniversary [Member] Third Anniversary [Member] Third Anniversary [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Percentage Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Percentage Vesting percentage Share Based Compensation Arrangement By Share Based Payment Award Expiration Date Range Share Based Compensation Arrangement By Share Based Payment Award Expiration Date Range Expiration of options from grant date, years Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Non-employee vesting period Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Options authorized for issuance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of options, Oustanding Number of options, Oustanding Number of options, Oustanding Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Allocated Share-based Compensation Expense Share Based Compensation Share-based employee compensation expense Other Tax Expense (Benefit) Income tax benefit from share-based compensation Percentage of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Deferred Tax Assets Valuation Allowance Percentage Valuation allowance on deferred tax assets Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options granted Number of options, Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Stock option exercise price Weighted average exercise price, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Fair Value Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Fair Value Stock option grants fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Intrinsic value of options exercised The weighted average fair value of awards vested during the period on option plans. Share Based Compensation Arrangement By Share Based Payment Award Options Vested, Weighted Average Grant Date Fair Value Weighted average fair value at grant date, Vested Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Weighted average vesting period, years Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] General and administrative, Payroll [Member] General And Administrative Payroll [Member] General and administrative, Payroll [Member] General and administrative, Consulting and other professional fees [Member] General And Administrative Consulting And Other Professional Fees [Member] General and administrative, Consulting and other professional fees [Member] Research and development, Payroll [Member] Research And Development Payroll [Member] Research and development, Payroll [Member] Research and development, Consulting and other professional fees [Member] Research And Development Consulting And Other Professional Fees [Member] Research and development, Consulting and other professional fees [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, Outstanding Weighted average exercise price, Outstanding Weighted average exercise price, Outstanding Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Number of options, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted average exercise price, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average remaining contractual term, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate intrinsic value, Exercisable Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Type of Deferred Compensation [Axis] Deferred Bonus And Profit Sharing Arrangement Individual Contract Type Of Deferred Compensation [Domain] Type of Deferred Compensation, All Types [Domain] Nonvested Options [Member] Nonvested Options [Member] Nonvested Options [Member] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] The number of nonvested options as of the balance sheet date. Number of nonvested options, outstanding Number of nonvested options, outstanding Number of nonvested options, outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of options, Granted Gross number of share options (or share units) vested during the period. Share-Based Compensation Arragement by Share-Based Payment Award, Options, Vested in Period, Gross Number of options, Vested The weighted average fair value of nonvested awards on option plans for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Weighted Average Grant Date Fair Value Weighted average fair value at grant date, Unvested Weighted average fair value at grant date, Unvested The weighted average fair value of nonvested awards on option plans as of the grant date. Share Based Compensation Arrangement By Share Based Payment Award Options Granted Weighted Average Grant Date Fair Value Weighted average fair value at grant date, Granted Class of Warrant or Right [Table] Class of Warrant or Right [Line Items] Class of Warrant or Right, Outstanding Number of warrants, Outstanding Number of warrants, Outstanding Number of warrants, Outstanding Investment Warrants, Exercise Price Weigted average exercise price, Outstanding Weigted average exercise price, Outstanding Exercise price Investment Warrants Expiration Date Range Start Warrant expiration date, start Investment Warrants Expiration Date Range End Warrant expiration date, end Investment Warrants Weighted Average Remaining Contractual Term Investment Warrants Weighted Average Remaining Contractual Term Average remaining contractual life of warrants outstanding Probability Of Entering Into A Fundamental Transaction Probability Of Entering Into A Fundamental Transaction Probability of entering into a fundamental transaction Investment Warrants, Issued, Weighted Average Exercise Price Investment Warrants, Issued, Weighted Average Exercise Price Weighted average exercise price, Issued Investment Warrants, Exercised, Number Investment Warrants, Exercised, Number Number of warrants, Exercised Investment Warrants, Exercised, Weighted Average Exercise Price Investment Warrants, Exercised, Weighted Average Exercise Price Weighted average exercise price, Exercised Investment Warrants, Expired, Number Investment Warrants, Expired, Number Number of warrants, Expired Investment Warrants, Expired, Weighted Average Exercise Price Investment Warrants, Expired, Weighted Average Exercise Price Weighted average exercise price, Expired Class Of Warrant [Axis] Class Of Warrant [Axis] Class Of Warrant [Domain] Class Of Warrant [Domain] Class Of Warrant [Domain] Series III Warrants [Member] Series Iii Warrants [Member] Series III Warrants [Member] Warrants To Institutional Investors [Member] Warrants To Institutional Investors [Member] Warrants To Institutional Investors [Member] Warrants To Placement Agent [Member] Warrants To Placement Agent [Member] Warrants To Placement Agent [Member] June Fifth Two Thousand Nine Financing [Member] June Fifth Two Thousand Nine Financing [Member] June 5, 2009 Financing [Member] October Twenty Third Two Thousand Nine Financing [Member] October Twenty Third Two Thousand Nine Financing [Member] October 23, 2009 Financing [Member] June Thirtieth Two Thousand Ten Financing [Member] June Thirtieth Two Thousand Ten Financing [Member] June 30, 2010 Financing [Member] March Thirty First Two Thousand Eleven Financing [Member] March Thirty First Two Thousand Eleven Financing [Member] March 31, 2011 Financing [Member] December Fourth Two Thousand Twelve Financing [Member] December Fourth Two Thousand Twelve Financing [Member] December 4, 2012 Financing [Member] Investment Warrants, Fair Value Investment Warrants, Fair Value Fair value Investment Warrants, Number Of Shares Indexed Investment Warrants, Number Of Shares Indexed Number of shares indexed Investment Warrants, Fair Value Assumptions, Trading Market Prices Investment Warrants, Fair Value Assumptions, Trading Market Prices Trading market prices Investment Warrants Fair Value Assumptions Estimated Future Volatility Rate Investment Warrants Fair Value Assumptions Estimated Future Volatility Rate Estimated future volatility Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Minimum Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Minimum Estimated future risk-free rate, minimum Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate Estimated future risk-free rate Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Maximum Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Maximum Estimated future risk-free rate, maximum Investment Warrants, Fair Value Assumptions, Equivalent Volatility, Minimum Investment Warrants, Fair Value Assumptions, Equivalent Volatility, Minimum Equivalent volatility, minimum Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate Equivalent volatility Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate, Maximum Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate, Maximum Equivalent volatility, maximum Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Minimum Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Minimum Equivalent risk-free rate, minimum Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate Equivalent risk-free rate Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Maximum Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Maximum Equivalent risk-free rate, maximum Operating Loss Carryforwards Operating loss carry-forward Operating Loss Carryforwards, Expiration Dates Net operating loss carry-forwards expiration Deferred Tax Assets, Operating Loss Carryforwards Net Operating Loss Carryforwards Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock Compensation Expense Deferred Tax Assets Book Tax Differences On Assets And Liabilities Deferred Tax Assets Book Tax Differences On Assets And Liabilities Book tax differences on assets and liabilities Deferred Tax Assets, Valuation Allowance Valuation Allowance Deferred Tax Assets, Net of Valuation Allowance Net Deferred Tax Assets Commitments And Contingencies [Table] Commitments And Contingencies [Table] Leased Property [Axis] Leased Property [Axis] Leased Property [Domain] Leased Property [Domain] Leased Property [Domain] Lab Space Rental [Member] Lab Space Rental [Member] Lab Space Rental [Member] Office Space Rental [Member] Office Space Rental [Member] Office Space Rental [Member] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Research And Developement Arragement Contract To Perform For Others, Term Research And Developement Arragement Contract To Perform For Others, Term Contract term, months Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross Total estimated costs incurred to provide research and development services Research And Development Arrangement Contract To Perform For Others Payments Made Research And Development Arrangement Contract To Perform For Others Payments Made Amount paid to provide research and development services Lease, Area Lease, Area Office space Research And Developement Agreement One Time Milestone Payment Research And Developement Agreement One Time Milestone Payment One-time milestone payment Operating Leases, Rent Expense, Net Rent expense, current Letter Of Credit Issued Letter Of Credit Issued Letter of credit issued to lessor Research And Development Agreement Proceeds Promised For Use On Specific Project Research And Development Agreement Proceeds Promised For Use On Specific Project Proceeds promised to fund research and developement program Balance as of the date specified of unused RELO funds to be used to pay for unbilled expenses or returned. Research and Development Funds, Balance to Repay Defined Contribution Plan, Employer Matching Contribution Defined Contribution Plan, Employer Matching Contribution Employer matching contribution Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent Maximum percentage of employee's gross pay Defined Contribution Plan Maximum Annual Contribution Per Employee Additional Percent On Deferral Defined Contribution Plan Maximum Annual Contribution Per Employee Additional Percent On Deferral Employer matching contribution on deferral Defined Contribution Plan, Employer Matching Contribution, Percent Percentage of employee's gross pay Defined Contribution Plan, Cost Recognized Expense related to matching contribution Montly Rental Committment Montly Rental Committment Montly rental committment Laboratory Space, Renewal Term Laboratory Space, Renewal Term Laboratory renewal term Operating Leases, Future Minimum Payments Due, Next Twelve Months 2014 Operating Leases, Future Minimum Payments, Due in Two Years 2015 Operating Leases, Future Minimum Payments, Due in Three Years 2016 Operating Leases, Future Minimum Payments, Due in Four Years 2017 Operating Leases, Future Minimum Payments, Due in Five Years 2018 Operating Leases, Future Minimum Payments, Due Thereafter 2019 Operating Leases, Future Minimum Payments Due Total Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 [Member] Fair Value Inputs Level2 [Member] Level 2 [Member] Fair Value Inputs Level3 [Member] Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Restricted Cash And Cash Equivalents Fair Value Disclosure Restricted Cash And Cash Equivalents Fair Value Disclosure Restricted Cash equivalents Investments, Fair Value Disclosure Marketable Securities Assets, Fair Value Disclosure Total Assets: Warrant Liabilities Fair Value Disclosure Warrant Liabilities Fair Value Disclosure Warrant Liabilities Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value by Liability Class [Domain] Warrant Liabilities [Member] Warrant Liabilities [Member] Warrant Liabilities [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Balance at June 30 Balance at January 1 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Additions Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Unrealized Losses Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Unrealized Losses Unrealized losses, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Transfers out of level 3 Counterparty Name [Axis] Repurchase Agreement Counterparty Name [Domain] Counterparty Name [Domain] Rexgene [Member] Rexgene [Member] Rexgene [Member] Teva Pharmaceutical Industries, Ltd. [Member] Teva Pharmaceutical Industries Ltd [Member] Teva Pharmaceutical Industries, Ltd. [Member] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Information related to the 2013 stock option plan. The2013 Plan [Member] The 2013 Plan [Member] Information related to the 2003 stock option plan. The2003 Plan [Member] The 2003 Plan [Member] July 26, 2013 Financing [Member] July262013 Financing [Member] July 26, 2013 Financing [Member] October 16, 2013 Financing. October Sixteenth Two Thousand Thirteen Financing [Member] October 16, 2013 Financing [Member] Exercised and Expired Warrants [Member] Exercised And Expired Warrants [Member] Exercised and Expired Warrants [Member] Statement, Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Scenario Forecast [Member] Scenario, Forecast [Member]