Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A convertible preferred stock [Member] Series A Preferred Stock [Member] Series B convertible preferred stock [Member] Series B Preferred Stock [Member] Series C convertible preferred stock [Member] Series C Preferred Stock [Member] Statement [Line Items] Statement [Line Items] Allowance for Doubtful Accounts Receivable Allowance for Doubtful Accounts Receivable Preferred Stock, Par or Stated Value Per Share 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 Preferred Stock, Liquidation Preference, Value Preferred Stock, Liquidation Preference, Value Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Commitments and Contingencies Disclosure [Abstract] Leased Assets [Table] Leased Assets [Table] Leased Assets [Table] Recorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Recorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Maintenance and Support [Member] Maintenance and Support [Member] Maintenance and Support [Member] Category of Item Purchased [Axis] Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Capital Addition Purchase Commitments [Member] Capital Addition Purchase Commitments [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Capital Lease Obligations [Member] Capital Lease Obligations [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Leased Assets [Line Items] Leased Assets [Line Items] [Line Items] for Leased Assets [Table] Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Face Amount Debt Instrument, Face Amount Recorded Unconditional Purchase Obligation Recorded Unconditional Purchase Obligation Operating Leases, Rent Expense Operating Leases, Rent Expense Deferred Rent Credit, Noncurrent Deferred Rent Credit, Noncurrent Other Income and Expenses [Abstract] Other Income (Expense), Net Other Income and Other Expense Disclosure [Text Block] Sales and excise tax payable, current Sales and Excise Tax Payable, Current Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Line of Credit [Member] Line of Credit [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit, Number of Monthly Payments Line of Credit, Number of Monthly Payments Line of Credit, Number of Monthly Payments Line of Credit Facility, Increase in Maximum Borrowing Capacity Line of Credit Facility, Increase in Maximum Borrowing Capacity Line of Credit Facility, Increase in Maximum Borrowing Capacity Line of Credit Facility, Amount Outstanding Line of Credit Facility, Amount Outstanding Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Nemean Networks, LLC Nemean Networks, LLC [Member] Nemean Networks, LLC [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Consideration for acquisition Business Combination, Consideration Transferred Non-contingent payment Business Acquisition, Cost of Acquired Entity, Cash Paid Non-contingent payment, number of shares Business Acquisition, Cost of Acquired Entity, Equity Interests Issued and Issuable, Number of Shares Business Acquisition, Cost of Acquired Entity, Equity Interests Issued and Issuable, Number of Shares Amount Paid to Maintain Exclusive License Amount Paid to Maintain Exclusive License Amount Paid to Maintain Exclusive License Amortization Period of Exclusive License Payment Amortization Period of Exclusive License Payment Amortization Period of Exclusive License Payment Number of years for payments on patent license Number of Years for Payments on Patent License Number of Years for Payments on Patent License Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Series A convertible preferred stock: $0.001 par value; 48,079,860 shares authorized; 4,766,543 shares issued and outstanding at September 30, 2012 and December 31, 2011; aggregate liquidation preference-$28,774 Series B convertible preferred stock: $0.001 par value; 110,314,114 shares authorized; 11,031,387 shares issued and outstanding at September 30, 2012 and December 31, 2011; aggregate liquidation preference—$28,862 Series C convertible preferred stock: $0.001 par value; 18,006,026 shares authorized; 1,799,328 shares issued and outstanding at September 30, 2012 and December 31, 2011; aggregate liquidation preference— $6,631 Assets [Abstract] Assets [Abstract] Current assets: Assets, Current [Abstract] Cash Cash Accounts receivable, net of allowance of $355 and $230 as of September 30, 2012 and December 31, 2011, respectively Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Other noncurrent assets Other Assets, Noncurrent Total assets Assets Liabilities, Convertible Preferred Stock and Stockholders’ Equity (Deficit) Liabilities and Equity [Abstract] Current Liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Deferred revenues, current Deferred Revenue, Current Capital lease obligations, current Capital Lease Obligations, Current Total current liabilities Liabilities, Current Deferred revenues, noncurrent Deferred Revenue, Noncurrent Income taxes payable, noncurrent Accrued Income Taxes, Noncurrent Other noncurrent liabilities Other Liabilities, Noncurrent Capital lease obligations, noncurrent Capital Lease Obligations, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments and Contingencies Convertible preferred stock: Convertible Preferred Stock [Abstract] Convertible Preferred Stock [Abstract] Convertible preferred stock Preferred Stock, Value, Issued Stockholders' Equity (Deficit): Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.001 par value; 299,900,000 shares authorized; — 5,964,621 and 5,300,288 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders' equity (deficit) Stockholders' Equity Attributable to Parent Total liabilities, convertible preferred stock and stockholders' equity (deficit) Liabilities and Equity Property, Plant and Equipment [Abstract] Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Employee Stock and Benefit Plans [Abstract] Employee Stock and Benefit Plans [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Stock Options [Member] Stock Options [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Goodwill and Intangible Assets Disclosure [Abstract] Remainder of 2012 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2013 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2014 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2017 and thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Net Book Value Finite-Lived Intangible Assets, Net Accounting Changes and Error Corrections [Abstract] Restatement of Previously Issued Financial Statements Accounting Changes and Error Corrections [Text Block] Schedule of shares reserved for future issuance Schedule of Shares Reserved for Future Issuance [Table Text Block] Schedule of Shares Reserved for Future Issuance [Table Text Block] Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Segment Reporting [Abstract] Revenues by geographic area Schedule of Segment Reporting Information, by Segment [Table Text Block] Business Combination Business Combination Disclosure [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Future Minimum Lease Payments for Capital and Operating Leases Schedule of Future Minimum Lease Payments for Operating and Capital Leases [Table Text Block] Schedule of Future Minimum Lease Payments for Operating and Capital Leases [Table Text Block] Statement of Other Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Foreign currency translation gain (loss), net of zero tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Other comprehensive income (loss), net Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accounting Policies [Abstract] The company and qualitative disclosure about market risk [Table] Derivative [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Software and software development costs Software and Software Development Costs [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred stock Preferred Stock [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer concentration risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts receivable Accounts Receivable [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Forward contracts Forward Contracts [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Scanner appliances Scanner appliances [Member] Scanner appliances [Member] The company and qualitative disclosure about market risk [Line Items] Derivative [Line Items] Conversion of stock, amount converted Conversion of Stock, Amount Converted Concentration risk, number of customers Concentration risk, number of customers Concentration risk, number of customers Concentration risk, percentage Concentration Risk, Percentage Deferred offering costs Deferred Offering Costs Property, plant and equipment, useful Llfe Property, Plant and Equipment, Useful Life Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Capitalized development costs Finite-Lived Intangible Assets, Gross Derivative, number of instruments held Derivative, Number of Instruments Held Derivative, notional amount Derivative, Notional Amount Foreign currency contract, asset, fair value disclosure Foreign Currency Contract, Asset, Fair Value Disclosure Derivative instruments not designated as hedging instruments, loss Derivative Instruments Not Designated as Hedging Instruments, Loss Foreign currency transaction gain, before tax Foreign Currency Transaction Gain, before Tax Advertising expense Advertising Expense Foreign currency transaction gain (loss), before tax Foreign Currency Transaction Gain (Loss), before Tax Stockholders' equity, reverse stock split Stockholders' Equity, Reverse Stock Split Stockholders' equity note, stock split, conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Income Statement [Abstract] Revenues [Abstract] Revenues [Abstract] Revenues Revenues Cost of revenues Cost of Revenue Gross profit Gross Profit Operating Expenses [Abstract] Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Other income (expense), net [Abstract] Other Income (Expense), Net [Abstract] Other Income (Expense), Net [Abstract] Interest expense Interest Expense Interest income Investment Income, Interest Other income (expense), net Other Nonoperating Income (Expense) Total other income (expense), net Nonoperating Income (Expense) Income before provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income Net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Net income per share attributable to common stockholders: [Abstract] Earnings Per Share [Abstract] Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Weighted average shares used in computing net income per share attributable to common stockholders: [Abstract] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Stock-based employee compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Fair value assumptions of options granted to employees Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Depreciation, Depletion and Amortization Bad debt expense Provision for Doubtful Accounts Loss on disposal of property and equipment Gain (Loss) on Sale of Property Plant Equipment Stock-based compensation Share-based Compensation Non-cash interest expense Other Noncash Expense Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Deferred revenues Increase (Decrease) in Deferred Revenue Income taxes payable Increase (Decrease) in Income Taxes Payable Other noncurrent liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment, net Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Principal payments under capital lease obligations Repayments of Long-term Capital Lease Obligations Payment of consideration related to acquisition Payments to Acquire Businesses, Net of Cash Acquired Proceeds from exercise of stock options Proceeds from Stock Options Exercised Payments for offering costs in connection with initial public offering Payments of Stock Issuance Costs Proceeds from issuance of Series C Preferred Stock Proceeds from Issuance of Preferred Stock and Preference Stock Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net increase in cash Cash and Cash Equivalents, Period Increase (Decrease) Cash at beginning of period Cash at end of period Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] Deferred offerings costs incurred but not yet paid Deferred Offerings Costs Incurred But Not Yet Paid Deferred Offerings Costs Incurred But Not Yet Paid Issuance of common stock for acquisition of license Stock Issued The Company and Summary of Significant Accounting Policies Business Description and Accounting Policies [Text Block] Employee Stock and Benefit Plans Compensation and Employee Benefit Plans [Text Block] Equity Incentive Plan Annual Increase Feature [Axis] Equity Incentive Plan Annual Increase Feature [Axis] Equity Incentive Plan Annual Increase Feature [Axis] Equity Incentive Plan Annual Increase Feature [Domain] Equity Incentive Plan Annual Increase Feature [Domain] [Domain] for Equity Incentive Plan Annual Increase Feature [Axis] Increase of Number of Shares Option [Member] Increase of Number of Shares Option [Member] Increase of Number of Shares Option [Member] Increase of Percentage of Shares Outstanding Option [Member] Increase of Percentage of Shares Outstanding Option [Member] Increase of Percentage of Shares Outstanding Option [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2000 Equity Incentive Plan [Member] 2000 Equity Incentive Plan [Member] 2000 Equity Incentive Plan [Member] 2012 Equity Incentive Plan [Member] 2012 Equity Incentive Plan [Member] 2012 Equity Incentive Plan [Member] Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Award strike price as a percentage of market value Share-based Compensation Arrangement by Share-based Payment Award, Award Strike Price as a Percentage of Market Value Share-based Compensation Arrangement by Share-based Payment Award, Award Strike Price as a Percentage of Market Value Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Term of award Share-based Compensation Arrangement by Share-based Payment Award, Term of Award Share-based Compensation Arrangement by Share-based Payment Award, Term of Award Number of shares subject to repurchase (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Subject to Repurchase Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Subject to Repurchase Number of unvested shares repurchased (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Unvested Shares Repurchased Share-based Compensation Arrangement by Share-based Payment Award, Number of Unvested Shares Repurchased Liability for options early exercised Share-based Compensation Arrangement by Share Based Payment Award, Liability for Options Early Exercised Share-based Compensation Arrangement by Share Based Payment Award, Liability for Options Early Exercised Equity incentive plan annual increase (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Shares Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Shares Equity incentive plan, annual increase, percent of shares outstanding Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Percent of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Annual Increase, Percent of Shares Outstanding Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule of Other Nonoperating Income (Expense) Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Existing technology Existing technology [Member] Existing technology [Member] Existing technology Developed Technology Rights [Member] Patent license Patents [Member] Non-competition agreements and other Non-competition Agreements and Other Intangible Assets [Member] [Member] Non-competition Agreements and Other Intangible Assets [Member] [Member] Intangible Assets [Line Items] Goodwill [Line Items] Estimated Lives Cost Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets not subject to amortization Indefinite-Lived Intangible Assets (Excluding Goodwill) Total intangible assets, net Amortization of intangible assets Amortization of Intangible Assets Net Income Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Carrying value of intangible assets Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Intangible assets future periods amortization expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Basis of presentation Basis of Accounting, Policy [Policy Text Block] Principles of consolidation Consolidation, Policy [Policy Text Block] Use of estimates Use of Estimates, Policy [Policy Text Block] Convertible preferred stock Stockholders' Equity Note, Redeemable Preferred Stock, Issue, Policy [Policy Text Block] Concentration of credit risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Cash Cash and Cash Equivalents, Policy [Policy Text Block] Accounts receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Property and equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Impairment of long-lived assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Goodwill and intangible assets Goodwill and Intangible Assets, Policy [Policy Text Block] Software development cost Research, Development, and Computer Software, Policy [Policy Text Block] Derivative financial instruments Derivatives, Reporting of Derivative Activity [Policy Text Block] Share-based compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Revenue recognition Revenue Recognition, Policy [Policy Text Block] Advertising expenses Advertising Costs, Policy [Policy Text Block] Income taxes Income Tax, Policy [Policy Text Block] Other comprehensive income (loss) Comprehensive Income, Policy [Policy Text Block] Foreign currency translation and transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Fair value measurement Fair Value Measurement, Policy [Policy Text Block] Net income per share attributable to common stockholders Earnings Per Share, Policy [Policy Text Block] Recent accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Remainder of 2012 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2013 Operating Leases, Future Minimum Payments, Due in Two Years 2014 Operating Leases, Future Minimum Payments, Due in Three Years 2015 Operating Leases, Future Minimum Payments, Due in Four Years 2016 Operating Leases, Future Minimum Payments, Due in Five Years 2017 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total mimimum lease payments Operating Leases, Future Minimum Payments Due Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Remainder of 2012 Capital Leases, Future Minimum Payments Due, Next Twelve Months 2013 Capital Leases, Future Minimum Payments Due in Two Years 2014 Capital Leases, Future Minimum Payments Due in Three Years 2015 Capital Leases, Future Minimum Payments Due in Four Years 2016 Capital Leases, Future Minimum Payments Due in Five Years 2017 and thereafter Capital Leases, Future Minimum Payments Due Thereafter Total minimum lease payments Capital Leases, Future Minimum Payments Due Less amount representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Present value of minimum payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Less current portion Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] As previously reported Scenario, Previously Reported [Member] Effect of restatement Restatement Adjustment [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Accrued income taxes, noncurrent Segment Information and Information about Geographic Area Segment Reporting Disclosure [Text Block] Effective tax rate Effective Income Tax Rate, Continuing Operations Tax benefit from reduction of liability for uncertain tax positions Income Tax Expense (Benefit), Continuing Operations, Adjustment to Unrecognized Tax Benefits Income Tax Expense (Benefit), Continuing Operations, Adjustment to Unrecognized Tax Benefits Unrecognized tax benefits Unrecognized Tax Benefits Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Offering Source [Axis] Offering Source [Axis] Offering Source [Axis] Offering Source [Domain] Offering Source [Domain] [Domain] for Offering Source [Axis] IPO [Member] IPO [Member] IPO Overallotment [Member] IPO Overallotment [Member] IPO Overallotment [Member] Common Stock [Member] Common Stock [Member] Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Financing [Axis] Financing [Axis] Financing [Domain] Financing [Domain] Issuance of Equity [Member] Issuance of Equity [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Shares Sold in Initial Public Offering, Including Existing Shares Shares Sold in Initial Public Offering, Including Existing Shares Shares Sold in Initial Public Offering, Including Existing Shares Shares sold in initial public offering, including existing shares, price per share Shares sold in initial public offering, including existing shares, price per share Shares sold in initial public offering, including existing shares, price per share Shares issued during period Stock Issued During Period, Shares, New Issues Shares Sold by Existing Stockholders During Initial Public Offering Shares Sold by Existing Stockholders During Initial Public Offering Shares Sold by Existing Stockholders During Initial Public Offering Proceeds from Issuance Initial Public Offering Proceeds from Issuance Initial Public Offering Payments of Stock Issuance Costs Sale of Stock, Expenses Incurred in Offering Sale of Stock, Expenses Incurred in Offering Conversion of stock, shares converted Conversion of Stock, Shares Converted Preferred Stock, Shares Authorized Foreign exchange gains (losses) Other income (expense) Other non operating income expense other Other non operating income expense other Otherincome (expense), net Restatement of previously issued financial statements Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance as of December 31, 2011 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Balance as of September 30, 2012 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Weighted average exercise price, balance as of December 31, 2011 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, canceled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted average exercise price, balance as of September 30, 2012 (in dollars per share) Weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Vested and Expected to vest - September 30, 2012 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Exercisable - September 30, 2012 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Vested and Expected to vest - September 30, 2012, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Exercisable - September 30, 2012, Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Vested and Expected to vest - September 30, 2012, weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Exercisable - September 30, 2012, weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical Area [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] United States UNITED STATES Other Segment, Geographical, Groups of Countries, Group One [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of operating segments Number of Operating Segments Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] 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, by Report Line [Axis] 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, Report Line [Domain] Cost of revenues (Member) Cost of Sales [Member] Research and development [Member] Research and Development Expense [Member] Selling and marketing [Member] Selling and Marketing Expense [Member] General and administrative [Member] General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Stock-based employee compensation Allocated Share-based Compensation Expense Unrecognized employee compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized employee compensation cost, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Non-employee share-based compensation expense Share-based Goods and Nonemployee Services Transaction, Expense Numerator [Abstract] Numerator [Abstract] Numerator [Abstract] Net income attributable to participating securities Participating Securities, Distributed and Undistributed Earnings Net income attributable to common stockholders - basic Undistributed earnings allocated to participating securities Undistributed Earnings Allocated to Participating Securities Net income available to common stockholders - diluted Net Income (Loss) Available to Common Stockholders, Diluted Denominator [Abstract] Denominator [Abstract] Denominator [Abstract] Weighted - average shares used in computing net income per share attributable to common stockholders - basic (in shares) Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Convertible Preferred Stock (in shares) Incremental Common Shares Attributable to Conversion of Preferred Stock Common Stock Options (in shares) Incremental Common Shares Attributable to Share-based Payment Arrangements Warrants (in shares) Incremental Common Shares Attributable to Call Options and Warrants Contingently Issuable Shares Related to an Acquisition (in shares) Incremental Common Shares Attributable to Contingently Issuable Shares Weighted - Average Shares Used in Computing Net Income Per Share Attributable to Common Stockholders - Diluted (in shares) Basic (usd per share) Diluted (usd per share) Common Stock Options (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Stockholders' Equity [Table] Stockholders Equity [Table] Stockholders Equity [Table] Pro forma shares issued Pro Forma [Member] Other equity compensation Other Equity Compensation [Member] Other Equity Compensation [Member] Stockholders Equity [Line Items] Stockholders Equity [Line Items] [Line Items] for Stockholders Equity [Table] Shares issued during period from share-based compensation Stock Issued During Period, Shares, Share-based Compensation, Gross Shares repurchase of unvested early-exercised stock options Options outstanding under the stock option plans Options available for future grants under the stock option plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Convertible preferred stock outstanding Total shares reserved for future issuance Common Stock, Capital Shares Reserved for Future Issuance Shares outstanding on fully diluted basis Common Stock, Shares, Outstanding, Fully Diluted Basis Common Stock, Shares, Outstanding, Fully Diluted Basis Preferred stock, par value per share (in dollars per share) Price per share of issued stock (in dollars per share) Stock Issued During Period, Value, New Issues, Price Per Share Stock Issued During Period, Value, New Issues, Price Per Share Shares of common stock issued upon conversion of preferred stock Convertible Preferred Stock, Shares Issued upon Conversion Minimum price per share in public offering to trigger preferred stock conversion (in dollars per share) Convertible Preferred Stock, Conversion Trigger, Minimum Price per Share in Public Offering Convertible Preferred Stock, Conversion Trigger, Minimum Price per Share in Public Offering Aggregate offering proceeds from public offering to trigger preferred stock conversion Convertible Preferred Stock, Conversion Trigger, Aggregate Public Offering Convertible Preferred Stock, Conversion Trigger, Aggregate Public Offering Subsequent Events Subsequent Events [Text Block] Schedule of Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Computer equipment Computer Equipment [Member] Computer software Software [Member] Furniture, fixtures and equipment Furniture and Fixtures [Member] Scanner applicances and other computer equipment subject to subscription Scanner applicances and other computer equipment subject to subscription [Member] Scanner applicances and other computer equipment subject to subscription [Member] Scanner appliances and other computer equipment not placed in service Scanner Appliances and Other Computer Equipment Not Placed in Service [Member] Scanner Appliances and Other Computer Equipment Not Placed in Service [Member] Leasehold improvements Leasehold Improvements [Member] Other fixed assets not placed in service Other Fixed Assets Not Placed in Service [Member] Other Fixed Assets Not Placed in Service [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment Property, Plant and Equipment, Gross Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Capital lease Capital Leased Assets, Gross Capital lease, accumulated depreciation Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Depreciation and amortization expense Depreciation and Amortization of Leased Asset Depreciation and Amortization of Leased Asset Property and equipment Property, Plant and Equipment [Table Text Block]