Entity Central Index Key Restricted cash fair value disclosure. Debt instrument convertible gross carrying amount of the equity component. Cover [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 Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report 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 Short-term investments Available For Sale Securities Debt Securities Current Accounts receivable — net of allowance for doubtful accounts of $2,525 and $1,584 at September 30, 2020 and December 31, 2019, respectively Accounts Receivable Net Current Deferred commission expense Deferred Costs Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Long-term investments Available For Sale Securities Debt Securities Noncurrent Property and equipment, net Property Plant And Equipment Net Capitalized software development costs, net Capitalized Computer Software Net Right-of-use assets Operating Lease Right Of Use Asset Deferred commission expense, net of current portion Deferred Costs Other assets Other Assets Noncurrent Intangible assets, net Finite Lived Intangible Assets Net Goodwill Goodwill Total assets Assets Liabilities and stockholders’ equity Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued compensation costs Employee Related Liabilities Current Accrued expenses and other current liabilities Accrued Liabilities And Other Liabilities Operating lease liabilities Operating Lease Liability Current Deferred revenue Contract With Customer Liability Current Total current liabilities Liabilities Current Operating lease liabilities, net of current portion Operating Lease Liability Noncurrent Deferred revenue, net of current portion Contract With Customer Liability Noncurrent Other long-term liabilities Other Liabilities Noncurrent Convertible senior notes Convertible Long Term Notes Payable Total liabilities Liabilities Commitments and contingencies (Note 10) Commitments And Contingencies Stockholders’ equity: Stockholders Equity [Abstract] Common stock Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Accounts receivable, net of allowance for doubtful accounts Allowance For Doubtful Accounts Receivable Current Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Subscription [Member] Subscription And Circulation [Member] Professional Services and Other [Member] Service [Member] Statement [Line Items] Statement [Line Items] Revenues: Disaggregation Of Revenue [Abstract] Total revenue Revenue From Contract With Customer Excluding Assessed Tax Cost of revenues: Cost Of Goods And Services Sold [Abstract] Total cost of revenues Cost Of Goods And Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense Sales and marketing Selling And Marketing Expense General and administrative General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other expense: Nonoperating Income Expense [Abstract] Interest income Investment Income Interest Interest expense Interest Expense Other expense Other Nonoperating Income Expense Total other expense Nonoperating Income Expense Loss before income tax expense Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Net loss Net Income Loss Net loss per share, basic and diluted Earnings Per Share Basic And Diluted Weighted average common shares used in computing basic and diluted net loss per share: Weighted Average Number Of Share Outstanding Basic And Diluted Statement Of Income And Comprehensive Income [Abstract] Net loss Other comprehensive loss: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Foreign currency translation adjustment Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent Changes in unrealized (loss) gain on investments, net of income taxes of ($15) thousand and ($91) thousand for the three and nine months ended September 30, 2020, and ($12) thousand and $257 thousand for the three and nine months ended September 30, 2019. Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent Comprehensive loss Comprehensive Income Net Of Tax Changes in unrealized (loss) gain on investments, income taxes Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent Repayment of convertible senior notes attributable to debt discount. (Accretion) amortization of debt discount premium. Increase (decrease) in right of use assets. Increase decrease in operating lease liabilities. The cash outflow associated with the investments in private companies. Proceeds from settlement of convertible notes. Payments for capped call options related to convertible senior notes. Issuance of common stock for repayment of convertible notes. Statement Of Cash Flows [Abstract] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Convertible senior notes related to hedges due two thousand twenty two. 2022 Convertible Notes Convertible Senior Notes Related To Hedges Due Two Thousand Twenty Two [Member] Operating Activities: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss Adjustments to reconcile net loss to net cash and cash equivalents provided by operating activities Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation Depletion And Amortization Stock-based compensation Share Based Compensation Loss on early extinguishment of 2022 Convertible Notes Gains Losses On Extinguishment Of Debt Repayment of 2022 Convertible Notes attributable to the debt discount Repayment Of Convertible Senior Notes Attributable To Debt Discount (Benefit) provision for deferred income taxes Deferred Income Tax Expense Benefit Amortization of debt discount and issuance costs Amortization Of Financing Costs And Discounts Accretion of bond discount Accretion Amortization Of Debt Discount Premium Unrealized currency translation Foreign Currency Transaction Gain Loss Unrealized Changes in assets and liabilities Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Deferred commission expense Increase Decrease In Deferred Compensation Right-of-use assets Increase Decrease In Right Of Use Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Operating lease liabilities Increase Decrease In Operating Lease Liabilities Deferred revenue Increase Decrease In Contract With Customer Liability Net cash and cash equivalents provided by operating activities Net Cash Provided By Used In Operating Activities Investing Activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of investments Payments To Acquire Available For Sale Securities Debt Maturities of investments Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Sale of investments Proceeds From Sale Of Available For Sale Securities Debt Purchases of property and equipment Payments To Acquire Property Plant And Equipment Capitalization of software development costs Payments To Develop Software Purchases of strategic investments Payment For Purchase Of Strategic Investments Net cash and cash equivalents used in investing activities Net Cash Provided By Used In Investing Activities Financing Activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from issuance of 2025 Convertible Notes, net of issuance costs paid of $9.9 million Proceeds From Issuance Of Long Term Debt Proceeds from settlement of Convertible Note Hedges related to the 2022 Convertible Notes Proceeds From Settlement Of Convertible Notes Payments for settlement of Warrants related to the 2022 Convertible Notes Payments For Repurchase Of Warrants Repayment of 2022 Convertible Notes attributable to the principal Repayments Of Long Term Debt Payments for Capped Call Options related to the 2025 Convertible Notes Payments For Capped Call Options Related To Convertible Senior Notes Proceeds from common stock offering, net of offering costs paid of $365 Proceeds From Issuance Of Common Stock Employee taxes paid related to the net share settlement of stock-based awards Payments Related To Tax Withholding For Share Based Compensation Proceeds related to the issuance of common stock under stock plans Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options Repayments of finance lease obligations Finance Lease Principal Payments Net cash and cash equivalents provided by financing activities Net Cash Provided By Used In Financing Activities Effect of exchange rate changes on cash, cash equivalents, and restricted cash Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Net increase in cash, cash equivalents and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash, cash equivalents and restricted cash, beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, cash equivalents and restricted cash, end of period Supplemental cash flow disclosure: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Net Cash paid for income taxes Income Taxes Paid Right-of-use assets obtained in exchange for operating lease liabilities Right Of Use Asset Obtained In Exchange For Operating Lease Liability Non-cash investing and financing activities: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Capital expenditures incurred but not yet paid Capital Expenditures Incurred But Not Yet Paid Asset retirement obligations Settlement Of Asset Retirement Obligations Through Noncash Payments Amount Issuance of common stock for repayment of 2022 Convertible Notes Issuance Of Common Stock For Repayment Of Convertible Notes Convertible notes, issuance costs Payments Of Debt Issuance Costs Offering costs paid Payments Of Stock Issuance Costs Accounting Policies [Abstract] Organization and Operations Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Revenue From Contract With Customer [Abstract] Revenues Revenue From Contract With Customer [Text Block] Leases [Abstract] Leases Lessee Operating Leases [Text Block] Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Cash And Cash Equivalents [Abstract] Restricted cash Cash And Cash Equivalents Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Research And Development [Abstract] Capitalized Software Development Costs Research Development And Computer Software Disclosure [Text Block] Debt Disclosure [Abstract] Convertible Senior Notes Long Term Debt [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Stockholders Equity Note [Abstract] Changes in Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Equity [Abstract] Changes in Accumulated Other Comprehensive Loss Comprehensive Income Note [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Expense Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Segment Reporting [Abstract] Segment Information and Geographic Data Segment Reporting Disclosure [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Revenue Revenue Recognition Policy [Text Block] Schedule of Allowance for Doubtful Accounts Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Schedule of operating sublease income. Schedule of Operating Sublease Income Generated under Operating Lease Agreements Schedule Of Operating Sublease Income Table [Text Block] Summary of Reconciliation of Denominator Used in Calculation of Basic and Diluted Net Loss Per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Potentially Dilutive Common Stock Equivalents Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule of Fair Value Measurements of Financial Assets and Liabilities Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Table [Text Block] Summary of Composition of Short and Long Term Investments Debt Securities Available For Sale Table [Text Block] Summary of Contractual Maturities of Short and Long Term Investments Investments Classified By Contractual Maturity Date Table [Text Block] Tabular disclosure of reconciliation of cash cash equivalents and restricted cash. Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash Schedule Of Cash And Cash Equivalents Restricted Cash And Cash Equivalents Table [Text Block] Schedule of Property and Equipment, Net Property Plant And Equipment [Text Block] Tabular disclosure of capitalized software and developments costs, including the gross balance incurred, accumulated amortization, and net value. Summary of Capitalized Software Development Costs, Exclusive of those Recorded within Property and Equipment Summary Of Capitalized Software Development Costs Table [Text Block] Summary of components of capitalized software, including costs capitalized during the period, amortization expense recorded during the period, and stock-based compensation expense capitalized as past of capitalized computer software during the period. Summary of Capitalized Software Development Costs Including Stock-Based Compensation and Amortization Research Development And Computer Software Table [Text Block] Debt Instrument [Table] Debt Instrument [Table] Zero point three seven five percent convertible senior notes due two thousand twenty five as liability component. 0.375%Convertible Senior Notes Due 2025 as Liability Component [Member] Zero Point Three Seven Five Percent Convertible Senior Notes Due Two Thousand Twenty Five As Liability Component [Member] Zero point three seven five percent convertible senior notes due two thousand twenty five as equity component. 0.375% Convertible Senior Notes Due 2025 as Equity Component [Member] Zero Point Three Seven Five Percent Convertible Senior Notes Due Two Thousand Twenty Five As Equity Component [Member] Zero point three seven five percent convertible senior notes due two thousand twenty five. 0.375% Convertible Senior Notes Due 2025 [Member] Zero Point Three Seven Five Percent Convertible Senior Notes Due Two Thousand Twenty Five [Member] Zero point two five percent convertible senior notes due two thousand twenty two as liability component. 0.25% Convertible Senior Notes Due 2022 as Liability Component [Member] Zero Point Two Five Percent Convertible Senior Notes Due Two Thousand Twenty Two As Liability Component [Member] Zero point two five percent convertible senior notes due two thousand twenty two as equity component. 0.25%Convertible Senior Notes Due 2022 as Equity Component [Member] Zero Point Two Five Percent Convertible Senior Notes Due Two Thousand Twenty Two As Equity Component [Member] Zero point two five percent convertible senior notes due two thousand twenty two. 0.25% Convertible Senior Notes Due 2022 [Member] Zero Point Two Five Percent Convertible Senior Notes Due Two Thousand Twenty Two [Member] Zero point two five percent convertible senior notes due two thousand twenty two as net equity impact. 0.25% Convertible Senior Notes Due 2022 as Net Equity Impact [Member] Zero Point Two Five Percent Convertible Senior Notes Due Two Thousand Twenty Two As Net Equity Impact [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Net Carrying Amount of Notes Convertible Debt Table [Text Block] Schedule of interest expense. Schedule of Interest Expense Schedule Of Interest Expense Table [Text Block] Components of net equity impact on additional paid in capital. Schedule of Net Equity Impact, Included in Additional Paid-in Capital, of the Liability and Equity Components Components Of Net Equity Impact On Additional Paid In Capital Table [Text Block] Schedule of Future Minimum Payments Contractual Obligation Fiscal Year Maturity Schedule Table [Text Block] Summary of Changes in Stockholders' Equity Schedule Of Stockholders Equity Table [Text Block] Changes in Accumulated Other Comprehensive Loss Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Schedule of Stock-Based Compensation Expense by Award Type Disclosure Of Share Based Compensation Arrangements By Share Based Payment Award [Text Block] Effect of Stock-Based Compensation on Income by Line Item Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Revenues by Geographical Region Revenue From External Customers By Geographic Areas Table [Text Block] Long Lived Assets by Geographical Region Long Lived Assets By Geographic Areas Table [Text Block] Contract with customer liability additions. Revenue remaining performance obligation percentage recognized. Revenue remaining performance obligation contract period. Additional invoice recognized. Revenue Initial Application Period Cumulative Effect Transition [Table] Revenue Initial Application Period Cumulative Effect Transition [Table] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Accrued expenses and other current liabilities. Accrued Expenses and Other Current Liabilities [Member] Accrued Expenses And Other Current Liabilities [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Additions in deferred revenue Contract With Customer Liability Additions Additional Invoicing Additional Invoice Recognized Total revenues Deferred revenue, revenue recognized Contract With Customer Liability Revenue Recognized Revenue remaining performance obligation, contracts exceeds one year Revenue Remaining Performance Obligation Revenue remaining performance obligation contract period Revenue Remaining Performance Obligation Contract Period Revenue remaining performance obligation percentage recognized Revenue Remaining Performance Obligation Percentage Recognized Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis] Revenue remaining performance obligations recognition period Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 Short-term deferred revenue Amortization period of deferred sales commissions. Amortization period of deferred commissions Amortization Period Of Deferred Sales Commissions Incremental costs of deferred sales commission. Increase (decrease) in deferred sales commission. Increase (decrease) in deferred commission expense Increase Decrease In Deferred Sales Commission Incremental costs of deferred sales commission expense Incremental Costs Of Deferred Sales Commission Amortization of deferred commission expense Amortization Of Deferred Sales Commissions Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract] Beginning Balance Provision Provision For Doubtful Accounts Write-offs, net of recoveries Allowance For Doubtful Accounts Receivable Write Offs Ending Balance Operating lease right of use asset additions. Operating lease liability noncurrent additions. Lessee Lease Description [Table] Lessee Lease Description [Table] Lessee Lease Description [Line Items] Lessee Lease Description [Line Items] Operating lease term Lessee Operating Lease Term Of Contract Operating lease, aggregate base rent payments, excluding renewal options Operating Leases Rent Expense Net Operating leases right-of-use assets additions Operating Lease Right Of Use Asset Additions Operating leases lease liabilities additions Operating Lease Liability Noncurrent Additions Weighted average discount rate for operating leases Operating Lease Weighted Average Discount Rate Percent Operating lease costs Operating Lease Cost Operating sublease income Sublease Income Cash payments for operating lease liabilities Operating Lease Payments Earnings Per Share Basic And Diluted [Abstract] Weighted-average common shares outstanding — basic Weighted Average Number Of Shares Outstanding Basic Dilutive effect of share equivalents resulting from stock options, RSUs, ESPP, Warrants and the Conversion Options Weighted Average Number Diluted Shares Outstanding Adjustment Weighted-average common shares, outstanding — diluted Weighted Average Number Of Diluted Shares Outstanding Average stock price. Schedule Of Earnings Per Share Basic By Common Class [Table] Schedule Of Earnings Per Share Basic By Common Class [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock [Member] Common Stock [Member] Earnings Per Share Basic [Line Items] Earnings Per Share Basic [Line Items] Common stock conversion price Debt Instrument Convertible Conversion Price1 Average stock price Average Stock Price Debt instrument, convertible, threshold trading days Debt Instrument Convertible Threshold Trading Days Debt instrument, convertible, threshold consecutive trading days Debt Instrument Convertible Threshold Consecutive Trading Days1 Percentage of closing price to trigger debt conversion Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger Warrants exercise price per share Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 Earnings Per Share Diluted Other Disclosures [Abstract] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] ESPP [Member] Employee Stock [Member] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Options to Purchase Common Shares [Member] Employee Stock Option [Member] RSUs [Member] Restricted Stock Units R S U [Member] Conversion Option of the 2022 Notes and Warrants [Member] Convertible Debt Securities [Member] Convertible Senior Notes due 2025. Conversion Option of the 2025 Notes [Member] Convertible Senior Notes Due Two Thousand Twenty Five [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of earnings per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Money Market Funds [Member] Money Market Funds [Member] Commercial Paper [Member] Commercial Paper [Member] Corporate Bonds [Member] Corporate Bond Securities [Member] US Treasury Securities [Member] U S Treasury Securities [Member] Certificates of Deposit [Member] Certificates Of Deposit [Member] Fair Value, Inputs, Level 2 [Member] Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value Inputs Level1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Inputs Level2 [Member] Fair Value, Inputs, Level 3 [Member] 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] Fair value of cash and cash equivalents Cash And Cash Equivalents Fair Value Disclosure Fair value of short and long term investments Available For Sale Securities Debt Securities Fair value of restricted cash Restricted Cash Fair Value Disclosure Fair value of financial assets Assets Fair Value Disclosure Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] 2022 Notes [Member] 2025 Notes [Member] Strategic investments. Strategic Investments [Member] Strategic Investments [Member] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair value of notes Notes Payable Fair Value Disclosure Impairment charges Asset Impairment Charges Debt Securities Available For Sale [Table] Debt Securities Available For Sale [Table] Commercial Paper [Member] Commercial Paper Not Included With Cash And Cash Equivalents [Member] US treasury securities excluding cash and cash equivalents. US Treasury Securities [Member] U S Treasury Securities Excluding Cash And Cash Equivalents [Member] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Amortized Cost Available For Sale Debt Securities Amortized Cost Basis Unrealized Gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Unrealized Losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Aggregate Fair Value Amortized Cost Basis, Due within one year Available For Sale Securities Debt Maturities Within One Year Amortized Cost Amortized Cost Basis, Due after 1 year through 2 years Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Aggregate Fair Value, Due within one year Available For Sale Securities Debt Maturities Within One Year Fair Value Aggregate Fair Value, Due after 1 year through 2 years Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Aggregate Fair Value, Total Restricted cash, included in prepaid expenses and other current assets Restricted Cash Current Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List] Restricted Cash Current Asset Statement Of Financial Position Extensible List Restricted cash, included in other assets Restricted Cash Noncurrent Restricted Cash, Asset, Statement of Financial Position [Extensible List] Restricted Cash Asset Statement Of Financial Position Extensible List Total cash, cash equivalents, and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Computer equipment and purchased software. Computer Equipment and Purchased Software [Member] Computer Equipment And Purchased Software [Member] Employee related computer equipment. Employee Related Computer Equipment [Member] Employee Related Computer Equipment [Member] Furniture and Fixtures [Member] Furniture And Fixtures [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Equipment under Finance Lease [Member] Assets Held Under Capital Leases [Member] Internal Use Software [Member] Software Development [Member] Construction in Progress [Member] Construction In Progress [Member] Property, Plant and Equipment [Line Items] Property Plant And Equipment [Line Items] Total property and equipment Property Plant And Equipment Gross Less accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Depreciation and amortization Depreciation And Amortization Capitalized Computer Software Net [Abstract] Gross capitalized software development costs Capitalized Computer Software Gross Accumulated amortization Capitalized Computer Software Accumulated Amortization Capitalized software development costs, net Capitalized software estimated useful life. Capitalized software, estimated useful life Capitalized Software Estimated Useful Life Capitalized computer software. Capitalized computer software. Capitalized Computer Software [Table] Capitalized Computer Software [Table] Capitalized Computer Software [Line Items] Capitalized Computer Software [Line Items] Software development costs capitalized Capitalized Computer Software Additions Stock-based compensation included in capitalized software development costs Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount Amortization of capitalized software development costs Capitalized Computer Software Amortization1 Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Private Offering [Member] Private Placement [Member] Over-Allotment Options [Member] Over Allotment Option [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Liability component. Liability Component [Member] Liability Component [Member] Equity component. Equity Component [Member] Equity Component [Member] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Capped call options. Capped Call Options [Member] Capped Call Options [Member] 2022 Notes partial repurchase. 2022 Notes Partial Repurchase [Member] Two Thousand And Twenty Two Notes Partial Repurchase [Member] 2022 notes convertible note hedges. 2022 Convertible Note Hedges [Member] Two Thousand And Twenty Two Notes Convertible Note Hedges [Member] Warrants [Member] Warrant [Member] Principal amount of long term debt Debt Instrument Face Amount Debt instrument, interest rate, stated percentage Debt Instrument Interest Rate Stated Percentage Debt instrument, maturity date Debt Instrument Maturity Date Debt instrument, payment terms Debt Instrument Payment Terms Proceeds from issuance of notes Debt instrument convertible, principal amount Repayments Of Convertible Debt Debt instrument convertible, principal amount Debt Instrument Convertible Carrying Amount Of The Equity Component Debt instrument convertible conversion ratio denominator. Description of principal amount settlement. Principal amount of each convertible note Debt Instrument Convertible Conversion Ratio Denominator Debt instrument, conversion ratio Debt Instrument Convertible Conversion Ratio1 Debt Instrument, Redemption Price, Percentage Debt Instrument Redemption Price Percentage Debt Instrument, Redemption, Description Debt Instrument Redemption Description Principal amount settlement, Description Description Of Principal Amount Settlement Carrying amount of equity component Debt Instrument Convertible Gross Carrying Amount Of The Equity Component Debt instrument, effective interest rate Debt Instrument Interest Rate Effective Percentage Debt issuance costs Deferred Finance Costs Net Principal Unamortized debt discount Debt Instrument Unamortized Discount Unamortized issuance costs Unamortized Debt Issuance Expense Net carrying amount Debt discount for conversion option Issuance costs Net carrying amount Contractual interest expense Interest Expense Debt Excluding Amortization Amortization of debt discount Amortization Of Debt Discount Premium Amortization of issuance costs Amortization Of Financing Costs Total interest expense Interest Expense Debt Cost of purchased capped call options. Common stock shares covered under capped call transactions. Cost of purchased capped call options Cost Of Purchased Capped Call Options Common stock shares covered under capped call transactions Common Stock Shares Covered Under Capped Call Transactions Derivative, price risk option strike price Derivative Price Risk Option Strike Price Derivative, cap price Derivative Cap Price Number of common shares to be repurchased under convertible note hedge transactions. Hedging option strike price per common stock. Warrants expected to settle description. Settlement period of warrants excess price over strike price. Warrants expected to settle, commencement date. Convertible notes hedge and warrant transactions cost net. Number of common shares to be repurchased under convertible note hedge transactions with certain counterparties Number Of Common Shares To Be Repurchased Under Convertible Note Hedge Transactions Hedging option strike price per common stock Hedging Option Strike Price Per Common Stock Cost of convertible note hedge transactions Derivative Cost Of Hedge Warrants holders option to purchase number of shares of company’s common stock Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights Warrants expected to settle, description Warrants Expected To Settle Description Settlement period of warrants excess price over strike price Settlement Period Of Warrants Excess Price Over Strike Price Warrants expected to settle, commencement date Warrants Expected To Settle Commencement Date Sales of warrants Proceeds From Issuance Of Warrants Net of issuance costs Proceeds From Debt Net Of Issuance Costs Convertible notes hedge and warrant transactions cost net Convertible Notes Hedge And Warrant Transactions Cost Net Debt instrument aggregate purchase price. Debt instrument convertible to common stock. Debt instrument convertible to common stock value per share. Debt instrument aggregate consideration. Repurchase of aggregate principal amount Debt Instrument Repurchased Face Amount Debt instrument, aggregate purchase price Debt Instrument Aggregate Purchase Price Debt instrument convertible to common stock Debt Instrument Convertible To Common Stock Debt instrument convertible to common stock, value per share Debt Instrument Convertible To Common Stock Value Per Share Debt instrument, aggregate consideration Debt Instrument Aggregate Consideration Fair value of debt component of repurchases Debt Instrument Fair Value Unamortized debt discount Unamortized issuance costs Loss on early extinguishment of debt Adjustments to additional paid in capital, equity component of convertible debt Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Debt instrument convertible to common stock for cash consideration. Debt instrument cash consideration for conversion. Debt instrument convertible to common stock for cash consideration Debt Instrument Convertible To Common Stock For Cash Consideration Debt instrument cash consideration for conversion Debt Instrument Cash Consideration For Conversion Debt instrument conversion option of the net equity. Conversion Option Debt Instrument Conversion Option Of The Net Equity Issuance of common stock for repayment of 2022 Notes Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Proceeds from settlements of Convertible Note Hedges Payments for settlement of Warrants Adjustments To Additional Paid In Capital Warrant Issued Total Amount future lease payments would increase by if early termination clauses were not followed. Commitments and contingencies. Commitments and Contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Other Commitments Other Commitments [Axis] Other Commitments Other Commitments [Domain] Amended agreement. Amended Agreement [Member] Amended Agreement [Member] Related Party Transaction Related Party Transaction [Axis] Related Party Transaction Related Party Transaction [Domain] Web hosting vendor. Web Hosting Vendor [Member] Web Hosting Vendor [Member] Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Improvement reimbursements from landlords Payments For Proceeds From Tenant Allowance Increase in future lease commitments Increase In Future Lease Commitments Lessee operating lease liability payments due after year four. Operating, 2020 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Operating, 2021 Lessee Operating Lease Liability Payments Due Next Twelve Months Operating, 2022 Lessee Operating Lease Liability Payments Due Year Two Operating, 2023 Lessee Operating Lease Liability Payments Due Year Three Operating, 2024 Lessee Operating Lease Liability Payments Due Year Four Operating, Thereafter Lessee Operating Lease Liability Payments Due After Year Four Lease commitments, Operating leases Lessee Operating Lease Liability Payments Due Description of contractual obligation. Terms of payment for the contractual obligation. Description of contractual obligation Description Of Contractual Obligation Contractual obligation, payment term Contractual Obligation Payment Term Contractual obligation Contractual Obligation Debt instrument convertible carrying amount of the equity component shares. Payments for capped calls and transactions costs. Taxes paid on restricted stock units vesting. Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Additional Paid-In Capital [Member] Additional Paid In Capital [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Accumulated Deficit [Member] Retained Earnings [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Beginning Balance, Amount Beginning Balance, Shares Shares Outstanding Issuance of common stock under stock plans, net of shares withheld for employee taxes Stock Issued During Period Value Employee Stock Purchase Plan Issuance of common stock under stock plans, net of shares withheld for employee taxes, Shares Stock Issued During Period Shares Employee Stock Purchase Plans Restricted stock units taxes paid in cash Taxes Paid On Restricted Stock Units Vesting Equity component of notes payable, net of issuance costs & repayment Equity component of notes payable, net of issuance costs & repayment, Shares Debt Instrument Convertible Carrying Amount Of The Equity Component Shares Purchase of Capped Call Options Payments For Capped Calls And Transactions Costs Issuance of common stock to extinguish 2022 Notes Stock Issued During Period Value Issued For Services Issuance of common stock to extinguish 2022 Notes, Shares Stock Issued During Period Shares Issued For Services Issuance of common stock in relation to common stock offering, net of offering costs incurred $365 Stock Issued During Period Value New Issues Issuance of common stock in relation to common stock offering, net of offering costs incurred $365, Shares Stock Issued During Period Shares New Issues Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Cumulative translation adjustment Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax Unrealized gain (loss) on investments, net of income taxes of ($76), ($15), $269 and (12) Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Ending Balance, Amount Ending Balance, Shares Stock issuance costs. Offering costs incurred Stock Issuance Costs Unrealized gain (loss) on investments, tax Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income Loss [Table] Cumulative Translation Adjustment [Member] Accumulated Translation Adjustment [Member] Unrealized Gain on Investments [Member] Accumulated Net Unrealized Investment Gain Loss [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Other comprehensive loss before reclassifications Oci Before Reclassifications Net Of Tax Attributable To Parent Amounts reclassified from accumulated other comprehensive income Reclassification From Aoci Current Period Net Of Tax Attributable To Parent Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Common Stock Options [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Total stock-based compensation expense Allocated Share Based Compensation Expense Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost of subscription revenues. Cost of Revenue, Subscription [Member] Cost Of Subscription Revenues [Member] Cost of revenue, professional services and other. Cost of Revenue, Professional Services and Other [Member] Cost Of Revenue Professional Services And Other [Member] Research and Development [Member] Research And Development Expense [Member] Sales and Marketing [Member] Selling And Marketing Expense [Member] General and Administrative [Member] General And Administrative Expense [Member] Capitalized software and property plant and equipment. Capitalized Software and PP&E [Member] Capitalized Software And Property Plant And Equipment [Member] Capitalized software development costs excluded from stock based compensation Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Revenue [Member] Sales Revenue Net [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Rest of the world. Outside Of United States [Member] Rest Of The World [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Geographic Concentration Risk [Member] Geographic Concentration Risk [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of operating segment Number Of Operating Segments Americas [Member] Americas [Member] Europe [Member] Europe [Member] Asia Pacific [Member] Asia Pacific [Member] Outside of Americas. Outside Of Americas [Member] Outside Of Americas [Member] Percentage of revenues generated outside of the Americas Concentration Risk Percentage1 Concentration risk, percentage Right of use asset and property plant and equipment net. Assets Total [Member] Assets Total [Member] Total long lived assets Right Of Use Asset And Property Plant And Equipment Net Percentage of long lived assets held outside of the Americas