Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable Current Accounts payable Accretion Amortization Of Discounts And Premiums Investments Amortization of premiums on investments Accrued Liabilities Current Accrued liabilities Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive (loss) gain Additional Paid In Capital Additional paid-in capital 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: Allocated Share Based Compensation Expense Share-based compensation expense Total share-based compensation expense Amendment Flag Amendment Flag Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Shares of common stock excluded from computation of diluted earnings per share outstanding Assets Total assets Assets [Abstract] ASSETS Assets Current Total current assets Assets Current [Abstract] Current assets: Assets Fair Value Disclosure Recurring Fair value of assets on recurring basis Available For Sale Securities Aggregate Estimated Fair Value Investments 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 Amortized Cost Amortized Cost Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Accumulated Loss 12 Months or Greater, Unrealized Losses Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss Total Unrealized Losses Available For Sale Securities Continuous Unrealized Loss Position Fair Value Total Estimated Fair Value Available For Sale Securities Continuous Unrealized Loss Position Fair Value Table [Text Block] Available-For-Sale Investments in Unrealized Loss Position Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Accumulated Loss Less Than 12 Months, Unrealized Losses Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Less Than 12 Months, Estimated Fair Value Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value 12 Months or Greater, Estimated Fair Value Available for Sale Securities Contractual Maturity Available For Sale Securities Contractual Maturity Available for sale securities contractual maturity Available For Sale Securities [Text Block] Summary of Investments Classified as Available-For-Sale Securities Award Type [Axis] Award Type [Axis] Basis Of Accounting Policy Policy [Text Block] Basis of Presentation Business Description And Accounting Policies [Text Block] ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES Business Description Policy [Text Block] Business Description Policy [Text Block] Description of Business Cash And Cash Equivalents At Carrying Value Cash and cash equivalents at end of the period Cash and cash equivalents at beginning of the period Cash and cash equivalents Cash And Cash Equivalents [Member] Cash and Cash Equivalents Cash And Cash Equivalents Period Increase Decrease Net decrease in cash and cash equivalents Aggregate charges incurred in connection with exit or disposal activity (including executory costs such as maintenance charges) net of estimated income from potential subleasing. Cease Use Expense Cease-use expense Amount of liability recorded for the net present value estimated difference between 1) the income to be generated under the Sublease and future subleases, and 2) the Lease obligation over the remaining term of the Lease for the space that is occupied by the subtenant. Cease Use Liability Ending balance Beginning balance Amount consists principally of the value of lease obligations incurred in connection with an exit or disposal activity (including executory costs such as maintenance charges) net of estimated income from potential subleasing, through the balance sheet date and due to be paid within one operating cycle of the balance sheet date. Cease Use Liability Current Current portion of cease-use liability Amount consists principally of the value of lease obligations incurred in connection with an exit or disposal activity (including executory costs such as maintenance charges) net of estimated income from potential subleasing, through the balance sheet date and due to be paid more than one operating cycle after the balance sheet date. Cease Use Liability Noncurrent Cease-use liability Payments during the period associated with the Cease-use Liability. Cease Use Liability Payment Payments Certificates Of Deposit [Member] Certificates of deposit Class Of Stock [Line Items] Class of Stock [Line Items] Commercial Paper [Member] Commercial paper Commitments And Contingencies Commitments and contingencies Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] 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 Common stock, shares outstanding Common Stock Value Common stock, $0.001 par value; 110,000,000 shares authorized; issued and outstanding shares were 75,919,009 as of June 30, 2014 and 67,351,195 as of December 31, 2013 Comprehensive Income Net Of Tax Comprehensive loss Corporate Bond Securities [Member] Corporate bonds Corporate Debt Securities [Member] Corporate debt securities Current Fiscal Year End Date Current Fiscal Year End Date Recognized amortization of deferred gain on real estate. Deferred Gain On Sale Of Real Estate Deferred gain on real estate The current portion of deferred gains on the sale of real estate. Deferred Gain On Sale Of Real Estate Current Current portion of deferred gain on sale of real estate The noncurrent portion of deferred gains on the sale of real estate. Deferred Gain On Sale Of Real Estate Noncurrent Deferred gain on sale of real estate Deferred Rent Credit Current Current portion of deferred rent Deferred Rent Credit Noncurrent Deferred rent Deferred Rent Reversed Deferred Rent Reversed Deferred rent reversed Depreciation And Amortization Depreciation and amortization Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] SHARE-BASED COMPENSATION Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Change in contractual life when stock option plan was amended/adopted. Due To Changes In Plan [Member] Due to Changes in the Plan Earnings Per Share [Abstract] Net loss per common share: Earnings Per Share Basic And Diluted Basic and diluted Earnings Per Share [Text Block] LOSS PER COMMON SHARE Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] 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 1 Unrecognized compensation cost, weighted average period of recognition Employee Stock Option [Member] Stock Options Entity Central Index Key Entity Central Index Key Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Issuance Per Share Amount Common stock, offering price Equity Units Aggregate Offering Price Equity Units Aggregate Offering Price Aggregate initial offering price of common stock 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] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Assets Measured On Recurring Basis [Text Block] Assets Measured at Fair Value on Recurring Basis Fair Value By Fair Value Hierarchy Level [Axis] Fair Value, Hierarchy [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS Fair Value Inputs Level 1 [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value Inputs Level 2 [Member] Significant Other Observable Inputs (Level 2) Fair Value Inputs Level 3 [Member] Significant Unobservable Inputs (Level 3) Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Gain Loss On Disposition Of Assets Gain (loss) on sale/disposal of assets Gains Losses On Sales Of Assets Gain on sale of assets General And Administrative Expense General and administrative General And Administrative Expense [Member] General and Administrative Expense Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Increase Decrease In Accounts Payable And Accrued Liabilities Accounts payable and accrued liabilities Increase Decrease In Accounts Receivable And Other Operating Assets Receivables under collaboration agreements and other assets Increase (decrease) in cease-use liability during the period. Increase Decrease In Cease Use Liability Cease-use liability Increase Decrease In Deferred Liabilities Deferred rent Increase Decrease In Deferred Revenue Deferred revenues Increase Decrease In Operating Capital [Abstract] Change in operating assets and liabilities: Increase Decrease In Restricted Cash Deposits and restricted cash Investment Income Net Investment income, net Investments Carrying Value Investments Debt And Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments including cash equivalents and restricted cash. Investments Including Cash Equivalents And Restricted Cash [Member] Investments Including Cash Equivalents And Restricted Cash Investments Schedule [Abstract] Investments Schedule [Abstract] Investment Table [Text Block] Investments Investment [Text Block] INVESTMENTS Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Member] Investments [Domain] Lease Expiration Year Lease Expiration Year Lease expiration year Lease Extension Period Lease Extension Period Lease extension period Leases [Abstract] Leases [Abstract] Legal Entity [Axis] Legal Entity [Axis] Letter of credit issued by the bank in lieu of a cash security deposit under the terms of a lease, secured by a deposit of equal amount with that bank. Letters Of Credit Collateral Letter of credit Liabilities Total liabilities Liabilities And Stockholders Equity Total liabilities and stockholders' equity Liabilities And Stockholders Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities Current Total current liabilities Liabilities Current [Abstract] Current liabilities: Licenses Revenue License fees Long Term Investments Long-term investments, available for sale Long Term Investments Long Term Investments [Member] Long-term investments Maximum [Member] Maximum Minimum [Member] Minimum Money Market Funds [Member] Cash and money market funds Mortgage Loans On Real Estate Cost Of Mortgages Sold Mortgage debt retired Net Cash Provided By Used In Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities Continuing Operations Net cash provided by financing activities Net Cash Provided By Used In Investing Activities [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided By Used In Investing Activities Continuing Operations Net cash used in investing activities Net Cash Provided By Used In Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided By Used In Operating Activities Continuing Operations Net cash used in operating activities Net Income Loss Net loss Net loss New Accounting Pronouncements Policy Policy [Text Block] Impact of Recently Issued Accounting Standards Nonoperating Income Expense Total other income Nonoperating Income Expense [Abstract] Other income: Number Of Buildings Leased Number Of Buildings Leased Number of building leased Number Of Renewal Options Number Of Renewal Options Number of times to renew the lease contract Operating Expenses Total operating expenses Operating Expenses [Abstract] Operating expenses: Operating Income Loss Loss from operations Operating Leases Rent Expense Sublease Rentals 1 Rental income from sublease agreement Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Other comprehensive loss: Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Net unrealized gains (losses) on available-for-sale securities Other Liabilities Noncurrent Other liabilities Other Nonoperating Income Expense Other income, net Payments To Acquire Investments Purchases of investments Payments To Acquire Property Plant And Equipment Purchases of property and equipment Performance Based Restricted Stock Unit [Member] Performance Based Restricted Stock Unit [Member] Performance-based RSUs Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 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 Preferred Stock Value Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding Proceeds From Issuance Of Common Stock Issuance of common stock Proceeds from common stock issuance Proceeds From Sale And Maturity Of Marketable Securities Sales and maturities of investments Proceeds From Sale Of Property Plant And Equipment Proceeds from sales of property and equipment Proceeds From Stock Options Exercised Cash received from stock option exercises Property Management Fee Percent Fee Percentage of management fee included in the base annual rent Property Plant And Equipment Net Property and equipment, net Range [Axis] Range [Axis] Range [Member] Range [Domain] Real Estate Properties Base Purchase Price [Abstract] Real Estate Properties Base Purchase Price [Abstract] Real Estate Properties Base Purchase Price [Abstract] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Receivables Net Current Receivables under collaboration agreements and other current assets Renewal Extended Terms Additional Period Renewal Extended Terms Additional Period Lease renewal extended additional periods The length of time a renewal option maybe opted for under a sublease. Renewal Option Terms Additional Period Lease renewal additional periods Research And Development [Abstract] Research and Development [Abstract] Research And Development Expense Research and development Research And Development Expense [Member] Research and Development Expense Research Development And Computer Software Disclosure [Text Block] RESEARCH AND DEVELOPMENT Restricted Cash And Cash Equivalents Noncurrent Restricted cash Restricted Stock Units R S U [Member] Restricted Stock Units (RSUs) Retained Earnings Accumulated Deficit Accumulated deficit Revenues Total revenues Revenues [Abstract] Revenues: Sale Leaseback Transaction Current Period Gain Recognized Deferred gain recognized on real estate sale Sale Leaseback Transaction Deferred Gain Net Net deferred gain on real estate sale Sale Leaseback Transaction Disclosure [Text Block] REAL ESTATE Sale Leaseback Transaction Gross Proceeds Investing Activities Sale of facility and associated real property Sale Leaseback Transaction, Lease Period Sale Leaseback Transaction Lease Period Leaseback transaction lease period Sale Leaseback Transaction Net Proceeds Financing Activities Cash received net of transaction costs and debt retirement Scenario Previously Reported [Member] Scenario, Previously Reported Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Schedule Of Accrued Liabilities Table [Text Block] Changes to Accrued Cease-Use Liability Schedule Of Available For Sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items]