Statement of Comprehensive Income [Abstract] Net loss Net Income (Loss) Attributable to Parent Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Unrealized gain on investments in securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of reportable segments Number of Reportable Segments Intangible Assets, Net (Including Goodwill) [Abstract] INTANGIBLE ASSETS, GOODWILL, AND OTHER ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Cumulative effect, period of adoption, adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Issued Beginning balance Stockholders' Equity Attributable to Parent Adjustment to opening balance for change in accounting principle Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Issuance of common stock under stock plans, less withholding (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Issuance of common stock under stock plans, less withholding Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Issuance of common stock related to acquisition Stock Issued During Period, Value, Acquisitions Unrealized investment gain Foreign currency translation adjustment Ending balance (in shares) Ending balance Leases [Abstract] Operating lease expense Operating Lease, Cost Variable lease expense Variable Lease, Cost Share-based Payment Arrangement [Abstract] STOCK-BASED COMPENSATION Shareholders' Equity and Share-based Payments [Text Block] Earnings Per Share [Abstract] NET LOSS PER SHARE Earnings Per Share [Text Block] Income Tax Disclosure [Abstract] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Schedule of Carrying Value of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash, current Restricted Cash, Current Short-term investments Short-term Investments Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Deferred sales commission costs, current Capitalized Contract Cost, Net, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Operating lease, right-of-use assets Operating Lease, Right-of-Use Asset Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Restricted cash, non-current Restricted Cash, Noncurrent Long-term investments Long-term Investments Deferred sales commission costs, non-current Capitalized Contract Cost, Net, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued compensation Employee-related Liabilities, Current Accrued taxes Accrued Income Taxes, Current Operating lease liabilities, current Operating Lease, Liability, Current Deferred revenue, current Contract with Customer, Liability, Current Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Operating lease liabilities, non-current Operating Lease, Liability, Noncurrent Convertible senior notes, net Long-term Debt, Excluding Current Maturities Other liabilities, non-current Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 8) Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Revenue from Contract with Customer [Abstract] Accounts receivable, net Contract assets, current, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract assets, non-current, net Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Deferred revenue, current Deferred revenue, non-current Contract with Customer, Liability, Noncurrent Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Wavecell Pte. Ltd. Wavecell Pte. Ltd. [Member] Wavecell Pte. Ltd. [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Total consideration Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2017 Repurchase Plan 2017 Repurchase Plan [Member] 2017 Repurchase Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Authorized repurchase amount Stock Repurchase Program, Authorized Amount Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization of intangible assets Amortization of Intangible Assets Amortization of capitalized software Capitalized Computer Software, Amortization Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Amortization of deferred sales commission costs Amortization of Deferred Sales Commissions Allowance for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Operating lease expense, net of accretion Operating Lease Expense, Net Of Accretion Operating Lease Expense, Net Of Accretion Stock-based compensation Share-based Payment Arrangement, Noncash Expense Other Other Operating Activities, Cash Flow Statement Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Deferred sales commission costs Increase (Decrease) in Deferred Charges Other current and non-current assets Increase (Decrease) in Other Operating Assets Accounts payable and accruals Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Cost of capitalized software Payments for Software Proceeds from maturities of investments Proceeds from Sale, Maturity and Collection of Short-term Investments Proceeds from sales of investments Proceeds from Sale and Maturity of Marketable Securities Purchases of investments Payments to Acquire Marketable Securities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Finance lease payments Finance Lease, Principal Payments Tax-related withholding of common stock Payment, Tax Withholding, Share-based Payment Arrangement Proceeds from issuance of common stock under employee stock plans Proceeds from Stock Plans Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net decrease in cash and 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 at the beginning of the period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, and restricted cash at the end of the period Supplemental and non-cash disclosures: Supplemental Cash Flow Information [Abstract] Income taxes paid Income Taxes Paid Reconciliation Of Cash Cash Equivalents And Restricted Cash [Abstract] Reconciliation Of Cash Cash Equivalents And Restricted Cash [Abstract] Reconciliation Of Cash Cash Equivalents And Restricted Cash [Abstract] Restricted cash, non-current Total cash, cash equivalents, and restricted cash Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed technology Patented Technology [Member] Customer relationships Customer Relationships [Member] Trade and domain names Trade Names [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-lived intangible assets, remaining amortization period Finite-Lived Intangible Assets, Remaining Amortization Period Capitalized contract cost, amortization Capitalized Contract Cost, Amortization Assets Operating Lease, Right-Of-Use Asset, Lessee [Abstract] Operating Lease, Right-Of-Use Asset, Lessee [Abstract] Operating lease, right-of-use assets Liabilities Operating Lease, Lease Liability, Lessee [Abstract] Operating Lease, Lease Liability, Lessee [Abstract] Operating lease liabilities, current Operating lease liabilities, non-current Total operating lease liabilities Operating Lease, Liability Fair Value Disclosures [Abstract] Schedule of Fair Value Measurements Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES International Non-US [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Aggregate Notes Aggregate Notes [Member] Aggregate Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Contractual interest expense Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount Amortization of Debt Discount Amortization of issuance costs Amortization of Debt Issuance Costs Total interest expense Interest Expense, Debt Schedule of Share-based Payment Arrangement, Activity Share-based Payment Arrangement, Activity [Table Text Block] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning balance Foreign currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, ending balance Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Contract with customer, revenue recognized Contract with Customer, Liability, Revenue Recognized Subscription term Revenue, Subscription Term Revenue, Subscription Term Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Sales Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service Service [Member] Other revenue Product and Service, Other [Member] Stock-based compensation expense Share-based Payment Arrangement, Expense CONVERTIBLE SENIOR NOTES AND CAPPED CALL Debt Disclosure [Text Block] LEASES Lessee, Operating Leases [Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Contract Balances Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Stock Option Rollforward Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock options outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding at the end of the period (in shares) Weighted-average fair value of grants during the period (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Total intrinsic value of options exercised during the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Weighted-average remaining recognition period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Stock Award Rollforward Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Stock awards outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Stock awards granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock awards vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Stock awards canceled and forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Stock awards outstanding at the end of the period (in shares) Weighted-average fair value of grants during the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-average remaining recognition period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Total unrecognized compensation expense at period-end Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount GEOGRAPHICAL INFORMATION Segment Reporting Disclosure [Text Block] Revenue, remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amount Finite-Lived Intangible Assets, Net DESCRIPTION OF BUSINESS Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Fiscal Period Fiscal Period, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Reclassifications and Other Changes Reclassification, Comparability Adjustment [Policy Text Block] Recently Adopted Accounting Pronouncements, Recent Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] INCOME TAXES Income Tax Disclosure [Text Block] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Remainder of 2021 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Principal Debt Instrument, Face Amount Unamortized debt discount Debt Instrument, Unamortized Discount Unamortized issuance costs Debt Issuance Costs, Net Net carrying amount Long-term Debt Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Numerator: Earnings Per Share Reconciliation [Abstract] Net loss available to common stockholders Denominator: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Common shares - basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Net loss per share Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Cover [Abstract] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One 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 Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Income Statement [Abstract] Other Total revenue Operating expenses: Operating Expenses [Abstract] Cost of goods and services sold Cost of Goods and Services Sold 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 income (expense), net Nonoperating Income (Expense) Loss before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net loss Net loss per share: Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic and diluted (in shares) Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Restricted Cash, Current and Other Accrued Liabilities Restricted Cash, Current And Other Accrued Liabilities [Member] Restricted Cash, Current And Other Accrued Liabilities [Member] Additional paid-in capital Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Time-Based Restricted Stock Awards Time-Based Restricted Stock Awards [Member] Time-Based Restricted Stock Awards [Member] Performance-Based Restricted Stock Awards Performance-Based Restricted Stock Awards [Member] Performance-Based Restricted Stock Awards [Member] Business combination, consideration transferred Business Combination, Consideration Transferred Payments to acquire business Payments to Acquire Businesses, Gross Business combination, value of stock issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Cash held back to cover indemnity claims Business Combination, Indemnification Assets, Cash Held Back Business Combination, Indemnification Assets, Cash Held Back Equity held back to cover indemnity claims Business Combination, Indemnification Assets, Equity Held Back Business Combination, Indemnification Assets, Equity Held Back Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Schedule of Convertible Debt Convertible Debt [Table Text Block] Schedule of Interest Income and Interest Expense Disclosure Interest Income and Interest Expense Disclosure [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Cash and Cash Equivalents Cash and Cash Equivalents [Member] Restricted Cash (Current & Non-Current) Restricted Cash [Member] Restricted Cash [Member] Short-Term Investments Short-term Investments [Member] Long-Term Investments Long-term Investments [Member] Long-term Investments [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Money market funds Money Market Funds [Member] Cash Cash [Member] Treasury securities US Treasury Securities [Member] Certificate of deposit Certificates of Deposit [Member] Commercial paper Commercial Paper [Member] Corporate debt Corporate Debt Securities [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and cash equivalents Cash and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Amortized cost Debt Securities, Available-for-sale, Amortized Cost Accumulated gross unrealized gain, before tax Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Accumulated gross unrealized loss, before tax Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Debt securities, available-for-sale Debt Securities, Available-for-sale Cash, cash equivalents and debt securities available-for-sale, amortized cost Cash, Cash Equivalents and Debt Securities Available-for-sale, Amortized Cost Cash, Cash Equivalents and Debt Securities Available-for-sale Cash, cash equivalents and debt securities available-for-sale Cash, Cash Equivalents and Debt Securities Available-for-sale Cash, Cash Equivalents and Debt Securities Available-for-sale Schedule of Assets and Liabilities, Leases Assets and Liabilities, Lessee [Table Text Block] Assets and Liabilities, Lessee [Table Text Block] Schedule of Lease, Cost Lease, Cost [Table Text Block] Schedule of Lessee, Operating Leases, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Remainder of 2021 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2022 Lessee, Operating Lease, Liability, to be Paid, Year One 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Total lease payments Lessee, Operating Lease, Liability, to be Paid Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less: lease incentives receivable Lease Incentive Receivable Present value of lease liabilities Initial Notes Initial Notes [Member] Initial Notes Debt Securities, Available-for-sale, Amortized Cost Debt instrument, fair value Debt Instrument, Fair Value Disclosure Contract assets Contract With Customer, Asset Contract With Customer, Asset Change in contract assets Increase (Decrease) in Contract with Customer, Asset Deferred revenue Contract with Customer, Liability Change in deferred revenue Increase (Decrease) in Contract with Customer, Liability BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Operating cash flow from operating leases Operating Lease, Payments Term of contract Lessee, Operating Lease, Term of Contract Area of real estate property Area of Real Estate Property Liability related to lease assignment Lease Assignment Lease Liability Lease Assignment Lease Liability Termination fee Loss on Contract Termination Receivable related to lease assignment Lease Assignment Receivable Lease Assignment Receivable Additional Notes Additional Notes [Member] Additional Notes [Member] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Call Option Call Option [Member] Debt instrument, face value Debt instrument, interest rate Debt Instrument, Interest Rate, Stated Percentage Proceeds from issuance of debt Proceeds from Debt, Net of Issuance Costs Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Debt instrument, convertible, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Debt instrument, convertible, threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger 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 Days Debt instrument, strike price per share (in dollars per share) Option Indexed to Issuer's Equity, Strike Price Debt instrument, initial cap price per share (in dollars per share) Option Indexed To Issuer's Equity, Cap Price Option Indexed To Issuer's Equity, Cap Price Option indexed to issuer's equity, indexed shares (in shares) Option Indexed to Issuer's Equity, Indexed Shares Payments for capped call transactions Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] State And Local Taxes And Surcharges State And Local Taxes And Surcharges [Member] State And Local Taxes And Surcharges [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss Contingency Accrual Loss Contingency Accrual Finite-Lived Intangible Assets, Major Class Name [Domain] Trade and domain names Technology-Based Intangible Assets [Member] Total intangible assets Finite-lived Intangible Assets Acquired Useful life (in Years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Property and equipment, net Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options Share-based Payment Arrangement, Option [Member] Stock awards Restricted Stock [Member] Potential shares to be issued from ESPP Shares Issued Under Employee Stock Purchase Plan [Member] Shares Issued Under Employee Stock Purchase Plan Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount