Document and Entity Information [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, less allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Deferred costs, current Deferred Costs, Current Deferred income taxes, current Deferred Tax Assets, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Assets, Current, Total Total current assets PROPERTY AND EQUIPMENT, net Property, Plant and Equipment, Net GOODWILL Goodwill Finite-Lived Intangible Assets, Net Net INTANGIBLE ASSETS, net OTHER ASSETS Other Assets, Noncurrent [Abstract] Deferred costs, net of current portion Deferred Costs, Noncurrent Deferred income taxes, net of current portion Deferred Tax Assets, Net, Noncurrent Other non-current assets Other Assets, Noncurrent Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Accounts payable Accounts Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Accrued expenses and other current liabilities Accrued Liabilities, Current Deferred revenue, current Deferred Revenue, Current OTHER LIABILITIES Other Liabilities, Noncurrent [Abstract] Deferred revenue, less current portion Deferred Revenue, Noncurrent COMMITMENTS and CONTINGENCIES Commitments and Contingencies Preferred stock, $0.001 par value; 5,000,000 shares authorized; 0 shares issued and outstanding Preferred Stock, Value, Issued Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common Stock, Value, Issued Common stock, $0.001 par value; 55,000,000 shares authorized; 12,386,417 and 12,138,858 shares issued and outstanding, respectively Common stock, par value 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 Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Revenues Revenues Cost of revenues Cost of Revenue Operating expenses Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Research and development Research and Development Expense General and administrative General and Administrative Expense Other income (expense) Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Net income (loss) Net Income (Loss) per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding, basic Basic Weighted Average Number of Shares Outstanding, Diluted Weighted average common shares outstanding, diluted Diluted Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Reconciliation of net income to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Deferred Income Tax Expense (Benefit) Deferred income taxes Depreciation and amortization of property and equipment Depreciation, Depletion and Amortization Provision for doubtful accounts Provision for Doubtful Accounts Share-based Compensation Total stock-based compensation expense Stock-based compensation Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Deferred Charges Deferred costs Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Accounts payable Increase (Decrease) in Accounts Payable Accrued compensation and benefits Increase (Decrease) in Employee Related Liabilities Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Repayments of Long-term Capital Lease Obligations Payments of capital lease obligations Net proceeds from exercise of options to purchase common stock Proceeds from Stock Options Exercised Excess tax benefit from exercise of options to purchase common stock Excess Tax Benefit from Share-based Compensation, Financing Activities Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period General Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] General and Financial Statement Components [Abstract] Financial Statement Components Additional Financial Information Disclosure [Text Block] Line of Credit Debt Disclosure [Text Block] Line of Credit [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies [Abstract] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income Taxes [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Filer Category Entity Registrant Name Document Fiscal Period Focus Document Fiscal Year Focus Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Statements of Operations [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Use of Estimates, Policy [Policy Text Block] Use of Estimates Customer Relationships [Member] Subscriber relationships [Member] Noncompete Agreements [Member] Non-competition agreements [Member] Line Of Credit (Textual) [Abstract] Line of Credit (Textual) [Abstract] Line of credit. Revolving credit facility, maturity date Line of Credit Facility, Expiration Date Borrowings outstanding Line of Credit Facility, Amount Outstanding Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets [Line Items] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future minimum payments under operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Future minimum payments under operating leases Operating Leases, Future Minimum Payments Due, Next Twelve Months Remainder of 2012 Operating Leases, Future Minimum Payments, Due in Two Years 2013 Operating Leases, Future Minimum Payments, Due in Three Years 2014 Operating Leases, Future Minimum Payments, Due in Four Years 2015 Operating Leases, Future Minimum Payments, Due in Five Years 2016 Operating Leases, Future Minimum Payments, Due Thereafter Thereafter Commitments and Contingencies (Textual) [Abstract] Commitments and Contingencies (Textual) [Abstract] Commitments and contingencies. Stock-based compensation expense Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Stock option activity Cost of Sales [Member] Cost of revenues [Member] Selling and Marketing Expense [Member] Sales and marketing [Member] Research and Development Expense [Member] Research and development [Member] General and Administrative Expense [Member] General and administrative [Member] Weighted Average Exercise Price, Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options, Outstanding at June 30, 2012 Options, Outstanding at December 31, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Weighted Average Exercise Price, Outstanding at December 31, 2011 Weighted Average Exercise Price, Outstanding at June 30, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life (in years) Stock-Based Compensation (Textual) [Abstract] Stock-based compensation. 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 By Report Line [Axis] Employee Service Share Based Compensation Allocation Of Recognized Period Costs Report Line [Domain] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward Stock option activity Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract] Weighted average fair value per share of options granted Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Total outstanding options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted restricted stock units Income Taxes (Textual) [Abstract] Income Taxes (Textual) [Abstract] Income taxes. Net Income per Share (Textual) [Abstract] Net Income (Loss) per Share (Textual) [Abstract] Net income per share. Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Weighted Average Number of Shares Outstanding, Diluted [Abstract] Payments of Stock Issuance Costs Stock offering costs Net Income (Loss) Attributable to Parent [Abstract] Net income (loss) per share Numerator [Abstract] Numerator. Numerator Denominator [Abstract] Denominator Denominator Earnings Per Share, Basic [Abstract] Payment of Cash or Irrevocable Letter of Credit Landlord cash or an irrevocable letter of credit Payment of cash or irrevocable letter of credit. Other Nonoperating Income (Expense) Other expense Weighted average common shares used to compute net income (loss) per share Significant Accounting Policies [Text Block] Significant Accounting Policies Business Description and Accounting Policies [Text Block] Business Description Financial Statement Components (Textual) [Abstract] Financial statement components. Financial Statement Components (Textual) [Abstract] Number of Options to Extend Term of Lease Number of options to extend term of the lease. Number of options to extend term of the lease Options to Extend Term of Lease on Market Rate Determined at Number of Years Options to extend the term of the lease, number of years Options to extend term of lease on market rate determined at number of years. Lease Expiration Date Lease agreement expire, date Options, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighted Average Exercise Price, Forfeited Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Weighted-average volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Weighted-average risk-free interest rate Shares available for grant 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, Award Vesting Period Stock options vest, period Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award Stock options contractual term, from the date of grant Weighted average exercise price Components of the computation of basic and diluted net income (loss) per share Restricted Stock Units Vest Over Period Restricted stock units vest over, period Restricted stock units vest over period Operating Leases, Future Minimum Payments Due Operating leases, total Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Outstanding potential common shares, anti-dilutive New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Liabilities, Current, Total Total current liabilities Liabilities, Total Total liabilities Stockholders' Equity Attributable to Parent, Total Total stockholders' equity Liabilities and Equity Total liabilities and stockholder's equity Gross Profit Gross profit Operating Expenses, Total Total operating expenses Operating Income (Loss) Income (loss) from operations Nonoperating Income (Expense), Total Total other income (expense), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income Tax Expense (Benefit) Income tax expense Provision for income taxes Net Income (Loss) Attributable to Parent Net income Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Finite-Lived Intangible Assets, Gross Carrying Amount Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Granted Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Direct EDI Stockholders' Equity Attributable to Parent [Abstract] STOCKHOLDER'S EQUITY Liabilities, Current [Abstract] CURRENT LIABILITIES Net income (loss) per share Schedule of Finite-Lived Intangible Assets [Table Text Block] Components of intangible assets Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Weighted average fair value per share of options granted