Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Sales Tax Accrual [Member] Sales Tax Accrual [Member] Sales Tax Accrual [Member] 401K Accrual [Member] 401K Accrual [Member] 401K Accrual [Member] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Loss Contingencies [Line Items] Operating Leased Assets [Line Items] Accrued contingency Loss Contingency, Accrual, Current Fair Value Disclosures [Abstract] Fair Value of Financial Assets and Liabilities Fair Value Disclosures [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Acquired Intangible Assets, Net Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Estimate of Future Amortization Expense for Definite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Net Income (Loss) Attributable to Parent Adjustments to reconcile net loss 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 Stock-based expense Share-based Compensation Bad debt expense (recovery) Provision for Doubtful Accounts Amortization of deferred financing costs Amortization of Debt Issuance Costs Loss on sublease Gain (Loss) on Contract Termination Other non-cash expense (benefit) Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other non-current assets Increase (Decrease) in Other Noncurrent Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Other liabilities, long-term Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sale of discontinued operations Proceeds from Divestiture of Businesses, Net of Cash Divested Purchases of property, equipment and capitalized internal-use software development costs Payments to Acquire Productive Assets Purchases of short-term investments Payments to Acquire Short-term Investments Proceeds from maturities of short-term investments Proceeds from Maturities, Prepayments and Calls of Short-term Investments Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from employee stock compensation plans Proceeds from Stock Options Exercised Payments on revolving line of credit Repayments of Lines of Credit Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate fluctuations on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Supplemental disclosure of other cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes, net of refunds Income Taxes Paid, Net Cash paid for interest Interest Paid Supplemental disclosure of non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Purchase of fixed assets recorded in accounts payable Capital Expenditures Incurred but Not yet Paid Capitalized stock-based compensation Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Statement of Financial Position [Abstract] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current 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 Treasury stock, shares Treasury Stock, Shares Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Certificates of deposit Certificates of Deposit [Member] Municipal debt securities Municipal Bonds [Member] Commercial paper Commercial Paper [Member] U.S. Treasury securities US Treasury Securities [Member] US government agencies debt securities US Government Agencies Debt Securities [Member] Corporate debt securities Corporate Debt Securities [Member] Schedule of Available-for-Sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Cost Available-for-sale Debt Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities Impairment Charges Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Short-term investments Short-term Investments Accounts receivable, net of allowance for doubtful accounts of $1,563 and $2,362 as of October 31, 2016 and April 30, 2016, respectively Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, equipment and capitalized internal-use software development costs, net Property, Plant and Equipment, Net Goodwill Goodwill Acquired intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other non-current assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders' equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses and other current liabilities Other Liabilities, Current Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Revolving line of credit Long-term Line of Credit, Noncurrent Deferred revenue less current portion Deferred Revenue, Noncurrent Other liabilities, long-term Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 9) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock – $0.0001 par value; 150,000,000 shares authorized, 83,663,249 shares issued and 83,463,249 shares outstanding as of October 31, 2016; 150,000,000 shares authorized, 82,269,748 shares issued and 82,069,748 shares outstanding at April 30, 2016 Common Stock, Value, Issued Treasury stock, at cost – 200,000 shares as of October 31, 2016 and April 30, 2016 Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Acquired Intangible Assets, net Intangible Assets Disclosure [Text Block] Earnings Per Share [Abstract] Computation Of Basic And Diluted Earnings Per Common Share [Table] Computation Of Basic And Diluted Earnings Per Common Share [Table] Computation Of Basic And Diluted Earnings Per Common Share [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Outstanding stock options Equity Option [Member] Restricted shares Restricted Stock [Member] Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items] Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items] Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items] Basic and diluted loss per share Earnings Per Share, Basic and Diluted Basic and diluted weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Basic and Diluted Potentially dilutive securities (1): Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Outstanding stock options Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Statement [Abstract] Revenue Revenue, Net Cost of revenue Cost of Goods and Services Sold 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 Restructuring charges Restructuring Charges Acquisition-related and other Business Combination, Acquisition Related Costs Amortization of acquired intangible assets Amortization of Intangible Assets Total operating expenses Operating Expenses Operating loss Operating Income (Loss) Other income (expense), net: Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense Interest Expense Other expense Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net loss Net loss per share: Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted weighted average number of shares outstanding Restructuring Charges [Abstract] Restructuring Charges Restructuring and Related Costs [Table Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive gain (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Unrealized gain (loss) on investments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive gain (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Restructuring Charges Restructuring and Related Activities Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Money market funds Money Market Funds [Member] Certificates of deposit Commercial paper U.S. Treasury securities Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair value, measurements, recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair value, inputs, level 1 Fair Value, Inputs, Level 1 [Member] Fair value, inputs, level 2 Fair Value, Inputs, Level 2 [Member] Fair value, inputs, level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash equivalents: Cash and Cash Equivalents, Fair Value Disclosure Short-term investments: Total assets Assets, Fair Value Disclosure Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Number of clients that accounted for more than 10% of account receivables Number of Customers With Greater Than Ten Percent Accounts Receivable Balance Number of Customers With Greater Than Ten Percent Accounts Receivable Balance Number of clients that accounted for more than 10% of revenue Number of Customers With Greater Than Ten Percent Revenue Number of Customers With Greater Than Ten Percent Revenue Revenue Recognition, Multiple-deliverable Arrangements [Table] Revenue Recognition, Multiple-deliverable Arrangements [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Software as a Service (“SaaS”) Software as Service (SaaS) [Member] Software as Service (SaaS) [Member] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Foreign Currency Transaction Gain (Loss), before Tax Foreign Currency Transaction Gain (Loss), before Tax Service agreement period Revenue Recognition, Service Agreement, Period Revenue Recognition, Service Agreement, Period Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Demand deposit accounts Demand Deposits [Member] Money market funds Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Total cash and cash equivalents Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common stock Common Stock [Member] Treasury stock Treasury Stock [Member] Additional paid-in capital Additional Paid-in Capital [Member] Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] Accumulated deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Beginning balance, Shares Shares, Outstanding Beginning balance Excess tax deficiency related to stock-based expense Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Stock-based expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Issuance of restricted stock awards Stock Issued During Period, Shares, Restricted Stock Award, Gross Exercise of stock options and vested restricted stock units, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options and vested restricted stock units Stock Issued During Period, Value, Stock Options Exercised Shares issued under employee stock plans, shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares issued under employee stock plans Stock Issued During Period, Value, Employee Stock Purchase Plan Change in foreign currency translation adjustment Change in unrealized gain on investments Net loss Ending balance, Shares Ending balance Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Severance [Member] Employee Severance [Member] Other Restructuring [Member] Other Restructuring [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Balance at April 30, 2016 Restructuring Reserve Utilization Restructuring Reserve Settled During Period Restructuring reserves settled during period including cash and non-cash transactions. Balance at October 31, 2016 Net Loss Per Share Applicable to Common Stockholders Earnings Per Share [Text Block] Summary of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Summary of Short-Term Investments Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Summary of Fair Value of Financial Assets and Liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving credit facility Revolving Credit Facility [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Swingline Loan Swing Line Loan [Member] Swing Line Loan [Member] Letter of Credit [Member] Letter of Credit [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Daily adjusting LIBOR rate London Interbank Offered Rate (LIBOR) [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Unused lines of credit Unused lines of Credit [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Revolving line of credit with a borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Revolving letter of credit with a borrowing capacity Letter Of Credit Maximum Borrowing Capacity Letter of credit maximum borrowing capacity. Interest above daily adjusting LIBOR rate Debt Instrument, Basis Spread on Variable Rate Credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Loan and security agreement, expiration date Line of Credit Facility, Expiration Date Letters of credit outstanding, Amount Letters of Credit Outstanding, Amount Fees capitalized related to the amended and restated credit facility Line of Credit Facility, Collateral Fees, Amount Amortization of deferred financing costs Repayments of Debt Repayments of Debt Long-term Line of Credit Long-term Line of Credit Document And Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fiscal Year Fiscal Period, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Unaudited Interim Financial Information Interim Financial Information Policy [Text Block] Interim Financial Information Policy. Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Concentrations of Credit Risk and Significant Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Deferred Revenue Revenue Recognition, Deferred Revenue [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Acquired Finite Lived and Indefinite Lived Intangible Assets [Table] Acquired Finite Lived and Indefinite Lived Intangible Assets [Table] Acquired Finite Lived and Indefinite Lived Intangible Assets [Table] 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] Customer relationships Customer Relationships [Member] Developed technology Developed Technology Rights [Member] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Acquired finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Gross Fair Value Intangible Assets, Gross (Excluding Goodwill) Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Acquired finite-lived intangible assets, net book value Finite-Lived Intangible Assets, Net Total Organization and Nature of Operations Nature of Operations [Text Block] Remaining six months of Fiscal year 2017 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Fiscal year 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two Fiscal year 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three Fiscal year 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four Fiscal year 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Computations of Loss per Share Applicable to Common Stockholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Company's effective tax rate Effective Income Tax Rate Reconciliation, Percent