Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accrued Expenses Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Accounts receivable, net Accrued Expenses And Other Current Liabilities [Line Items] Accrued Expenses And Other Current Liabilities [Line Items] Accrued Expenses And Other Current Liabilities [Line Items] Accrued Expenses And Other Current Liabilities [Table] Accrued Expenses And Other Current Liabilities [Table] Accrued Expenses And Other Current Liabilities [Table] Accrued Liabilities, Current Accrued expenses Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation and amortization Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [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 Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of Allowance for Doubtful Activity Including in Accounts Receivable Net Allowance for Doubtful Accounts Receivable, Current Ending Balance Beginning Balance Allowance for Doubtful Accounts Receivable, Recoveries Recoveries Allowance for Doubtful Accounts Receivable, Write-offs Write-offs 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 expense Amortization of intangible assets Amount borrowed from line of credit to fund cash paid for business acquisition. Amount Borrowed From Line Of Credit To Fund Cash Paid For Business Acquisition Amount borrowed from line of credit to fund cash paid for business acquisition 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 held at foreign subsidiary and office location. Assets Held At Foreign Subsidiary And Office Location Property and equipment, net 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 Borrowing base as percentage of monthly recurring revenue. Borrowing Base As Percentage Of Monthly Recurring Revenue Borrowing base in compliance with eligible monthly recurring revenue 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 Common stock shares, issued Number of Shares of common stock issued for acquisition 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] Unaudited Pro Forma Financial Information 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, Consideration Transferred, Equity Interests Issued and Issuable SPS Commerce, Inc. common stock 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 derived from customers 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, 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 Combinations Policy [Policy Text Block] Business Combinations Business Description and Accounting Policies [Text Block] Business Description 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 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 issued and sold 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; 16,348,747 and 16,092,121 shares issued and outstanding, respectively Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Computer equipment and purchased software. Computer Equipment And Purchased Software [Member] Computer Equipment and Purchased Software [Member] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Cost of Revenue Cost of revenues Cost of Sales [Member] Cost of revenues [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] 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 Customer Relationships [Member] Subscriber relationships [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Line of Credit Debt Instrument, Basis Spread on Variable Rate Applicable margin based on net working capital 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 Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred Deferred Rent Credit, Current Deferred rent Deferred Rent Credit, Noncurrent Deferred rent, non-current Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Axis] Deferred Revenue [Domain] Deferred Revenue [Domain] Deferred Revenue, Current Deferred revenue Deferred Revenue, Noncurrent Deferred revenue, non-current Deferred State and Local Income Tax Expense (Benefit) State Deferred tax assets accrued expense current. Deferred Tax Assets Accrued Expense Current Accrued expenses Deferred tax assets allowance for doubtful accounts current. Deferred Tax Assets Allowance For Doubtful Accounts Current Accounts receivable allowance Deferred tax assets deferred operation non current. Deferred Tax Assets Deferred Operation Non Current Deferred operations Deferred tax assets depreciation and amortization non current. Deferred Tax Assets Depreciation And Amortization Non Current Depreciation and amortization Deferred Tax Assets, Gross, Current Total current deferred tax asset Deferred Tax Assets, Gross, Noncurrent Total non-current deferred tax asset Deferred Tax Assets, Net, Current Net current deferred tax asset Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Classification [Abstract] Current Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred income taxes, non-current Net non-current deferred tax asset Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Classification [Abstract] Non-current Deferred tax assets net operating loss and credit tax carry forwards current. Deferred Tax Assets Net Operating Loss And Credit Tax Carry Forwards Current Current net operating loss and credit carryforwards Deferred tax assets net operating loss and credit tax carryforwards non current. Deferred Tax Assets Net Operating Loss And Credit Tax Carryforwards Non Current Net operating loss and credit carryforwards Deferred Tax Assets, Operating Loss Carryforwards Federal net operating losses Deferred tax assets other non current. Deferred Tax Assets Other Noncurrent Other Deferred tax assets stock expense current. Deferred Tax Assets Stock Expense Current Stock-based compensation expense Deferred tax assets, stock expense, non current. Deferred Tax Assets Stock Expense Non Current Stock-based compensation expense Deferred Tax Assets, Valuation Allowance, Current Valuation allowance Deferred Tax Assets, Valuation Allowance, Noncurrent 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 deferred operation current. Deferred Tax Liabilities Deferred Operation Current Deferred operations Deferred Tax Liabilities, Gross, Current Total current deferred tax liability Deferred Tax Liabilities, Net, Noncurrent Total non-current deferred tax liability Deferred Tax Liabilities Related To Foreign Operations Deferred Tax Liabilities Related To Foreign Operations Foreign operations Deferred tax liabilities related to foreign operations non-current. Deferred Tax Liabilities Related To Foreign Operations Non-Current 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 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 Edifice. Edifice [Member] Edifice [Member] 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 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 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2016 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 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 Finite-Lived Intangible Asset, Useful Life Estimated useful lives of intangible assets Fixed charge coverage ratio. Fixed Charge Coverage Ratio Fixed Charge Coverage Ratio 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 GOODWILL Goodwill, Acquired During Period Change in goodwill from acquisitions during the period 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 Gross Profit Gross profit Gross profit Impairment of Intangible Assets, Finite-lived Impairment of non-competition agreements Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of Long-Lived Assets Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, 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 Income Taxes Receivable, Current Income tax receivable included in prepaid expenses and other current assets 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, Prior Year Income Taxes, Amount Prior year true up 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 Liabilities 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 Current Assets Other current assets Increase (Decrease) in Other Noncurrent Assets Other non-current assets Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Options to purchase common stock Interest Paid Cash paid for interest Investment Income, Interest Interest income, net 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] Liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] CURRENT LIABILITIES Long-term Line of Credit Borrowings outstanding revolving credit agreement Line of Credit Facility, Expiration Date Revolving credit facility, maturity date Line of credit facility increase in interest rate subject to default. Line Of Credit Facility Increase In Interest Rate Subject To Default Applicable interest rate Line of Credit Facility, Interest Rate Description Interest rate description Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Revolving credit facility, amount Line of Credit Facility, Remaining Borrowing Capacity Borrowings available revolving credit agreement Line of Credit Facility [Table] Line of Credit Facility [Table] Line of credit to fund cash paid for acquisition. Line Of Credit To Fund Cash Paid For Acquisition Amount borrowed from existing line of credit for payment of business acquisition London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [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 expense, net Nonoperating Income (Expense) [Abstract] Other income (expense) Employee stock purchase plan - number of purchase periods during the calendar year. Number Of Offerings During Year Number of offerings per year Number of options to extend term of lease. Number Of Options To Extend Term Of 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] 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 2015 Operating Leases, Future Minimum Payments, Due in Five Years 2019 Operating Leases, Future Minimum Payments, Due in Four Years 2018 Operating Leases, Future Minimum Payments, Due in Three Years 2017 Operating Leases, Future Minimum Payments, Due in Two Years 2016 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 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), 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 Liabilities, Noncurrent [Abstract] OTHER LIABILITIES Other Nonoperating Income (Expense) Other expense Payables and Accruals [Abstract] Payables and Accruals [Abstract] Payments of Stock Issuance Costs Underwriting discounts and commissions and legal, accounting and other fees Stock offering costs Payments to Acquire Businesses, Gross Assets acquired in cash Cash Payments to Acquire Businesses, Net of Cash Acquired Business acquisitions, net of cash acquired Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Pension and Other Postretirement Benefits Disclosure [Text Block] Retirement Savings Plan Employee stock purchase plan - common stock purchase price as a percentage of market value. Percentage Of Common Stock On Fair Market Value Percentage of common stock on fair market value 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 Prime Rate [Member] Prime Rate [Member] Proceeds from Issuance of Common Stock Net proceeds from issue of shares Net proceeds from stock offerings Proceeds from Lines of Credit Borrowings on line of credit 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] Recorded Unconditional Purchase Obligation Due in Next Twelve Months Future payments for next fiscal year Regulatory Assets [Abstract] Regulatory Assets [Abstract] Regulatory Assets [Abstract] Repayments of Lines of Credit Payments on line of credit Repayments of Long-term Capital Lease Obligations Payments of capital lease obligations 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 Revolving Credit Facility [Member] Revolving Credit Facility [Member] Disclosure of accounting policy for risk and uncertainties. Risk And Uncertainties 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 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 Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Schedule of 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 and Liabilities Assumed at Acquisition Date 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] Weighted Average Fair Value Per Share, Employee Stock Purchase Plan, 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 Stock-based compensation expense 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 Grant Date Fair Value Weighted average grant date fair value, Outstanding, Ending Balance Weighted average grant date fair value, Outstanding, Beginning Balance Share based compensation arrangement by share based payment award equity instruments other than options vested and unissued in period. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested And Unissued In Period Number of RSU's vested and not issued during the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Restrictions lapsed, stock awards Vested, stock units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Restrictions lapsed, Weighted Average Grant Date Fair Value Vested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Additional shares were authorized under 2010 Equity Incentive Plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Options, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average fair value per share of options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options Outstanding, Ending balance Options Outstanding, Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price, Outstanding, Ending Balance Weighted Average Exercise Price, Outstanding, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award Employee stock purchase plan, shares purchased Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award Stock options contractual term, from the date of grant Share based compensation arrangement by share based payment award terms of stock option. Share Based Compensation Arrangement By Share Based Payment Award Terms Of Stock Option Stock options contractual term range Equity Award [Domain] Equity Award [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Forfeited Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Granted Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation Share Price Issue price of shares Shares issued to underwriters under over allotment options. Shares Issued To Underwriters Under Over Allotment Options Shares issued to underwriters under over allotment options Shares, Outstanding Ending balance, shares Beginning balance, shares 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 Software License Arrangement [Member] Software Licenses Agreement [Member] State and Local Jurisdiction [Member] State and Local Jurisdiction [Member] Equity Components [Axis] Equity Components [Axis] Statement [Line Items] Statement [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Stock Compensation Plan [Member] Equity Incentive Plan [Member] Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total stockholders' equity Stockholders' Equity Attributable to Parent [Abstract] STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Stock Issued Common stock issued for business acquisitions Stock Issued During Period, Shares, Acquisitions Stock issued for acquisition, Shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Employee stock purchase plan, shares Stock Issued During Period Shares Restricted Stock and Stock Options Exercised Stock Issued During Period Shares Restricted Stock and Stock Options Exercised Exercise of stock options and issuance of restricted stock, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options, shares Options, Exercised Stock Issued During Period, Value, Acquisitions Stock issued for acquisition Stock Issued During Period, Value, Employee Stock Purchase Plan Employee stock purchase plan Stock Issued During Period Value Restricted Stock and Stock Options Exercised Stock Issued During Period Value Restricted Stock and Stock Options Exercised Exercise of stock options and issuance of restricted stock Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Stock offering, net of costs, shares. Stock Offering Net Of Costs Shares Stock offering, net of costs, shares Stock offering, net of costs. Stock Offering Net Of Costs Value Stock offering, net of costs Subscriber Relationships [Member] Subscriber Relationships [Member] Subscriber Relationships [Member] Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Tax Credit Carryforward, Amount Research and development credit carryforwards Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward Beginning Expiration Year Tax Credit Carryforward Beginning Expiration Year Research and development credit expire date Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Technology And Other [Member] Technology And Other [Member] Technology and Other [Member] Text Block [Abstract] Text Block [Abstract] Trade and Other Accounts Receivable, Policy [Policy Text Block] Accounts Receivable Trading Symbol Trading Symbol Two Thousand Ten [Member] Two Thousand Ten [Member] 2010 [Member] Unrecognized Tax Benefits Unrecognized tax benefits Use of Estimates, Policy [Policy Text Block] Use of Estimates Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted average common shares outstanding, diluted Weighted Average Number of Shares, Employee Stock Ownership Plan Shares Not Committed to be Released Employee stock purchase plan Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares used to compute net income per share Weighted Average Number of Shares Outstanding, Basic Basic Weighted average common shares outstanding, basic Weighted Average Number of Shares, Restricted Stock Restricted stock units