Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Accounts receivable, net Accrued Liabilities, Current Accrued expenses Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation and amortization Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss [Member] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Estimated Life (in years) Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Excess tax benefit of stock options exercised Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Reconciliation of net income to net cash provided by operating activities Advertising Costs, Policy [Policy Text Block] Advertising Costs Advertising Expense Advertising costs Allocated Share-based Compensation Expense Stock-based compensation expense Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of Allowance for Doubtful Activity Included in Accounts Receivable Net Allowance for Doubtful Accounts Receivable, Current Ending Balance Beginning Balance Allowance For Doubtful Accounts Receivable Write Offs Net Of Recoveries Allowance For Doubtful Accounts Receivable Write Offs Net Of Recoveries Write-offs, net of recoveries Allowance For Doubtful Accounts [Text Block] Allowance For Doubtful Accounts [Text Block] Allowance for Doubtful Accounts Amendment Flag Amendment Flag Amortization of Intangible Assets Amortization of intangible assets Amortization expense Amortization expense for purchased intangible assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Outstanding potential common shares excluded from computation of net income per share Assets Total assets Assets, Current Total current assets Assets, Current [Abstract] CURRENT ASSETS Assets, Fair Value Disclosure Assets fair value Assets held at foreign subsidiary and office location. Assets Held At Foreign Subsidiary And Office Location Property and equipment held at subsidiary and office locations outside of the United States of America, net Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Unrealized Losses Available-for-sale Debt Securities, Amortized Cost Basis Amortized Cost Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax Unrealized Gains (Losses) Available-for-sale Securities, Current Short-term marketable securities Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due within one year Available for sale securities debt maturities within two years fair value. Available For Sale Securities Debt Maturities Within Two Years Fair Value Due within two years Available-for-sale Securities, Debt Securities Fair Value Available-for-sale Securities [Table Text Block] Summary of Investment in Cash Equivalents and Marketable Securities Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] Award Type [Axis] Award Type [Axis] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business acquisition cost of acquired entity description of purchase price components. Business Acquisition Cost Of Acquired Entity Description Of Purchase Price Components [Table Text Block] Business Purchase Price Business Acquisition Cost Of Acquired Entity Purchase Price Net Business Acquisition Cost Of Acquired Entity Purchase Price Net Total purchase price Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Fair value of the shares issued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Number of shares of common stock issuable Business acquisition equity interests issued or issuable number of shares issued gross. Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued Gross Number of gross shares issued Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Pro Forma Earnings Per Share, Basic Pro forma net income per share, Basic Business Acquisition, Pro Forma Earnings Per Share, Diluted Pro forma net income per share, Diluted Business Acquisition, Pro Forma Information [Table Text Block] Pro Forma Financial Information Business acquisitions pro forma adjustment to amortization expense. Business Acquisitions Pro Forma Adjustment To Amortization Expense Proforma adjustments in amortization Business Acquisition, Pro Forma Net Income (Loss) Pro forma net income Business Acquisition, Pro Forma Revenue Pro forma total revenue Business Combination, Acquisition Related Costs Acquisition-related cost included in consolidated statements Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Share-based earn-out liability Business Combination, Contingent Consideration, Liability Fair value of share-based earn-out liability Business Combination Disclosure [Text Block] Business Acquisitions Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Operating loss from acquisition Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Revenues from acquisition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Current and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Deferred income tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property and equipment Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total purchase price Business Combinations [Abstract] Business Combinations [Abstract] Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed Acquisition related one-time Australian stamp duty tax Business combination share returned from escrow. Business Combination Share Returned From Escrow Number of shares retuned from escrow Business Combinations Policy [Policy Text Block] Business Combinations Business Description Policy [Text Block] Business Description [Policy Text Block] Business Description Cash Acquired from Acquisition Cash Acquired from Acquisition Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Cash Equivalents And Marketable Securities [Member] Cash Equivalents And Marketable Securities [Member] Cash Equivalents and Marketable Securities [Member] Commercial Paper [Member] Commercial Paper [Member] Commitments and Contingencies COMMITMENTS and CONTINGENCIES Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock [Member] Common Stock [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.001 par value; 55,000,000 shares authorized; 17,081,145 and 16,723,994 shares issued and outstanding, respectively Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Computer Equipment And Software [Member] Computer Equipment And Software [Member] Computer Equipment and Software [Member] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent consideration liability. Contingent Consideration Liability [Member] Contingent Consideration Liability [Member] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Contributions to related party [Member]. Contributions To Related Party [Member] Contributions To Related Party [Member] Corporate Debt Securities [Member] Corporate Bonds [Member] Cost of Revenue Cost of revenues Cost of Sales [Member] Cost of Revenues [Member] Current Federal Tax Expense (Benefit) Federal Current Fiscal Year End Date Current Fiscal Year End Date Current Foreign Tax Expense (Benefit) Foreign Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) State Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance Common stock reserved for future issuance Deferred Costs, Noncurrent Deferred costs, non-current Deferred Costs, Current Deferred costs Deferred Federal Income Tax Expense (Benefit) Federal Deferred Foreign Income Tax Expense (Benefit) Foreign Deferred Income Tax Assets, Net Net deferred tax assets Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred Deferred Tax Liabilities, Gross Total deferred tax liability Deferred Rent Credit, Current Deferred rent Deferred Rent Credit, Noncurrent Deferred rent, non-current Deferred Revenue, Current Deferred revenue Deferred Revenue, Noncurrent Deferred revenue, non-current Deferred State and Local Income Tax Expense (Benefit) State Deferred Tax Assets, Deferred Income Deferred operations Deferred tax assets depreciation amortization. Deferred Tax Assets Depreciation Amortization Depreciation and amortization Deferred Tax Assets, Gross Gross deferred tax asset Deferred Tax Assets, Net of Valuation Allowance Total net deferred tax asset Deferred Tax Assets, Net [Abstract] Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred income taxes, non-current Deferred Tax Assets, Operating Loss Carryforwards Unrecognized federal and state net operating losses Net operating loss and credit carryforwards Net operating losses Deferred Tax Assets, Other Other Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock-based compensation expense Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Accounts receivable allowances Deferred Tax Assets, Valuation Allowance Less: valuation allowance Deferred tax assets valuation allowance on state net operating loss and credit carry forwards. Deferred Tax Assets Valuation Allowance On State Net Operating Loss And Credit Carry Forwards Valuation allowance against our deferred tax assets Deferred tax liabilities depreciation amortization. Deferred Tax Liabilities Depreciation Amortization Depreciation and amortization Deferred Tax Liabilities, Net [Abstract] Deferred tax liability Deferred Tax Liabilities, Net, Noncurrent Deferred income tax liability Deferred Tax Liabilities, Undistributed Foreign Earnings Foreign operations Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Defined contribution plan employer matching contribution amount. Defined Contribution Plan Employer Matching Contribution Amount Employer matching contribution amount Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Defined benefit plan employer matching contribution percent Defined contribution plan maximum allowable contribution percentage by employee. Defined Contribution Plan Maximum Allowable Contribution Percentage By Employee Maximum allowable contribution by employee percentage Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Maximum annual contribution per employee, percent Denominator Denominator [Abstract] Denominator Depreciation, Depletion and Amortization Depreciation and amortization of property and equipment Developed Technology [Member] Developed Technology [Member] Developed Technology [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Document and Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Domestic Tax Authority [Member] Domestic Tax Authority [Member] Earnings Per Share [Abstract] Net income per share Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Diluted earnings per share Earnings Per Share, Policy [Policy Text Block] Net Income Per Share Earnings Per Share [Text Block] Net Income Per Share Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statutory blended income tax rate Effect of Exchange Rate on Cash and Cash Equivalents Effect of foreign currency exchange rate changes Employee-related Liabilities, Current Accrued compensation Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Unrecognized stock-based compensation, expected to be recognized, weighted average period Employee Stock Option [Member] Stock Options [Member] Employee stock purchase plan employees contribution. Employee Stock Purchase Plan Employees Contribution Employee stock purchase plan, employees contribution Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Registrant Name Entity Registrant Name Entity Voluntary Filers Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit from exercise of options to purchase common stock Expected life of connection. Expected Life Of Connection Expected life of customer relationship period Fair Value, Assets Measured on Recurring Basis [Table Text Block] Summary of Financial Assets Measured at Fair Value on a Recurring Basis Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Finite-lived Intangible Assets Acquired Estimated Fair Value Finite-Lived Intangible Assets, Amortization Expense, after Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2018 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Foreign Currency Translation Finite-Lived Intangible Assets, Gross Carrying Amount Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Net INTANGIBLE ASSETS, net Net Net Finite-Lived Intangible Asset, Useful Life Estimated useful lives of intangible assets Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Translation General and Administrative Expense General and administrative General and Administrative Expense [Member] General and Administrative [Member] Goodwill Balances, December 31 Balances, January 1 GOODWILL Goodwill, Acquired During Period Additions from business acquisitions Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets, net Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Intangible Assets Goodwill, Foreign Currency Translation Gain (Loss) Foreign currency translation Gross Profit Gross profit Gross profit Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of Long-Lived Assets Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Taxes Paid Cash paid for income taxes, net Income Tax Expense (Benefit) Total provision (benefit) for income taxes Income tax expense Income Tax Expense Benefit [Line Items] Income Tax Expense Benefit [Line Items] Income Tax Expense Benefit [Line Items] Income Tax Expense Benefit [Table] Income Tax Expense Benefit [Table] Income Tax Expense Benefit [Table] Income Tax, Policy [Policy Text Block] Income Taxes Income Tax Rate Reconciliation Permanent Differences Income Tax Rate Reconciliation Permanent Differences Permanent book/tax differences Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Change in valuation allowance Income tax reconciliation change in state deferred rate. Income Tax Reconciliation Change In State Deferred Rate Change in state deferred rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Tax impact of foreign activity Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Expected federal income tax at statutory rate Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Other Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount State income taxes, net of federal tax effect Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Research and development credit Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Accrued Liabilities Accrued expenses Increase (Decrease) in Deferred Charges Deferred costs Increase decrease in deferred rent. Increase Decrease In Deferred Rent Deferred rent Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Employee Related Liabilities Accrued compensation Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities, net of effects of acquisitions Increase (Decrease) in Other Operating Assets Other current assets and non-current assets Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Options to purchase common stock Interest Income (Expense), Net Interest income, net Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Financial Instruments Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Leadtec. Leadtec [Member] Leadtec [Member] Operating Leases, Rent Expense Rent expense charged to operations Lease Expiration Date Lease agreement expires, date Leasehold Improvements [Member] Leasehold Improvements [Member] Legal obligation to future commitments [Member]. Legal Obligation To Future Commitments [Member] Legal Obligation To Future Commitments [Member] Liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] CURRENT LIABILITIES Marketable Securities, Noncurrent MARKETABLE SECURITIES, non-current Marketable Securities, Policy [Policy Text Block] Marketable Securities Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Money Market Funds [Member] Money Market Funds [Member] Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Income (Loss) Attributable to Parent Net income Net income Net Income (Loss) Attributable to Parent [Abstract] Net income per share New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Noncash Investing and Financing Items [Abstract] Non-cash financing activities: Noncompete Agreements [Member] Non-competition Agreements [Member] Nonoperating Income (Expense) Total other income (expense), net Nonoperating Income (Expense) [Abstract] Other income (expense) Employee stock purchase plan - number of purchase periods during the calendar year. Number Of Offerings Number of offerings per year Number of options to extend term of lease. Number Of Options To Extend Lease Number of options to extend term of the lease Number of Reportable Segments Number of reportable segments Numerator. Numerator [Abstract] Numerator Office equipment and furniture. Office Equipment And Furniture [Member] Office Equipment and Furniture [Member] Officers' Compensation Officers compensation from the foundation Operating Expenses Total operating expenses Operating Expenses [Abstract] Operating expenses Operating Income (Loss) Income from operations Income from operations Operating Leases, Future Minimum Payments Due Operating leases, total Operating Leases, Future Minimum Payments Due, Next Twelve Months 2017 Operating Leases, Future Minimum Payments, Due in Five Years 2021 Operating Leases, Future Minimum Payments, Due in Four Years 2020 Operating Leases, Future Minimum Payments, Due in Three Years 2019 Operating Leases, Future Minimum Payments, Due in Two Years 2018 Operating Leases, Future Minimum Payments, Due Thereafter Thereafter Operating loss carry forward expirable unused amount. Operating Loss Carryforward Expirable Unused Amount Unused federal losses that will expire Operating Loss Carryforwards Net operating loss carry forwards for U. S. federal tax Operating Loss Carryforwards Expiration Date One Operating Loss Carryforwards Expiration Date One Expiration of net operating loss carryforwards Operating loss carryforwards limitations on use amount. Operating Loss Carryforwards Limitations On Use Amount Maximum annual limitation of federal net operating losses Options to extend term of lease on market rate determined at number of years. Options To Extend Term Of Lease On Market Rate Determined At Number Of Periods Options to extend the term of the lease, number of years Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] General Other Assets, Current Other current assets Other Assets, Noncurrent Other non-current assets Other Assets, Noncurrent [Abstract] OTHER ASSETS Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized loss on investments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Other Comprehensive Income (Loss), Tax [Abstract] Other comprehensive income (loss) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Tax on net unrealized gains on investment securities available for sale Other Income Other income Other Liabilities, Noncurrent [Abstract] OTHER LIABILITIES Other Nonoperating Income (Expense) Other income (expense), net Payments to Acquire Businesses, Gross Payments to acquire business Payments to Acquire Businesses, Net of Cash Acquired Cash Business acquistions, net of cash acquired Payments to Acquire Marketable Securities Purchases of marketable securities Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Pension and Other Postretirement Benefits Disclosure [Text Block] Retirement Savings Plan Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Preferred Stock, Value, Issued Preferred stock, $0.001 par value; 5,000,000 shares authorized; 0 shares issued and outstanding Proceeds from Sale and Maturity of Marketable Securities Maturities of marketable securities Proceeds from Stock Options Exercised Net proceeds from exercise of options to purchase common stock Proceeds from Stock Plans Net proceeds from employee stock purchase plan Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment, net Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Net PROPERTY AND EQUIPMENT, net Net, Total Property, Plant and Equipment, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Property and Equipment, Net Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Useful Life Estimated useful lives of property and equipment Property Plant and Equipment Useful Life and Values [Abstract] Property Plant and Equipment Useful Life and Values [Abstract] Property Plant and Equipment Useful Life and Values [Abstract] Provision for Doubtful Accounts Provision for doubtful accounts Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information [Text Block] Selected Quarterly Financial Data (Unaudited) Range [Axis] Range [Axis] Range [Domain] Range [Domain] Receivables [Abstract] Receivables [Abstract] Reclassification of losses on investments into earnings. Reclassification of Losses on Investments into Earnings Reclassification of losses on investments into earnings Regulatory Assets [Abstract] Regulatory Assets [Abstract] Regulatory Assets [Abstract] Related Party Transaction, Amounts of Transaction Contributions to the foundation Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Research and Development Expense Research and development Research and Development Expense [Member] Research and Development [Member] Research and Development Expense, Policy [Policy Text Block] Research and Development Research Tax Credit Carryforward [Member] Research and Development [Member] Restricted Stock [Member] Restricted Stock Award [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units [Member] Retained Earnings (Accumulated Deficit) Accumulated deficit Retained Earnings [Member] Accumulated Deficit [Member] Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Revenues Revenues Disclosure of accounting policy for risk and uncertainties. Risk And Uncertainties, Policy [Policy Text Block] Risk and Uncertainties Schedule Of Accounting Policies [Line Items] Schedule Of Accounting Policies [Line Items] Schedule Of Accounting Policies [Line Items] Schedule Of Accounting Policies [Table] Schedule Of Accounting Policies [Table] Schedule Of Accounting Policies [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] Schedule Of Business Acquisitions Purchase Price Allocation [Table] Schedule Of Business Acquisitions Purchase Price Allocation [Table] Schedule Of Business Acquisitions Purchase Price Allocation [Table] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Provision for Income Taxes Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Significant Components of Deferred Tax Assets (Liabilities) Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Components of Computation of Basic and Diluted Net Income Per Share Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of the Provision for Income Taxes to the Statutory Federal Rate Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Stock-Based Compensation Expense Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Estimated Fair Value of Purchased Intangible Assets and Estimated Useful Lives Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Future Amortization Expense for Intangible Assets Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table Text Block] Intangible Assets Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future Minimum Payments Under Operating Leases Schedule of Goodwill [Table Text Block] Schedule of Changes in Net Carrying Amount of Goodwill Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Quarterly Financial Information [Table Text Block] Summary of Unaudited Quarterly Statements of Comprehensive Income Data Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Estimated Fair Values of Assets Acquired, Net of Cash Acquired and Liabilities Assumed at Acquisition Date Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Restricted Stock Units and Restricted Stock Awards Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Stock Option Activity Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Fair Value Estimation of Common Stock Using Black-Scholes Option Pricing Model, Weighted-Average Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Weighted Average Fair Value Per Share of Options Granted, Assumptions Schedule Of Stockholders Equity [Line Items] Schedule Of Stockholders Equity [Line Items] Schedule Of Stockholders Equity [Line Items] Schedule Of Stockholders Equity [Table] Schedule Of Stockholders Equity [Table] Schedule Of Stockholders Equity [Table] Segment Reporting, Policy [Policy Text Block] Segment Information Selling and Marketing Expense Sales and marketing Selling and Marketing Expense [Member] Sales and Marketing [Member] Share-based Compensation Stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Restricted stock awards units vest over, period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Stock options vest, period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited, stock awards Forfeited, stock units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted, stock units Restricted common stock issued, stock awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted, Weighted Average Grant Date Fair Value Restricted common stock issued, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Stock awards, Outstanding, Ending Balance Stock awards, Outstanding, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average 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