Income Tax Disclosure [Abstract]
Schedule of Deferred Taxes [Table]
Schedule of Deferred Taxes [Table]
Schedule of Deferred Taxes [Table]
Statement, Scenario [Axis]
Scenario [Axis]
Scenario [Domain]
Scenario [Domain]
Forecast [Member]
Forecast [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Meru Networks, Inc. [Member]
Meru Networks, Inc. [Member]
Meru Networks, Inc. [Member]
AccelOps, Inc. [Member]
AccelOps, Inc. [Member]
AccelOps, Inc. [Member]
Bradford Networks, Inc. [Member]
Bradford Networks, Inc. [Member]
Bradford Networks, Inc. [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Federal [Member]
Domestic Tax Authority [Member]
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
California [Member]
State Jurisdiction, California [Member]
State Jurisdiction, California [Member]
Deferred Taxes [Line Items]
Deferred Taxes [Line Items]
Deferred Taxes [Line Items]
Benefit to tax provision resulting from basis difference
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Tax Book Basis Difference, Amount
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Tax Book Basis Difference, Amount
Increase to income tax expense
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)
Tax benefit related to transition tax
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Amount
Tax expense recorded in association with GILTI, FDII and foreign tax credits provisions
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Global Intangible Low-Taxed Income, Amount
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Global Intangible Low-Taxed Income, Amount
Increase in unrecognized tax benefits related to Ninth Circuit Altera decision
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities
Deferred tax assets:
Components of Deferred Tax Assets [Abstract]
General business credit carryforward
Deferred Tax Assets, Tax Credit Carryforwards, General Business
Deferred revenue
Deferred Tax Assets, Deferred Income
Reserves and accruals
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals
Net operating loss carryforward
Deferred Tax Assets, Operating Loss Carryforwards
Stock-based compensation expense
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Depreciation and amortization
Deferred Tax Assets, Property, Plant and Equipment
Operating lease liabilities
Deferred Tax Assets, Operating Lease Liabilities
Deferred Tax Assets, Operating Lease Liabilities
Total deferred tax assets
Deferred Tax Assets, Gross
Less: Valuation allowance
Deferred Tax Assets, Valuation Allowance
Deferred tax assets, net of valuation allowance
Deferred Tax Assets, Net of Valuation Allowance
Deferred tax liabilities:
Deferred Tax Liabilities, Gross [Abstract]
Deferred contract costs
Deferred Tax Liabilities, Deferred Expense
Operating lease ROU assets
Deferred Tax Liabilities, Leasing Arrangements
Total deferred tax liabilities
Deferred Tax Liabilities, Gross
Net deferred tax assets
Deferred Tax Assets, Net
Deferred tax asset recorded
Deferred Income Tax Assets, Net
Deferred tax liability recorded
Deferred Income Tax Liabilities, Net
Net operating loss carryforwards
Operating Loss Carryforwards
Tax credit carryforwards
Tax Credit Carryforward, Amount
Tax benefit
Income Tax Expense (Benefit)
Tax impact of Canadian deemed dividend distribution
Effective Income Tax Rate Reconciliation, Canadian Deemed Dividend Distribution
Effective Income Tax Rate Reconciliation, Canadian Deemed Dividend Distribution
Retirement Benefits [Abstract]
Matching contribution on employee contributions, Percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Maximum contribution percentage of each employee's eligible earnings, Percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Matching contributions to the RRSP and 401(k) Plans
Defined Contribution Plan, Employer Matching Contribution, Amount
Defined Contribution Plan, Employer Matching Contribution, Amount
Accounting Policies [Abstract]
Short-term investments, minimum original maturity
Investments, Classification as Short-term, Minimum Original Maturity
Investments, Classification as Short-term, Minimum Original Maturity
Short-term investments, maximum original maturity
Investments, Classification as Short-term, Maximum Original Maturity
Investments, Classification as Short-term, Maximum Original Maturity
Long-term investments, minimum original maturity
Investments, Classification as Long-term, Minimum Maturity
Investments, Classification as Long-term, Minimum Maturity
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Sales Commissions [Member]
Sales Commissions [Member]
Sales Commissions [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Revenue recognized that was previously included in deferred revenue in prior year
Contract with Customer, Liability, Revenue Recognized
Remaining performance obligation
Revenue, Remaining Performance Obligation, Amount
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss
Revenue recognition period (in years)
Revenue Recognition Period
Revenue Recognition Period
Amortization of deferred contract costs
Capitalized Contract Cost, Amortization
Impairment loss
Capitalized Contract Cost, Impairment Loss
Tax at federal statutory tax rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Foreign income taxed at different rates
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Foreign withholding taxes
Effective Income Tax Rate Reconciliation, Foreign Withholding Taxes, Amount
Effective Income Tax Rate Reconciliation, Foreign Withholding Taxes, Amount
Stock-based compensation expense
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount
Foreign tax credit
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount
State taxes—net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Research and development credit
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Dividend distribution
Deferred tax asset remeasurement due to reduction in the federal corporate income tax rate
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
One-time transition tax
Global Intangible Low-Taxed Income
Book-to-Tax Basis differences
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Provision for income taxes
Leases [Abstract]
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Remaining terms (less than for minimum)
Operating Lease, Remaining Lease Term
Operating Lease, Remaining Lease Term
Renewal terms (up to)
Lessee, Operating Lease, Renewal Term
Finance lease liabilities arising from obtaining right-of-use assets
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Finance lease term
Lessee, Finance Lease, Term of Contract
Rent expense
Operating Leases, Rent Expense, Net
Additional minimum lease payments relating to operating office space lease signed but not yet commenced
Operating Lease, Lease Not yet Commenced, Expense
Operating Lease, Lease Not yet Commenced, Expense
Lease not yet commenced, approximate term
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract
Share-based Payment Arrangement [Abstract]
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Schedule of Share-based Compensation, Shares Withheld for Taxes
Schedule of Share-based Compensation, Shares Withheld for Taxes [Table Text Block]
Schedule of Share-based Compensation, Shares Withheld for Taxes [Table Text Block]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions And Allocation of Recognized Period Costs [Table Text Block]
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.
Schedule of Share-based Compensation, Stock Options, Activity
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
Schedule of Share-based Payment Award Employee Stock Purchase Plan Additional Information
Schedule of Share based Payment Award Employee Stock Purchase Plan Additional Information [Table Text Block]
Schedule of Share based Payment Award Employee Stock Purchase Plan Additional Information [Table Text Block]
Schedule of Shares Reserved for Future Issuance
Schedule of Shares Reserved for Future Issuance [Table Text Block]
Schedule of Shares Reserved for Future Issuance [Table Text Block]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type [Table Text Block]
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type [Table Text Block]
Income Tax Benefit from Stock Option Plans
Income Tax Benefit from Stock Option Plans [Table Text Block]
Income Tax Benefit from Stock Option Plans [Table Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS - Net
Goodwill and Intangible Assets Disclosure [Text Block]
Subsequent Events [Abstract]
Subsequent Event
Subsequent Events [Text Block]
Financial Instruments and Fair Value [Abstract]
Financial Instruments and Fair Value [Abstract]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Fair Value [Member]
Estimate of Fair Value Measurement [Member]
Reported as [Member]
Reported Value Measurement [Member]
Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Corporate debt securities [Member]
Corporate Debt Securities [Member]
Certificates of deposit and term deposits [Member]
Certificates of Deposit [Member]
Money market funds [Member]
Money Market Funds, Excluding Commercial Paper [Member]
Money Market Funds, Excluding Commercial Paper [Member]
Commercial paper [Member]
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
U.S. government and agency securities [Member]
US Treasury and Government [Member]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Recurring [Member]
Fair Value, Recurring [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Cash equivalents [Member]
Cash Equivalents, Line Item [Member]
Cash Equivalents, Line Item [Member]
Short-term investments [Member]
Short Term Investments, Line Item [Member]
Short Term Investments, Line Item [Member]
Long-term investments [Member]
Long Term Investments, Line Item [Member]
Long Term Investments, Line Item [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Level 3 [Member]
Fair Value, Inputs, Level 3 [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]
Available-for-sale securities, Fair Value Disclosure
Available-for-sale Securities
Total Assets, Fair Value Disclosure
Assets, Fair Value Disclosure
Components of Lease Expense and Supplemental Cash Flow Information
Lease, Cost [Table Text Block]
Supplemental Balance Sheet Information
Assets And Liabilities, Lessee [Table Text Block]
Assets And Liabilities, Lessee [Table Text Block]
Maturities of Operating Lease Liabilities
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Schedule of Future Principal Contractual Obligations for Operating Lease Commitments
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Schedule of Finite-Lived Intangible Assets by Major Class [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Useful life of finite-lived intangible assets
Finite-Lived Intangible Asset, Useful Life
INCOME TAXES
Income Tax Disclosure [Text Block]
Consolidated Statements of Comprehensive Income [Abstract]
Consolidated Statements of Comprehensive Income [Abstract]
Statement [Table]
Statement [Table]
Statement [Line Items]
Statement [Line Items]
Net income
Net Income (Loss) Attributable to Parent
Other comprehensive income (loss):
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract]
Change in unrealized gains (losses) on investments
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax
Tax provision (benefit) related to change in unrealized gains (losses) on investments
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Investments, All Other Investments [Abstract]
Investments in equity securities of privately-held companies
Equity Securities without Readily Determinable Fair Value, Amount
Non-cash impairment charge
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount
Proceeds from sale of equity securities of privately held company
Proceeds from Sale of Equity Securities Without Readily Determinable Fair Value
Proceeds from Sale of Equity Securities Without Readily Determinable Fair Value
Recognized gain on sale of equity securities of privately held company
Equity Securities Without Readily Determinable Fair Value, Realized Gain (Loss)
Equity Securities Without Readily Determinable Fair Value, Realized Gain (Loss)
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 Technologies and Other [Member]
Developed Technology Rights [Member]
Customer Relationships [Member]
Customer Relationships [Member]
Weighted average useful life
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Net [Abstract]
Gross
Finite-Lived Intangible Assets, Gross
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Total
Finite-Lived Intangible Assets, Net
Amortization expense
Amortization of Intangible Assets
Statement of Financial Position [Abstract]
Reserves for sales returns and doubtful accounts
Allowance For Doubtful Accounts Receivable and Sales Returns
Allowance For Doubtful Accounts Receivable and Sales Returns
Common Stock, par value (dollars per share)
Common Stock, Par or Stated Value Per Share
Common Stock, shares authorized
Common Stock, Shares Authorized
Common Stock, shares issued
Common Stock, Shares, Issued
Common Stock, shares outstanding
Common Stock, Shares, Outstanding
Revenue from External Customers by Products and Services [Table]
Revenue from External Customers by Products and Services [Table]
Revenue from External Customer [Line Items]
Revenue from External Customer [Line Items]
Estimate for sales return reserve
Contract with Customer, Refund Liability, Current
Sales return reserve, reduction to accounts receivable
Accounts Receivable, after Allowance for Credit Loss, Current
Invoice payable period (in years)
Revenue from Contract with Customers, General Invoice Payable Period
Revenue from Contract with Customers, General Invoice Payable Period
FINANCIAL INSTRUMENTS AND FAIR VALUE
Financial Instruments Disclosure [Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
ESPP [Member]
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term in years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Volatility
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Risk-free interest rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Dividend rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Weighted-average fair value per share granted (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
Number of reporting units
Number of Reporting Units
Operating lease expense
Operating Lease, Cost
Variable lease expense
Variable Lease, Cost
Short-term lease expense
Short-term Lease, Cost
Total lease expense
Lease, Cost
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Share Repurchase Program [Member]
Share Repurchase Program [Member]
Share Repurchase Program [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments, by Title of Individual [Axis]
Title of Individual [Axis]
Title of Individual with Relationship to Entity [Domain]
Title of Individual [Domain]
Individual Owning 10 Percent or More of Stock [Member]
Individual Owning 10 Percent or More of Stock [Member]
Individual Owning 10 Percent or More of Stock [Member]
Employee [Member]
Employee [Member]
Employee [Member]
Directors and Other Service Providers [Member]
Directors and Other Service Providers [Member]
Directors and Other Service Providers [Member]
Individual Owning 10 Percent or Less of Stock [Member]
Individual Owning 10 Percent or Less of Stock [Member]
Individual Owning 10 Percent or Less of Stock [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
2009 Equity Incentive Plan (Amended Plan) [Member]
Stock Plan, 2009 [Member]
Stock Plan, 2009 [Member]
Stock Options, Nonqualifying [Member]
Stock Options, Nonqualifying [Member]
Stock Options, Nonqualifying [Member]
Stock Options [Member]
Share-based Payment Arrangement, Option [Member]
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Stock Options and Restricted Stock Units, Outstanding [Member]
Stock Options and Restricted Stock Units, Outstanding [Member]
Stock Options and Restricted Stock Units, Outstanding [Member]
Stock-based Compensation Plan [Member]
Share-based Payment Arrangement [Member]
Number of primary stock incentive plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Primary Stock Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Primary Stock Incentive Plans
Number of shares deregistered (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Deregistered
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Deregistered
Number of shares authorized (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Shares reserved for future issuances (in shares)
Common Stock, Capital Shares Reserved for Future Issuance
Minimum stock ownership percent triggering early award expiration
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration
Percent of market price for non-statutory options
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Exericse Price as Percent of Fair Value On Grant Date
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Exericse Price as Percent of Fair Value On Grant Date
Award expiration period
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period
Maximum stock ownership percent triggering early award expiration
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Stock Ownership Percent For Options Granted to Individuals
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Stock Ownership Percent For Options Granted to Individuals
Option contractual term
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Remaining shares available for grant under the plans (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Maximum employee contribution rate (percent)
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate
Purchase price of common stock as percentage of lower of fair market value of common stock on first day of offering period or last day of purchase period
Purchase Price of Common Stock As Percentage Of Lower Of Fair Market Value Of Common Stock On First Day Of Offering Period Or Last Day Of Purchase Period
Purchase Price of Common Stock As Percentage Of Lower Of Fair Market Value Of Common Stock On First Day Of Offering Period Or Last Day Of Purchase Period
Periodic purchase limit (shares)
Employee Stock Purchase Plan, Periodic Purchase Limit
Employee Stock Purchase Plan, Periodic Purchase Limit
Annual purchase limit
Employee Stock Purchase Plan, Annual Purchase Limit
Employee Stock Purchase Plan, Annual Purchase Limit
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance - Beginning (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Balance - Ending (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Balance - Beginning (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Forfeited (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Balance - Ending (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options vested and expected to vest, Outstanding (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Options vested and expected to vest, Weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Options vested and expected to vest, Weighted average remaining contractual life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Options vested and expected to vest, Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Options exercisable, Outstanding (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Options exercisable, Weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Options exercisable, Weighted average remaining contractual life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Options exercisable, Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Compensation cost not yet recognized
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Compensation cost not yet recognized period of recognition
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Weighted-average fair value per share granted
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Intrinsic value of options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Total fair value of awards vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value
Granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Statement of Cash Flows [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Stock-based compensation
Share-based Payment Arrangement, Noncash Expense
Depreciation and amortization
Depreciation, Depletion and Amortization
Amortization of investment premiums (discounts)
Accretion (Amortization) of Discounts and Premiums, Investments
Other
Other Noncash Income (Expense)
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in business combinations:
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Accounts receivable—net
Increase (Decrease) in Accounts Receivable
Inventory
Increase (Decrease) in Inventories
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Deferred contract costs
Increase (Decrease) in Contract with Customer, Liability
Deferred tax assets
Increase (Decrease) in Deferred Income Taxes
Other assets
Increase (Decrease) in Other Operating Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Accrued liabilities
Increase (Decrease) in Accrued Liabilities
Accrued payroll and compensation
Increase (Decrease) in Employee Related Liabilities
Other liabilities
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Deferred revenue
Increase (Decrease) in Deferred Revenue
Income taxes payable
Increase (Decrease) in Income Taxes Payable
Net cash provided by 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 investments
Payments to Acquire Investments
Sales of investments
Proceeds from Sale of Available-for-sale Securities
Maturities of investments
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale
Purchases of property and equipment
Payments to Acquire Productive Assets
Payments made in connection with business combinations, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repurchase and retirement of common stock
Payments for Repurchase of Common Stock
Proceeds from issuance of common stock
Proceeds from Issuance of Common Stock
Taxes paid related to net share settlement of equity awards
Payment, Tax Withholding, Share-based Payment Arrangement
Payments of debt assumed in connection with business combinations
Repayments of Assumed Debt
Other
Proceeds from (Payments for) Other Financing Activities
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
NET INCREASE IN CASH AND CASH EQUIVALENTS
Cash and Cash Equivalents, Period Increase (Decrease)
CASH AND CASH EQUIVALENTS—Beginning of year
Cash and Cash Equivalents, at Carrying Value
CASH AND CASH EQUIVALENTS—End of year
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Supplemental Cash Flow Information [Abstract]
Cash paid for income taxes—net
Income Taxes Paid, Net
Operating lease liabilities arising from obtaining right-of-use assets
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Cash paid to settle liability incurred for repurchase of common stock
Repurchase of Common Stock, Settlement of Liabilities Incurred
Repurchase of Common Stock, Settlement of Liabilities Incurred
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Transfers of evaluation units from inventory to property and equipment
Transfers of Evaluation Units from Inventory to Property and Equipment
Transfers of Evaluation Units from Inventory to Property and Equipment
Liability for purchase of property and equipment and asset retirement obligations
Capital Expenditures Incurred but Not yet Paid
Liability incurred for repurchase of common stock
Repurchase of Common Stock, Liabilities Incurred
Repurchase of Common Stock, Liabilities Incurred
Liability incurred in connection with business combination
Business Combination, Consideration Transferred, Liabilities Incurred
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]
Performance obligation expected recognition period for three-fourths of remaining obligation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Product [Member]
Product [Member]
Service [Member]
Service [Member]
Security Subscription [Member]
Security Subscription [Member]
Security Subscription [Member]
Technical Support [Member]
Technical Support [Member]
Technical Support [Member]
Total revenue
Revenue from Contract with Customer, Excluding Assessed Tax
2016 Share Repurchase Program [Member]
Share Repurchase Program [Line Items]
Stock repurchase program, authorized amount
Stock Repurchase Program, Authorized Amount
Additional shares authorized
Stock Repurchase Program, Additional Authorized Amount
Stock Repurchase Program, Additional Authorized Amount
Stock repurchased in the period, shares
Stock Repurchased and Retired During Period, Shares
Stock repurchased in the period, value
Stock Repurchased and Retired During Period, Value
Stock repurchase program, unused balance
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance, beginning (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Forfeited (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Vested (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Balance, ending (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance, weighted-average grant-date fair value per share (in dollars per share)—beginning
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted, weighted-average grant-date fair value per share (in dollars per share)
Forfeited, weighted-average grant-date fair value per share (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Vested, weighted-average grant-date fair value per share (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Balance, weighted-average grant-date fair value per share (in dollars per share)—ending
Shares withheld for taxes (in shares)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation
Tax withholding upon vesting of restricted stock awards
2020
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months
2021
Lessee, Operating Lease, Liability, Payments, Due Year Two
2022
Lessee, Operating Lease, Liability, Payments, Due Year Three
2023
Lessee, Operating Lease, Liability, Payments, Due Year Four
2024
Lessee, Operating Lease, Liability, Payments, Due Year Five
Thereafter
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Total lease payments
Lessee, Operating Lease, Liability, Payments, Due
Less imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Total
Operating Lease, Liability
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost
Debt Securities, Available-for-sale, Amortized Cost
Unrealized Gains
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax
Unrealized Losses
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax
Fair Value
Debt Securities, Available-for-sale
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value
Less Than 12 Months, Unrealized Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
12 Months or Greater, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
12 Months or Greater, Unrealized Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Total, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Total, Unrealized Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value
Due within one to three years
Available-for-sale Securities, Debt Maturities, after One Year, Fair Value
This item represents the fair value of debt securities which are expected to mature after one year from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
Fair Value
Cover page.
Document Type
Document Type
Document Annual Report
Document Annual 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 Well Known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
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 Public Float
Entity Public Float
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Documents Incorporated by Reference
Documents Incorporated by Reference [Text Block]
Entity Central Index Key
Entity Central Index Key
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Shares issued under the ESPP (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Weighted-average price per share issued (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share
Inventory Disclosure [Abstract]
Inventory, Net [Abstract]
Raw materials
Inventory, Raw Materials, Net of Reserves
Finished goods
Inventory, Finished Goods, Net of Reserves
Inventory
Inventory, Net
INVENTORY
Inventory Disclosure [Text Block]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Inventory
Schedule of Inventory, Current [Table Text Block]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive (Loss) Income [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Unrealized Gains and Losses on Investments [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax
Other comprehensive loss before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Amounts reclassified from accumulated other comprehensive income (loss)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Net current-period other comprehensive loss
Other Comprehensive Income (Loss), before Tax
Ending balance
Tax Benefit Related To Items of Other Comprehensive Income or Loss [Roll Forward]
Accumulated Other Comprehensive Income, Tax [Roll Forward]
Accumulated Other Comprehensive Income, Tax [Roll Forward]
Beginning balance, tax
Accumulated Other Comprehensive Income Loss Tax
Accumulated Other Comprehensive Income Loss Tax
Other comprehensive income before reclassifications, tax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Amounts reclassified from accumulated other comprehensive income (loss), tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax
Net current-period other comprehensive income, tax
Other Comprehensive Income (Loss), Tax
Ending balance, tax
Income Statement [Abstract]
REVENUE:
COST OF REVENUE:
Cost of Goods and Services Sold [Abstract]
Total cost of revenue
Cost of Goods and Services Sold
GROSS PROFIT:
Gross Profit [Abstract]
Total 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
Restructuring charges
Restructuring Charges
Total operating expenses
Operating Expenses
OPERATING INCOME
Operating Income (Loss)
INTEREST INCOME—NET
Investment Income, Net
OTHER INCOME (EXPENSE)—NET
Other Nonoperating Income (Expense)
INCOME BEFORE INCOME TAXES
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
PROVISION FOR (BENEFIT FROM) INCOME TAXES
NET INCOME
Net income per share (Note 9):
Earnings Per Share [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Weighted-average shares outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of Income before Income Tax, Domestic and Foreign
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Aggregate Changes in Unrecognized Tax Benefits
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Summary of Investments
Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block]
Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block]
Schedule of Unrealized Loss on Investments
Schedule of Unrealized Loss on Investments [Table Text Block]
Investments Classified by Contractual Maturity Date
Investments Classified by Contractual Maturity Date [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Commitments and Contingencies Disclosure [Abstract]
Summary of Inventory Purchase Commitments
Contractual Obligation, Fiscal Year Maturity [Table Text Block]
Foreign currency transaction gains (losses)
Foreign Currency Transaction Gain (Loss), before Tax
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Balance - beginning of period
Goodwill
Additions due to business combinations
Goodwill, Acquired During Period
Balance - end of period
Goodwill impairment
Goodwill, Impairment Loss
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 Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Share-based Payment Arrangement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Income Tax Liabilities - Non-current [Member]
Income Tax Liabilities - Non-current [Member]
Income Tax Liabilities - Non-current [Member]
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would favorably affect effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Accrued interest and penalties related to uncertain tax benefits
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of year
Unrecognized Tax Benefits
Gross increases for tax positions related to the current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Gross decreases for tax positions related to the current year
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions
Gross increases for tax positions related to the prior year
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Gross decreases for tax positions related to prior year
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Gross decreases for tax positions related to prior year audit settlements
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Gross decreases for tax positions related to expiration of statute of limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Unrecognized tax benefits, end of year
Liability for uncertain tax positions
Liability for Uncertainty in Income Taxes, Noncurrent
Net increase of gross unrecognized tax benefits
Unrecognized Tax Benefits, Period Increase (Decrease)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit
ACCUMULATED OTHER COMPREHENSIVE LOSS
Comprehensive Income (Loss) Note [Text Block]
Concentration Risk [Table]
Concentration Risk [Table]
Concentration Risk by Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Customer Concentration Risk [Member]
Customer Concentration Risk [Member]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
Exclusive Networks Group [Member]
Exclusive Networks Group [Member]
Exclusive Networks Group [Member]
Ingram Micro [Member]
Ingram Micro [Member]
Ingram Micro [Member]
Concentration Risk by Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Accounts Receivable [Member]
Accounts Receivable [Member]
Sales Revenue [Member]
Sales Revenue [Member]
Sales Revenue [Member]
Concentration Risk [Line Items]
Concentration Risk [Line Items]
Concentration (percent)
Concentration Risk, Percentage
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Statement, Geographical [Axis]
Geographical [Axis]
Segment, Geographical [Domain]
Geographical [Domain]
Americas [Member]
Americas [Member]
United States
UNITED STATES
Canada
CANADA
Latin America
Latin America [Member]
Other Americas
Other Americas [Member]
Other Americas [Member]
EMEA
Europe, Middle East and Africa [Member]
Europe, Middle East and Africa [Member]
APAC
Asia Pacific and Japan [Member]
Asia Pacific and Japan [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Business activity (in business activities)
Number of Business Activities
Number of business activities
Segment managers responsible for operations (in segment managers)
Number of Segment Managers Responsible for Operations
Number of Segment Managers Responsible for Operations
Number of operating segments (in operating segments)
Number of Operating Segments
Number of reportable segments (in reportable segments)
Number of Reportable Segments
Revenue
Property and equipment - net
Property, Plant and Equipment, Net
DEFINED CONTRIBUTION PLANS
Compensation and Employee Benefit Plans [Text Block]
Statement of Stockholders' Equity [Abstract]
Common Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, shares
Shares, Issued
Balance
Stockholders' Equity Attributable to Parent
Issuance of common stock in connection with equity incentive plans - net of tax withholding (in shares)
Stock Issued During Period, Shares, Equity Incentive Plans
Stock Issued During Period, Shares, Equity Incentive Plans
Issuance of common stock in connection with equity incentive plans - net of tax withholding
Stock Issued During Period, Value, Equity Incentive Plans, Net of Taxes Withheld
Stock Issued During Period, Value, Equity Incentive Plans, Net of Taxes Withheld
Repurchase and retirement of common stock (in shares)
Repurchase and retirement of common stock
Stock-based compensation expense
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Cumulative-effect adjustment from adoption of new accounting principle
Cumulative Effect of New Accounting Principle in Period of Adoption
Net unrealized gain (loss) on investments - net of taxes
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Balance, shares
Balance
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [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]
ASSETS
Assets [Abstract]
CURRENT ASSETS:
Assets, Current [Abstract]
Cash and cash equivalents
Short-term investments
Short-term Investments
Accounts receivable—Net of reserves for doubtful accounts of $1.2 million and $0.9 million at December 31, 2019 and 2018, respectively
Inventory
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
LONG-TERM INVESTMENTS
Long-term Investments
PROPERTY AND EQUIPMENT—NET
DEFERRED CONTRACT COSTS
Capitalized Contract Cost, Net
DEFERRED TAX ASSETS
OTHER INTANGIBLE ASSETS—NET
Intangible Assets, Net (Excluding Goodwill)
GOODWILL
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 liabilities
Accrued Liabilities, Current
Accrued payroll and compensation
Employee-related Liabilities, Current
Income taxes payable
Accrued Income Taxes, Current
Deferred revenue
Deferred Revenue, Current
Total current liabilities
Liabilities, Current
DEFERRED REVENUE
Deferred Revenue, Noncurrent
INCOME TAX LIABILITIES
Accrued Income Taxes, Noncurrent
OTHER LIABILITIES
Other Liabilities, Noncurrent
Total liabilities
Liabilities
COMMITMENTS AND CONTINGENCIES (Note 11)
Commitments and Contingencies
STOCKHOLDERS’ EQUITY:
Stockholders' Equity Attributable to Parent [Abstract]
Common stock, $0.001 par value—300 shares authorized; 171.7 shares and 169.8 shares issued and outstanding at December 31, 2019 and 2018, respectively
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital, Common Stock
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Retained earnings (accumulated deficit)
Retained Earnings (Accumulated Deficit)
Total stockholders’ equity
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity
Schedule of Estimated Useful Lives of Property and Equipment - net
Schedule of Estimated Useful Lives of Property, Plant and Equipment [Table Text Block]
Schedule of Estimated Useful Lives of Property, Plant and Equipment [Table Text Block]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
Reserves for Sales Returns and Allowance for Doubtful Accounts [Member]
Allowance for Doubtful Accounts & Reserve for Sales Returns [Member]
Allowance for Doubtful Accounts & Reserve for Sales Returns [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount
Charged to costs and expenses, net of deductions
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense
Adjustment due to adoption of Topic 606
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment
Ending balance
Amount of sales return reserve reclassified from accounts receivable to accrued liabilities
Customer Refund Liability, Current
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment by Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Building and building improvements [Member]
Building and Building Improvements [Member]
Computer equipment and software [Member]
Computer Equipment [Member]
Land [Member]
Land [Member]
Leasehold improvements and tooling [Member]
Leaseholds and Leasehold Improvements [Member]
Evaluation units [Member]
Evaluation Units [Member]
Evaluation units [Member]
Furniture and fixtures [Member]
Furniture and Fixtures [Member]
Construction-in-progress [Member]
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Net, by Type [Abstract]
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 expense
Depreciation
Revenue from external customers by geographic region
Revenue from External Customers by Geographic Areas [Table Text Block]
Property and equipment by geographic region
Long-lived Assets by Geographic Areas [Table Text Block]
LEASES
Lessee, Operating Leases [Text Block]
LEASES
Lessee, Finance Leases [Text Block]
Schedule of Changes in Carrying Value of Goodwill
Schedule of Goodwill [Table Text Block]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block]
Schedule of Finite-Lived and Indefinite-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]
Inventory purchase commitments
Purchase Obligation
Other contractual commitments and open purchase orders
Other Commitment
Commissions Expense [Table]
Commissions Expense [Table]
Commissions Expense [Table]
Commissions Expense [Line Items]
Commissions Expense [Line Items]
[Line Items] for Commissions Expense [Table]
Schedule of Warranties [Table]
Schedule of Warranties [Table]
Schedule of Warranties [Table]
Hardware Products [Member]
Hardware, Product Warranty [Member]
Hardware, Product Warranty [Member]
Software Products [Member]
Software, Product Warranty [Member]
Software, Product Warranty
Warranties [Line Items]
Warranties [Line Items]
Warranties [Line Items]
Warranty length
Warranty Length
Warranty Length
Schedule of Earnings Per Share [Table]
Schedule of Earnings Per Share [Table]
Earnings Per Share [Line Items]
Earnings Per Share [Line Items]
Earnings Per Share [Line Items]
Basic shares:
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted-average common shares outstanding-basic (in shares)
Diluted shares:
Effect of potentially dilutive securities:
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Employee stock options and purchase rights (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted-average shares used to compute diluted net income per share (in shares)
Diluted (in dollars per share)
2019
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2020
Operating Leases, Future Minimum Payments, Due in Two Years
2021
Operating Leases, Future Minimum Payments, Due in Three Years
2022
Operating Leases, Future Minimum Payments, Due in Four Years
2023
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total
Operating Leases, Future Minimum Payments Due
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Significant Accounting Policies [Text Block]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Cost of product revenue [Member]
Cost of Goods Sold [Member]
Cost of Goods Sold [Member]
Cost of service revenue [Member]
Cost of Services [Member]
Cost of Services [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]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense
Share-based Payment Arrangement, Expense
Income tax benefit from employee stock option plans
Share-based Payment Arrangement, Exercise of Option, Tax Benefit
Inventory purchase commitments
Purchase Obligation, Fiscal Year Maturity [Abstract]
2020
Purchase Obligation, Due in Next Twelve Months
2021
Purchase Obligation, Due in Second Year
2022
Purchase Obligation, Due in Third Year
2023
Purchase Obligation, Due in Fourth Year
2024
Purchase Obligation, Due in Fifth Year
Thereafter
Purchase Obligation, Due after Fifth Year
Total
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Topic 842 [Member]
Accounting Standards Update 2016-02 [Member]
ASU 2018-02 [Member]
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
ROU assets recognized for operating leases
Operating Lease, Right-of-Use Asset
Lease liabilities recognized for operating leases
Business Combinations [Abstract]
BUSINESS COMBINATIONS
Business Combination Disclosure [Text Block]
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Title of Individual [Axis]
Title of Individual [Domain]
Non-executive Employee [Member]
Performance Share, Weighted Average Assumptions [Abstract]
Performance Share, Weighted Average Assumptions [Abstract]
Performance Share, Weighted Average Assumptions [Abstract]
Granted (shares)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Domestic
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Foreign
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Basis of Presentation and Preparation
Presentation and Preparation of Consolidated Financial Statements [Policy Text Block]
Presentation and Preparation of Consolidated Financial Statements [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Concentration of Credit Risk
Concentration Risk [Policy Text Block]
Concentration Risk [Policy Text Block]
Financial Instruments and Fair Value
Fair Value of Financial Instruments, Policy [Policy Text Block]
Comprehensive Income
Comprehensive Income Loss [Policy Text Block]
Comprehensive Income Loss [Policy Text Block]
Foreign Currency and Transaction Gains and Losses
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Cash, Cash Equivalents and Available-for-sale Investments
Cash and Cash Equivalents and Available-for-Sale Investments [Policy Text Block]
Cash and Cash Equivalents and Available-for-Sale Investments [Policy Text Block]
Inventory
Inventory, Policy [Policy Text Block]
Property and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Other Investments
Cost Method Investments, Policy [Policy Text Block]
Business Combinations
Business Combinations Policy [Policy Text Block]
Impairment of Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Other Intangible Assets
Intangible Assets, Finite-Lived, Policy [Policy Text Block]
Deferred Revenue
Revenue from Contract with Customer [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Stock-Based Compensation
Share-based Payment Arrangement [Policy Text Block]
Leases
Lessee, Leases [Policy Text Block]
Advertising Expense
Advertising Cost [Policy Text Block]
Research and Development Costs
Research and Development Expense, Policy [Policy Text Block]
Commissions Expense
Commissions Expense, Policy [Policy Text Block]
Software Development Costs
Software to be Sold, Leased, or Otherwise Marketed, Policy [Policy Text Block]
Revenue Recognition
Revenue [Policy Text Block]
Warranties
Standard Product Warranty, Policy [Policy Text Block]
Contingent Liabilities
Commitments and Contingencies, Policy [Policy Text Block]
Recently Adopted Accounting Standards and Recent Accounting Standards Not Yet Effective
New Accounting Pronouncements, Policy [Policy Text Block]
Current:
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal
Current Federal Tax Expense (Benefit)
State
Current State and Local Tax Expense (Benefit)
Foreign
Current Foreign Tax Expense (Benefit)
Total current
Current Income Tax Expense (Benefit)
Deferred:
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal
Deferred Federal Income Tax Expense (Benefit)
State
Deferred State and Local Income Tax Expense (Benefit)
Foreign
Deferred Foreign Income Tax Expense (Benefit)
Total deferred
Deferred Income Tax Expense (Benefit)
Provision for (benefit from) income taxes
PROPERTY AND EQUIPMENT—Net
Property, Plant and Equipment Disclosure [Text Block]
Fiscal Years:
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2023
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Operating lease ROU assets – non-current
Operating lease liabilities – current
Operating Lease, Liability, Current
Operating lease liabilities – non-current
Operating Lease, Liability, Noncurrent
Total operating lease liabilities
Weighted average remaining lease term in years – operating leases
Operating Lease, Weighted Average Remaining Lease Term
Weighted average discount rate – operating leases
Operating Lease, Weighted Average Discount Rate, Percent
Revenue Recognition
Revenue from Contract with Customer [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
CyberSponse, Inc. [Member]
CyberSponse, Inc. [Member]
CyberSponse, Inc. [Member]
EnSilo Ltd. [Member]
EnSilo Ltd. [Member]
EnSilo Ltd. [Member]
ZoneFox Holdings Limited [Member]
ZoneFox Holdings Limited [Member]
ZoneFox Holdings Limited [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Purchase price
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Goodwill not deductible for tax purposes
Identifiable intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Liability incurred in connection with business combination
Business Combination, Liabilities Incurred
Business Combination, Liabilities Incurred
Liability incurred in connection with business combination, amount included in preliminary purchase price
Liability incurred in connection with business combination, amount recognized as compensation cost in consolidated statement of income
Business Combination, Compensation Expense, Liabilities Incurred
Business Combination, Compensation Expense, Liabilities Incurred
Amount held in indemnity escrow
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow
Amount held in indemnity escrow, expected to be held for 12 months
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Twelve Months After Closing Date
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Twelve Months After Closing Date
Amount held in indemnity escrow, expected to be held for 36 months
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Thirty-Six Months After Closing Date
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Thirty-Six Months After Closing Date
Cash consideration that may be paid as an earn-out subject to satisfaction of certain performance conditions
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Subsequent Event [Table]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Member]
Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Mutual covenant-not-to-sue agreement, initial term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Initial Term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Initial Term
Proceeds from mutual covenant-not-to-sue agreement
Proceeds From Mutual Covenant-Not-to-Sue Agreement
Proceeds From Mutual Covenant-Not-to-Sue Agreement
Mutual covenant-not-to-sue agreement, additional proceeds if extended
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Additional Proceeds
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Additional Proceeds
Mutual covenant-not-to-sue agreement, total proceeds if extension option utilized
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Total Proceeds Expected If Extension Option Utilized
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Total Proceeds Expected If Extension Option Utilized
Mutual covenant-not-to-sue agreement, extension term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Term
Cash paid for amounts included in the measurement of lease liabilities
Cash Flow, Lessee [Abstract]
Cash Flow, Lessee [Abstract]
Operating cash flows used for operating leases
Operating Lease, Payments
Lease liabilities arising from obtaining right-of-use assets
Lease Liabilities Arising from Obtaining Right-of-Use Assets [Abstract]
Lease Liabilities Arising from Obtaining Right-of-Use Assets [Abstract]
Operating leases
Property and equipment, useful life
Property, Plant and Equipment, Useful Life
INVESTMENTS IN PRIVATELY-HELD COMPANIES
Cost-method Investments, Description [Text Block]
NET INCOME PER SHARE
Earnings Per Share [Text Block]
Share-based Payment Arrangement, Option, Exercise Price Range [Table]
Share-based Payment Arrangement, Option, Exercise Price Range [Table]
Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis]
Exercise Price Range [Axis]
Exercise Price Range [Domain]
Exercise Price Range [Domain]
$19.94-24.51 [Member]
Price Range One [Member]
Price Range One [Member]
26.49-39.49 [Member]
Price Range Two [Member]
Price Range Two [Member]
48.83-72.75 [Member]
Price Range Three [Member]
Price Range Three [Member]
76.22-100.12 [member]
Price Range Four [Member]
Price Range Four [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit
Exercise Price, maximum (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit
Options Outstanding, Number Outstanding (in shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding
Options Outstanding, Weighted Average Remaining Contractual Life (in years)
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term
Options Outstanding, Weighted Average Exercise Price (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price
Options Exercisable, Number Exercisable (in shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable
Options Exercisable, Weighted Average Exercise Price (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price
Property, Plant and Equipment - Net
Property, Plant and Equipment [Table Text Block]
SEGMENT INFORMATION
Segment Reporting Disclosure [Text Block]
STOCKHOLDERS' EQUITY
Share-based Payment Arrangement [Text Block]