Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Unaudited Consolidated Balance Sheets Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents-End of Period Cash and Cash Equivalents-Beginning of Period Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net Prepaid Expense and Other Assets, Current Prepaid expenses and other Deferred Tax Assets, Net, Current Deferred income tax assets, net Represents the sum of the carrying amounts as of the balance sheet date of all assets, before funds held for clients, that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets Current before Funds Held for Clients Total current assets before funds held for clients Funds Held for Clients Funds held for clients Assets, Current Total current assets Prepaid Expense, Noncurrent Long-term prepaid expenses Capitalized Computer Software, Net Capitalized internal-use software, net Capitalized internal-use software, net Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Finite-Lived Intangible Assets, Net Intangible assets, net Intangible assets, net Goodwill Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity (Deficit) Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Business Combination, Contingent Consideration, Liability Consideration related to acquisitions Accrued Liabilities, Current Accrued expenses Total accrued expenses Represents the amount of total current liabilities, before client fund obligations, incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Liabilities Current before Client Fund Obligations Total current liabilities before client fund obligations Represents the amount of obligations related to client funds that will be paid within the next twelve months or within one business cycle, if longer. Client Fund Obligations Current Client fund obligations Liabilities, Current Total current liabilities Deferred Rent Credit, Noncurrent Deferred rent Deferred Tax Liabilities, Net, Noncurrent Deferred income tax liabilities, net Liabilities Total liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity Preferred Stock, Value, Issued Preferred stock, $0.001 par value, 5,000 authorized, no shares issued and outstanding at June 30, 2015 and September 30, 2015 Common Stock, Value, Issued Common stock, $0.001 par value, 155,000 shares authorized at June 30, 2015 and September 30, 2015; 50,703 shares issued and outstanding at June 30, 2015 and 50,833 shares issued and outstanding at September 30, 2015 Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred Stock, par value (in dollars 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, Par or Stated Value Per Share Common Stock, par value (in dollars per share) Common Stock, Shares Authorized Common Stock, shares authorized Common Stock, Shares, Issued Common Stock, shares issued Common Stock, Shares, Outstanding Balance (in shares) Balance (in shares) Common Stock, shares outstanding Unaudited Consolidated Statements of Operations Revenues [Abstract] Revenues Represents the amount of fees earned during the period that is recurring in nature. Recurring Fees Recurring fees Represents the amount of interest income on funds held for clients during the period. Interest Income on Funds Held for Clients Interest income on funds held for clients Represents the aggregate amount of revenue recognized during period that is recurring in nature. Recurring Revenues Total recurring revenues Represents the amount of revenue earned from providing implementation services and other activities during the period. Implementation Services and Other Revenue Implementation services and other Revenues Total revenues Cost of Revenue [Abstract] Cost of revenues Represents the amount of expenses incurred during the period that are recurring in nature. Cost of Recurring Revenue Recurring revenues Represents the amount of expenses incurred during the period from providing implementation services and other activities during the period. Implementation Services and Other Cost of Revenue Implementation services and other Cost of Revenue Total cost of revenues Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses Selling and Marketing Expense Sales and marketing Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Operating loss Nonoperating Income (Expense) Other income Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Loss before income taxes Income Tax Expense (Benefit) Income tax expense Net Income (Loss) Attributable to Parent Net loss Net loss Net loss Net Income (Loss) Available to Common Stockholders, Basic Net loss attributable to common stockholders Earnings Per Share, Basic and Diluted [Abstract] Net loss per share: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Weighted-average shares used in computing net loss per share attributable to common stockholders: Weighted average share used in computing net loss per share: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Diluted (in shares) Unaudited Consolidated Statement of Changes in Stockholders' Equity (Deficit) Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Accumulated Deficit Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Stock Issued During Period, Value, Stock Options Exercised Stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options exercised (in shares) Stock options exercised (in shares) Represents the aggregate value of stock related to restricted stock units vested during the period. Adjustments to Additional Paid in Capital Restricted Stock Vesting Issuance of common stock upon vesting of restricted stock units Represents the aggregate shares of stock related to Restricted Stock units vested during the period. Stock Issued During Period Shares Restricted Stock Units Vesting Issuance of common stock upon vesting of restricted stock units (in shares) Represents the aggregate change in value due to net settlement of taxes and/or exercise price of options exercised and/or RSUs/RSAs vested during the period. Net settlement for taxes and/or exercise price related to equity awards Net settlement for taxes and/or exercise price related to equity awards Represents information pertaining to number of shares utilized in net settlement of taxes and/or exercise price of options exercised and/or RSUs/RSAs vested during the period. Net settlement for taxes and/or exercise price related to equity awards (in shares) Net settlement for taxes and/or exercise price related to equity awards (in shares) Shares withheld in settlement of taxes and exercise price (in shares) Unaudited Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Share-based Compensation Stock-based compensation Depreciation, Depletion and Amortization Depreciation and amortization Deferred Income Tax Expense (Benefit) Deferred income tax expense Provision for Doubtful Accounts Provision for doubtful accounts Charged to expense Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of equipment Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Prepaid Expense Prepaid expenses Increase (Decrease) in Accounts Payable, Trade Trade accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments to Develop Software Capitalized internal-use software costs Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Businesses, Gross Payments for acquisitions Increase (Decrease) in Client Funds Held Net change in funds held for clients Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Represents the amount of net increase (decrease) in client funds obligation during the period. Increase (Decrease) in Client Funds Obligation Net change in client funds obligation Payments of Stock Issuance Costs Payments on initial public offering costs Proceeds from Stock Options Exercised Proceeds from exercise of stock options Taxes paid related to net share settlement of equity awards Taxes paid related to net share settlement of equity awards Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Continuing Operations Net Change in Cash and Cash Equivalents Noncash Investing and Financing Items [Abstract] Supplemental Disclosure of Non-Cash Investing and Financing Activities Represents the amount of build-out allowance received from landlord. Build-out Allowance Received from Landlord Build-out allowance received from landlord Fair Value of Assets Acquired Purchases of property and equipment, accrued but not paid Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Income Taxes Paid Cash paid for income taxes Organization and Description of Business Business Description and Basis of Presentation [Text Block] Organization and Description of Business Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Balance Sheet Information Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Benefit Plans Compensation and Employee Benefit Plans [Text Block] Benefit Plans Loss Per Share Earnings Per Share [Text Block] Loss Per Share Income Taxes Income Tax Disclosure [Text Block] Income Taxes Disclosure of accounting policy for consolidation and use of estimates. Consolidation and Use of Estimates Disclosure of accounting policy for interim unaudited consolidated financial information of the entity. Interim Unaudited Consolidated Financial Information [Policy Text Block] Interim Unaudited Consolidated Financial Information Income Tax, Policy [Policy Text Block] Income Taxes Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Tabular disclosure of activity in allowance for doubtful accounts. Schedule of Activity of Allowance for Doubtful Accounts [Table Text Block] Schedule of activity in allowance for doubtful accounts Tabular disclosure of information pertaining to capitalized software and accumulated amortization. Schedule of Capitalized Software and Accumulated Amortization [Table Text Block] Schedule of capitalized internal-use software and accumulated amortization Property, Plant and Equipment [Table Text Block] Schedule of property and equipment Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of intangible assets Schedule of Accrued Liabilities [Table Text Block] Schedule of components of accrued expenses Schedule of Share-based Compensation, Activity [Table Text Block] Summary of shares available for grant under our equity incentive plans Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense related to stock options, Restricted Stock Units and the Employee Stock Purchase Plan Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of the assumptions used for estimating the fair value of stock options granted Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Restricted stock unit activity Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of estimated grant date fair value of ESPP offering period using weighted average assumptions Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of calculation of basic and diluted net loss per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of outstanding employee stock options, restricted stock units and employee stock purchase plan shares excluded from the diluted per share calculation because to include them would have been anti-dilutive Tabular presentation of the organization and description of business. Organization and Description of Business [Table] Subsidiary, Sale of Stock [Axis] Sale Of Stock Name Of Transaction [Domain] Sale of Stock, Name of Transaction [Domain] Secondary offering of shares to public. Secondary Offering [Member] Secondary Offering Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Organization and Description of Business [Line Items] Secondary offering Number of shares of stock sold during the period. Stock Issued During Period Shares Public Offering Number of shares of common stock sold Share Price Public offering price (in dollar per share) The number of additional shares sold to underwriters pursuant to over-allotment options in a public offering. Stock Issued During Period Shares Over Allotment Options Exercised Secondary offering exercised by underwriters (in shares) Represents the cash value received for stock issued during a public offering subsequent to the initial public offering. Proceeds From issuance Public Offering Proceeds received from public offering Allowance for Doubtful Accounts Receivable [Roll Forward] Activity in allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Balance at end of period Balance at beginning of period Allowance for Doubtful Accounts Receivable, Write-offs Write-offs Capitalized Computer Software, Net [Abstract] Capitalized internal-use software and accumulated amortization Capitalized Computer Software, Gross Capitalized internal-use software Capitalized Computer Software, Accumulated Amortization Accumulated amortization Capitalized Computer Software, Amortization Amortization of capitalized internal-use software costs Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Office Equipment [Member] Office equipment Computer Equipment [Member] Computer equipment Furniture And Fixtures [Member] Furniture and fixtures Computer Software Intangible Asset [Member] Software Leasehold Improvements [Member] Leasehold improvements Represents information pertaining to time clocks rented by clients. Time Clocks Rented By Clients [Member] Time clocks rented by clients Property, Plant and Equipment [Line Items] Property and equipment Property, Plant and Equipment, Gross Property and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Depreciation Depreciation expense Accrued Liabilities, Current [Abstract] Components of accrued expenses Employee-related Liabilities, Current Accrued payroll and personnel costs Deferred Rent Credit, Current Current portion of deferred rent Other Accrued Liabilities, Current Other Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis]