Document and Entity Information [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] 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 of $222 and $209, respectively Accounts Receivable, Net, Current 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 Total current assets Assets, Current, Total Total current assets PROPERTY AND EQUIPMENT, net Property, Plant and Equipment, Net GOODWILL Goodwill INTANGIBLE ASSETS, net Finite-Lived 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 Total other assets Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES Liabilities, Current [Abstract] Capital lease obligations, current Capital Lease Obligations, Current 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 Total current liabilities Liabilities, Current, Total Total current liabilities OTHER LIABILITIES Other Liabilities, Noncurrent [Abstract] Deferred revenue, less current portion Deferred Revenue, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities, Total Total liabilities COMMITMENTS and CONTINGENCIES Commitments and Contingencies STOCKHOLDERS' EQUITY Stockholders' Equity Attributable to Parent [Abstract] 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, $0.001 par value; 55,000,000 shares authorized; 12,138,858 and 11,849,572 shares issued and outstanding, respectively Common Stock, Value, Issued 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) Stockholders' Equity Attributable to Parent, Total Ending balance Beginning balance Total stockholders' equity Total stockholders' equity Total stockholders' equity Liabilities and Equity Total liabilities and shareholder's equity Revenues Revenues Cost of revenues Cost of Revenue Gross profit Gross Profit Gross profit 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 Amortization of intangible assets Amortization of Intangible Assets Total operating expenses Operating Expenses, Total Total operating expenses Income from operations Operating Income (Loss) Income from operations Other income (expense) Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest expense Interest income Investment Income, Interest Other expense Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense), Total Total other expense, net Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income tax benefit (expense) Income Tax Expense (Benefit) Income tax benefit (expense) Net income Net Income (Loss) Attributable to Parent Net income Net income per Share [Abstract] Net income per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average common shares used to compute net income per share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Statement [Table] Statement [Line Items] Redeemable Convertible Preferred Series A Redeemable Convertible Preferred Series A [Member] Redeemable Convertible Preferred Series A Balance Ending balance, shares Beginning balance, shares Redeemable Convertible Preferred Series B Redeemable Convertible Preferred Series B [Member] Redeemable Convertible Preferred Series B Redeemable Convertible Preferred Series C Redeemable Convertible Preferred Series C [Member] Redeemable Convertible Preferred Series C Total Redeemable Convertible Preferred Stock Common Stock Additional Paid-in Capital Accumulated Deficit Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Repurchase of redeemable convertible preferred and common stock Stock Repurchased During Period, Value Repurchase of redeemable convertible preferred and common stock Repurchase of redeemable convertible preferred and common stock, shares Stock Repurchased During Period, Shares Repurchase of redeemable convertible preferred and common stock, shares Stock Issued During Period Shares Exercise of Warrant Shares Exercise of warrants, shares Exercise of warrants, shares Conversion of redeemable con- vertible preferred stock, shares Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of redeemable con- vertible preferred stock Stock Issued During Period, Value, Conversion of Convertible Securities Adjustments to Additional Paid in Capital Conversion of Warrants to Purchase Redeemable Convertible Preferred Stock Conversion of warrants to purchase redeemable convertible preferred stock Conversion of warrants to purchase redeemable convertible preferred stock Initial public offering, net of costs Stock Issued During Period, Value, New Issues Initial public offering, net of costs, shares Stock Issued During Period, Shares, New Issues Secondary Stock Offering Value Secondary stock offering, net of costs Secondary stock offering, net of costs Secondary Stock Offering Shares dsds Secondary stock offering, net of costs, shares Secondary stock offering, net of costs, shares Other Stockholders' Equity, Other Stock offering costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Excess tax benefit of stock options exercised Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income 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 taxes Deferred Income Tax Expense (Benefit) Depreciation and amortization of property and equipment Depreciation, Depletion and Amortization Provision for doubtful accounts Provision for Doubtful Accounts Stock-based compensation Share-based Compensation Change in Carrying Value of Preferred Stock Warrants Change in carrying value of preferred stock warrants Change in carrying value of preferred stock warrants Other Other Noncash Income (Expense) Other Changes in assets and liabilities, net of effect of acquisition Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Accounts receivable Deferred costs Increase (Decrease) in Deferred Charges Deferred costs Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Other assets Increase (Decrease) in Other Operating Assets Other 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 Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of Direct EDI Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Direct EDI Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings on line of credit Proceeds from Lines of Credit Payments on line of credit Repayments of Lines of Credit Payments on line of credit Payments on equipment loans Repayments of Other Debt Payments on equipment loans Payments on Term Loan Payments on term loan Payments on term loan Payments on term loan Payments of capital lease obligations Repayments of Long-term Capital Lease Obligations Payments of capital lease obligations Net proceeds from initial public offering Proceeds from Issuance Initial Public Offering Net proceeds from secondary stock offering Proceeds from Issuance of Common Stock Stock offering costs Payments of Stock Issuance Costs Stock offering costs Net proceeds from exercise of options to purchase common stock Proceeds from Stock Options Exercised Excess tax benefit from exercise of stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Payments for Repurchase of Equity Purchase of preferred and common stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid General Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] General and Financial Statement Components [Abstract] General and Financial Statement Components [Abstract] Acquisition of Direct EDI Business Combination Disclosure [Text Block] Acquisition of Direct EDI [Abstract] Acquisition of Direct EDI [Abstract] Financial Statement Components Additional Financial Information Disclosure [Text Block] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Fair Value of Financial Instruments [Abstract] Fair Value of Financial Instruments [Abstract] Debt Debt Disclosure [Text Block] Debt [Abstract] Debt [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) Stockholders' Equity Note Disclosure [Text Block] Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) [Abstract] Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) [Abstract] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation [Abstract] Stock-Based Compensation [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income Taxes [Abstract] Income Taxes [Abstract] Net Income per Share Earnings Per Share [Text Block] Employee Benefit Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plan [Abstract] Employee Benefit Plan [Abstract] Guarantees Guarantees [Text Block] Guarantees [Abstract] Guarantees [Abstract] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Selected Quarterly Financial Data (Unaudited) [Abstract] Selected Quarterly Financial Data (Unaudited) [Abstract] Subsequent Event (Unaudited) Subsequent Events [Text Block] Subsequent Event (Unaudited) [Abstract] Subsequent Event (Unaudited) [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Filer Category Entity Registrant Name Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Public Float Document Fiscal Period Focus Document Fiscal Year Focus Consolidated Balance Sheets [Abstract] Consolidated Statements of Operations [Abstract] Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) [Abstract] Consolidated Statements of Cash Flows [Abstract]