Goodwill and Intangible Assets Disclosure [Abstract] Capitalized software amortization expense Capitalized Computer Software, Amortization Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent Adjustments to reconcile net income (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 Depreciation, Depletion and Amortization Amortization of debt issuance costs Amortization of Debt Issuance Costs Share-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Taxes and Tax Credits Bad debt expense Provision for Doubtful Accounts Accrued interest income Gain (Loss) on Investments, Excluding Other than Temporary Impairments Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense Prepaid income taxes Increase (Decrease) in Prepaid Taxes Deferred costs Increase (Decrease) in Deferred Charges Deferred revenue Increase (Decrease) in Deferred Revenue Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Other Operating Liabilities Accrued payroll and related expenses Increase (Decrease) in Employee Related Liabilities Share-based compensation liability payments Increase (Decrease) In Deferred Compensation Share-based Arrangements, Liability Increase (Decrease) In Deferred Compensation Share-based Arrangements, Liability Parent receivables and payables, net Increase (Decrease) in Due from Related Parties, Current 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 Payments to Acquire Property, Plant, and Equipment Additions to capitalized software Payments for Software 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] Repayments on credit agreement Repayments of Lines of Credit Cash received from exercise of stock options Proceeds from Stock Options Exercised Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Currency effect on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Supplemental disclosure of non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Contractual obligations for acquisition of fixed assets Capital Expenditures Incurred but Not yet Paid Income Tax Disclosure [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent U.S. Federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Summary of Revenue by Type Schedule of Segment Reporting Information, by Segment [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Awards Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Debt Disclosure [Abstract] 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] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit Agreement, June 2016 Credit Agreement, June 2016 [Member] Credit Agreement, June 2016 [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Base Rate Base Rate [Member] Eurodollar Eurodollar [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Borrowings outstanding Long-term Line of Credit Letters of credit outstanding Letters of Credit Outstanding, Amount Available borrowings under facility Line of Credit Facility, Remaining Borrowing Capacity Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Commitment fee percentage on unused portion Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 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] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based compensation Allocated Share-based Compensation Expense Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Subsidiary of common parent Subsidiary of Common Parent [Member] Parent Majority Shareholder [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] QVC QVC, Inc. [Member] QVC, Inc. [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Total revenue Sales Revenue, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer concentration risk Customer Concentration Risk [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Liberty Liberty [Member] Liberty [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Concentration risk, percentage Concentration Risk, Percentage Accounts receivable, net of allowances Accounts Receivable, Net, Current Loans receivable, basis spread on variable rate Loans Receivable, Basis Spread on Variable Rate Earned interest on promissory note Interest Income, Related Party Collection of note receivable - Parent Repayment of Notes Receivable from Related Parties Interest paid Repayment of Notes Receivable from Related Parties, Interest Portion Repayment of Notes Receivable from Related Parties, Interest Portion Commitments and Contingencies Disclosure [Abstract] Deferred rent Deferred Rent Credit, Current Remainder of 2017 Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Future minimum payments due under operating leases Operating Leases, Future Minimum Payments Due 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 Common Class A [Member] Series B Common Class B [Member] Series C Common Class C [Member] Statement [Line Items] Statement [Line Items] Allowance for accounts receivable Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $546 and $200, respectively Prepaid income taxes Prepaid Taxes Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Capitalized software, net Capitalized Computer Software, Net Deferred services costs Deferred Costs, Noncurrent Property and equipment, net Property, Plant And Equipment, Excluding Capitalized Computer Software, Net Property, Plant And Equipment, Excluding Capitalized Computer Software, Net Goodwill Goodwill Deferred income taxes Deferred Tax Assets, Net, Noncurrent Other long-term assets Other Assets, Noncurrent Total assets Assets Liabilities and Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued expenses Accounts Payable and Other Accrued Liabilities, Current Accrued payroll and related expenses Employee-related Liabilities, Current Income taxes payable Taxes Payable, Current Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Deferred revenue, long-term Deferred Revenue, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Long-term debt Long-term Debt, Excluding Current Maturities Total liabilities Liabilities Equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value. Authorized shares of 50,000,000; 0 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Total equity Stockholders' Equity Attributable to Parent Total liabilities and equity Liabilities and Equity Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 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 Entity [Abstract] Entity [Abstract] Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] 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 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 Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Omnibus Plan 2016 Omnibus Incentive Plan [Member] 2016 Omnibus Incentive Plan [Member] Legacy Plans Legacy Stock Option Plan [Member] Legacy Stock Option Plan [Member] Transitional Plan Transitional Stock Adjustment Plan [Member] Transitional Stock Adjustment Plan [Member] Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Grants (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 Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Outstanding, ending balance (in shares) Outstanding, Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding, Weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding, Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable, Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable, Weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable, Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Schedule of future minimum payments under operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Related Party Transactions Related Party Transactions Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Revenue (Note 7) Revenues Cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses: 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 (loss) from operations Operating Income (Loss) Other (expense) income: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income Investment Income, Interest Total other (expense) income Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income Tax Expense (Benefit) Net income (loss) Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings (loss) per share: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Shares used in computing earnings (loss) per share: 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 Earnings Per Share [Abstract] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Common stock issuable to pre-Spin-Off minority shareholders of CTI Equity Unit Purchase Agreements [Member] Stock options Employee Stock Option [Member] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Shares excluded from the earnings (loss) per share calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Basic - weighted average shares outstanding (in shares) Weighted average effect of dilutive potential securities (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted - weighted average shares outstanding (in shares) Anti-dilutive securities (in shares) Earnings (Loss) Per Share Earnings Per Share [Text Block] Usage revenue License and Services Revenue Subscription revenue Contracts Revenue Set-up and professional services Technology Services Revenue Total revenue Schedule of Product Information [Table] Schedule of Product Information [Table] Geographic Concentration Risk Geographic Concentration Risk [Member] Product Information [Line Items] Product Information [Line Items] Income Taxes Income Tax Disclosure [Text Block] Description of Business Business Description and Basis of Presentation [Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Accounting Policies [Abstract] Significant Accounting Policies Significant Accounting Policies [Text Block] Basis of Presentation Basis of Accounting [Text Block] Long-Term Debt Debt Disclosure [Text Block] Research and Development [Abstract] Schedule of capitalized software costs Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of future amortization expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Capitalized software costs Capitalized Computer Software, Gross Less accumulated amortization Capitalized Computer Software, Accumulated Amortization Capitalized software costs, net Accounting Changes and Error Corrections [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Omnibus Plan and Legacy Plan 2016 Omnibus Incentive Plan And Legacy Stock Option Plan [Member] 2016 Omnibus Incentive Plan And Legacy Stock Option Plan [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] RSUs Restricted Stock Units (RSUs) [Member] RSUs and RSAs Restricted Stock Units And Restricted Stock Awards [Member] Restricted Stock Units And Restricted Stock Awards [Member] Options and RSAs Options And Restricted Stock Awards [Member] Options And Restricted Stock Awards [Member] Common Series A and C Common Class A And Common Class C [Member] Common Class A And Common Class C [Member] Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Increase in shares available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Percentage increase in available shares for issuance Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Additional Shares Authorized, Percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Additional Shares Authorized, Percentage Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Weighted average grant date value of options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Compensation not yet recognized, options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Compensation cost not yet recognized, weighted average remaining vesting period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Compensation not yet recognized, non-options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Number of awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding, ending balance (in shares) Weighted average grant-date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding, ending balance (in dollars per share) Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Capitalized software Software Development [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Remainder of 2017 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four Capitalized Software Costs Intangible Assets Disclosure [Text Block] Risks and Uncertainties [Abstract] Concentrations of Significant Customers and Credit Risk Concentration Risk Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Share-based Compensation Allocation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of ESPP Weighted-average Assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of Stock Option Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of RSU Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]