Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-09 [Member] Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued expenses Accounts Receivable, Net, Current Accounts receivable, net of allowance for doubtful accounts of $2,281 and $1,979 at March 31, 2018 and December 31, 2017, respectively Accrued Royalties, Current Accrued royalties Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation on property and equipment Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock based compensation Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments: Allocated Share-based Compensation Expense Total stock based compensation expense Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts, net Amendment Flag Amendment Flag Amortization of Deferred Sales Commissions Amortization of deferred commissions Amortized Cost and Fair Value Debt Securities [Abstract] Amortized Cost and Fair Value Debt Securities [Abstract] Amortized Cost and Fair Value Debt Securities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Total number of common equivalent shares excluded from the calculations of diluted earnings per share Asset Impairment Charges Impairment losses on receivables and contract asset Assets Total assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets, Noncurrent [Abstract] Non-current assets: Disposal Group, Including Discontinued Operation, Assets Total assets of discontinued operations in the condensed consolidated balance sheet Disposal Group, Including Discontinued Operation, Assets [Abstract] Carrying amounts of assets included as part of discontinued operations: Disposal Group, Including Discontinued Operation, Assets, Current Current assets of discontinued operations Current assets of discontinued operations Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Available for sale securities, Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Available for sale securities, Unrealized Losses Available-for-sale Securities, Amortized Cost Basis Available for sale securities, Adjusted Cost Available-for-sale Securities, Current Available for sale securities, Fair Value Marketable securities Award Type [Axis] Award Type [Axis] Base Rate [Member] Base Rate [Member] Business Description and Basis of Presentation [Text Block] Basis of Presentation Calculated under Revenue Guidance in Effect before Topic 606 [Member] Balances without Adoption of ASC 606 [Member] Capitalized Computer Software, Accumulated Amortization Accumulated amortization on capitalized software development Capitalized Computer Software, Net Capitalized software development, net of accumulated amortization of $39,533 and $37,174 at March 31, 2018 and December 31, 2017, respectively Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Cash Provided by (Used in) Financing Activities, Discontinued Operations Net cash provided by (used in) discontinued financing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash used in discontinued investing activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash (used in) provided by discontinued operating activities Commitments and Contingencies Commitments and contingencies Common Stock, Dividends, Per Share, Cash Paid Special cash dividend Common Stock, Dividends, Per Share, Declared Dividends declared per share Dividends per share common stock Common Stock Including Additional Paid in Capital [Member] Common Stock [Member] Common Stock, No Par Value Common stock, no par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Ending balance, shares Beginning balance, shares Common stock, shares outstanding Common Stocks, Including Additional Paid in Capital Common stock, no par value, 75,000 shares authorized; 32,302 and 31,908 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Contract with Customer, Liability, Revenue Recognized Revenue recognized in period, included in deferred revenue at beginning of the period Corporate Debt Securities [Member] Corporate Debt Securities [Member] Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization Cost of revenues (excluding depreciation and amortization) Cost of Sales [Member] Cost of Revenues (Excluding Depreciation and Amortization) [Member] Costs and Expenses Total operating costs and expenses Costs and Expenses [Abstract] Costs and expenses Operating costs and expenses: Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Cumulative Effect on Retained Earnings, Net of Tax Cumulative effect of accounting change Current Fiscal Year End Date Current Fiscal Year End Date Customer Contracts [Member] Customer Contracts [Member] Customer-Related Intangible Assets [Member] Customer-Related Intangible Assets [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Debt Instrument, Periodic Payment, Principal Principal payments prior to maturity Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Revenue, Current Deferred revenue Deferred revenue, current Deferred Revenue, Noncurrent Deferred revenue, noncurrent Deferred Sales Commission Deferred commissions Deferred Tax Assets, Net, Noncurrent Deferred tax assets Deferred Tax Liabilities, Net, Noncurrent Deferred tax liabilities Denominator. Denominator [Abstract] Denominator: Depreciation, Depletion and Amortization Depreciation and amortization Description of contracts with customer. Description of Contracts with Customer Description of contracts with customer Description of sales commission plan. Description of Sales Commission Plan Description of sales commission plan Difference between Revenue Guidance in Effect before and after Topic 606 [Member] ASC 606 Adjustments [Member] Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table Text Block] Schedule of Revenues Included in Continuing Operations from Contracts with Customers Disaggregated by Revenue Source Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Gain on sale of discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Loss from discontinued operations before income tax provision Loss from discontinued operations before income tax provision Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operation, Tax Effect of Discontinued Operation Income tax provision Income tax provision (benefit) Disposal Date Date of business segment sold Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Disposal group including discontinued operation accounts receivable unbilled. Disposal Group Including Discontinued Operation Accounts Receivable Unbilled Accounts receivable - unbilled Disposal group including discontinued operation accrued royalties payable. Disposal Group Including Discontinued Operation Accrued Royalties Payable Accrued royalties Disposal Group, Including Discontinued Operation, Assets, Noncurrent Long-term assets of discontinued operations Long-term assets of discontinued operations Non-current assets of discontinued operations Disposal group, including discontinued operation, capitalized software development, net. Disposal Group, Including Discontinued Operation, Capitalized Software Development, Net Capitalized software development, net Disposal group, including discontinued operation, cost of revenues excluding depreciation and amortization. Disposal Group, Including Discontinued Operation, Cost of Revenues Excluding Depreciation and Amortization Cost of revenues (excluding depreciation and amortization) Disposal Group, Including Discontinued Operation, Deferred Revenue Deferred revenue Disposal Group, Including Discontinued Operation, Deferred Revenue, Noncurrent Deferred revenue, noncurrent Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Deferred tax liabilities Disposal Group, Including Discontinued Operation, Depreciation and Amortization Depreciation and amortization Disposal Group, Including Discontinued Operation, General and Administrative Expense Other general and administrative expenses Disposal Group, Including Discontinued Operation, Goodwill Goodwill Disposal Group, Including Discontinued Operation, Intangible Assets Customer-related intangibles, net Disposal Group, Including Discontinued Operation, Operating Expense Total operating costs and expenses Disposal group including discontinued operation operating expense. Disposal Group Including Discontinued Operation Operating Expense [Abstract] Operating costs and expenses: Disposal Group, Including Discontinued Operation, Operating Income (Loss) Loss from operations of discontinued operations Disposal Group, Including Discontinued Operation, Other Assets Other assets Disposal Group, Including Discontinued Operation, Other Income Other income, net Disposal group including discontinued operation other intangible assets net. Disposal Group Including Discontinued Operation Other Intangible Assets Net Other intangible assets, net Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Other long term liabilities Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Other prepaid expenses and other current assets Disposal group, including discontinued operation, prepaid royalties, net of amortization. Disposal Group, Including Discontinued Operation, Prepaid Royalties, Net of Amortization Prepaid royalties, net of amortization Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Property and equipment, net Disposal group including discontinued operation research and development expense. Disposal Group Including Discontinued Operation Research and Development Expense Product development Disposal Group, Including Discontinued Operation, Revenue Revenues, net Disposal group including discontinued operation selling and marketing expense. Disposal Group Including Discontinued Operation Selling and Marketing Expense Sales and marketing Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Dividends Payable, Date to be Paid Dividend payable date Dividends, Common Stock, Stock Dividends declared on common stock ($1.00 per share) Dividends Payable, Current Accrued dividends Dividends Payable, Date Declared Dividend declared date Dividends Payable, Date of Record Dividend record date Document and entity information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic Earnings per share - basic Earnings per share - basic Earnings Per Share, Basic [Abstract] Earnings (loss) per share - basic: Earnings Per Share, Diluted Earnings per share - diluted Earnings per share - diluted Earnings Per Share, Diluted [Abstract] Earnings (loss) per share - diluted: Earnings Per Share [Text Block] Earnings Per Share Effective Income Tax Rate Reconciliation, Percent Effective tax rate 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] Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options Excess tax benefits primarily from stock option exercises Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Escrow Deposit Escrow deposit Eurodollar [Member] Eurodollar [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Federal Funds Effective Swap Rate [Member] Federal Funds Effective Swap Rate [Member] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization on intangible assets 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] Finite-Lived Intangible Assets, Net Intangible assets, net General and Administrative Expense [Member] Other General and Administrative [Member] Goodwill Goodwill HealthStream Provider Solutions. HealthStream Provider Solutions [Member] Provider Solutions [Member] HealthStream Workforce Solutions. HealthStream Workforce Solutions [Member] Workforce Solutions [Member] Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income from continuing operations Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income from continuing operations before income tax provision Income from continuing operations before income tax provision Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income from continuing operations Income from continuing operations Income (Loss) from Continuing Operations, Per Basic Share Continuing operations Income (Loss) from Continuing Operations, Per Diluted Share Continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income (loss) from discontinued operations, net of income taxes Income (loss) from discontinued operations Loss from discontinued operations, net of income taxes (Income) loss from discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Discontinued operations Income (Loss) from Equity Method Investments (Gain) loss on non-marketable equity investments Income Statement [Abstract] Income Statement [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income taxes disclosure. Income Taxes Disclosure [Line Items] Income Taxes Disclosure [Line Items] Income Taxes Disclosure [Table] Income Taxes Disclosure [Table] Income Taxes Disclosure [Table] Income Tax Expense (Benefit) Income tax provision Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Prepaid Expense and Other Assets Other prepaid expenses and other current assets Increase (Decrease) in Prepaid Royalties Prepaid royalties Increase (Decrease) in Receivables Accounts and unbilled receivables Increase (Decrease) in Royalties Payable Accrued royalties Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Effect of dilutive shares Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Interest Coverage Ratio One Interest Coverage Ratio One Interest coverage ratio Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Non-marketable equity investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Marketable Securities Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Letter Of Credit Subfacility [Member] Letter Of Credit Subfacility [Member] Letter of Credit Subfacility [Member] Leverage Ratio One Leverage Ratio One Maximum total leverage ratio Liabilities [Abstract] Liabilities Liabilities and Equity Total liabilities and shareholders' equity Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Disposal Group, Including Discontinued Operation, Liabilities Total liabilities of discontinued operations in the condensed consolidated balance sheet Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Carrying amounts of liabilities included as part of discontinued operations: Disposal Group, Including Discontinued Operation, Liabilities, Current Current liabilities of discontinued operations Current liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Long-term liabilities of discontinued operations Long-term liabilities of discontinued operations Long-term Line of Credit Outstanding and borrowing balance on the revolving credit facility Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Covenant Terms Description of Line of credit facility Covenant Line of Credit Facility, Expiration Date Maturity date of Loan agreement Line Of Credit Facility Increased Facility Size Due To Accordion Feature Line Of Credit Facility Increased Facility Size Due To Accordion Feature Increase in revolving credit facility Line of Credit Facility, Interest Rate Description Interest rate under credit facility Line of Credit Facility, Interest Rate During Period Line of Credit Facility, Interest Rate During Period Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity under credit facility Line Of Credit Facility Percentage Of Applicable Margin For Borrowings Line Of Credit Facility Percentage Of Applicable Margin For Borrowings Applicable margin for loans Line of Credit Facility [Table] Line of Credit Facility [Table] Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee paid per annum Segment Reconciling Items [Member] Unallocated [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) continuing financing activities Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by (used in) continuing investing activities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by continuing operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] OPERATING ACTIVITIES: Net Income (Loss) Attributable to Parent Net income Net income New Accounting Pronouncement, Early Adoption [Line Items] New Accounting Pronouncement, Early Adoption [Line Items] New Accounting Pronouncement, Early Adoption [Table] New Accounting Pronouncement, Early Adoption [Table] New Accounting Pronouncement, Early Adoption [Table Text Block] Schedule of Impact of Adoption of Topic 606 on Condensed Consolidated Balance Sheet and Statement of Income New Accounting Pronouncements and Changes in Accounting Principles [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements New accounting standards not yet adopted policy. New Accounting Standards Not Yet Adopted [Policy Text Block] Accounting Standards Not Yet Adopted Number of stock incentive plans. Number Of Stock Incentive Plans Number of incentive plans Numerator. Numerator [Abstract] Numerator: Operating Income (Loss) Income from operations Operating income Operating income Operating Income (Loss) [Abstract] Operating income from continuing operations: Operating Segments [Member] Operating Segments [Member] Other Assets, Current Other prepaid expenses and other current assets Other Assets, Noncurrent Other assets Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Unrealized gain on marketable securities Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Total other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income, net of taxes: Other General and Administrative Expense Other general and administrative expenses Other Intangible Assets [Member] Other Intangible Assets [Member] Other Liabilities, Noncurrent Other long term liabilities Other Noncash Expense Other Other Nonoperating Income (Expense) Other income, net Patient Experience Solutions [Member] Patient Experience Solutions [Member] Patient Experience Solutions [Member] Payments for Software Payments associated with capitalized software development Payments of Merger Related Costs, Financing Activities Payment of earn-outs related to acquisitions Payments Related to Tax Withholding for Share-based Compensation Taxes paid related to net settlement of equity awards Payments to Acquire Marketable Securities Purchases of marketable securities Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Prepaid Royalties Prepaid royalties, net Prepaid royalties, net of amortization Proceeds from Divestiture of Businesses Consideration received Proceeds from Divestiture of Businesses and Interests in Affiliates Proceeds from sale of discontinued operations Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from maturities of marketable securities Proceeds from Stock Options Exercised Proceeds from exercise of stock options Product development. Product Development [Member] Product Development [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Professional services. Professional Services [Member] Professional Services [Member] Property, Plant and Equipment, Net Property and equipment, net of accumulated depreciation of $25,816 and $24,392 at March 31, 2018 and December 31, 2017, respectively Provision for Doubtful Accounts Provision for doubtful accounts Range [Axis] Range [Axis] Range [Domain] Range [Domain] Recently adopted accounting standards policy. Recently Adopted Accounting Standards Policy Policy [Text Block] Accounting Standards Recently Adopted Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Business Segment Information Based on Operating Income Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Business Segment Information Based on Net Revenues Research and Development Expense Product development Restricted Stock Units (RSUs) [Member] RSUs [Member] Retained Earnings (Accumulated Deficit) Retained earnings Retained Earnings [Member] Retained Earnings (Accumulated Deficit) [Member] Revenue from Contract with Customer, Excluding Assessed Tax Professional services Revenue, Initial Application Period Cumulative Effect Transition [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue recognition and sales commissions. Revenue Recognition and Sales Commissions [Abstract] Revenue Recognition and Sales Commissions [Abstract] Line items for revenue recognition and sales commissions. Revenue Recognition and Sales Commissions [Line Items] Revenue Recognition and Sales Commissions [Line Items] Table for revenue recognition and sales commissions. Revenue Recognition and Sales Commissions [Table] Revenue Recognition and Sales Commissions [Table] Disclosure of revenue recognition and sales commissions. Revenue Recognition and Sales Commissions [Text Block] Revenue Recognition And Sales Commissions Revenue, Remaining Performance Obligation Estimated revenue expected to be recognized in future under contract with customers Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Estimated revenue, expected recognition period Revenue remaining performance obligation percentage. Revenue Remaining Performance Obligation Percentage Percentage of remaining performance obligations expects revenue Revolving Credit Facility [Member] Revolving Credit Facility [Member] Sales commissions, amortization period. Sales Commissions, Amortization Period Sales Commissions, amortization period Sales commissions, amortization term description. Sales Commissions, Amortization Term Description Sales Commissions, amortization term description Revenue, Net Total revenues Revenue, net Revenues, net Revenue, Net [Abstract] Revenues, net: Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Fair Value of Available for Sale Marketable Securities Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Discontinued Operations, Income Statement, Balance Sheet and Cash Flow Statements Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of Basic and Diluted Earnings Per Share 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 [Table Text Block] Stock Based Compensation Expense Recorded Within Continuing Operations in Condensed Consolidated Statements of Income Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of Cumulative Effect for the Adoption of Topic 606 Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Business Segment Information Based on Assets Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Discontinued Operations [Member] Discontinued Operations [Member] Segments [Domain] Segments [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Business Segments Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Selling and Marketing Expense Sales and marketing Selling and Marketing Expense [Member] Sales and Marketing [Member] Share-based Compensation Stock based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted share units issued Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, restricted share unit Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity Award [Domain] Equity Award [Domain] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Segments [Axis] Segments [Axis] Equity Components [Axis] Equity Components [Axis] Statement [Line Items] Statement [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total shareholders' equity Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity Shareholders' equity: Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Common stock issued under stock plans, net of shares withheld for employee taxes, shares Stock Issued During Period, Shares, Share-based Compensation, Gross Stock based compensation , shares Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Common stock issued under stock plans, net of shares withheld for employee taxes Subscription/SaaS services. Subscription SaaS Services [Member] Subscription SaaS Services [Member] Sun Trust Bank [Member] Sun Trust Bank [Member] SunTrust Bank [Member] Swing Line Sub Facility [Member] Swing Line Subfacility [Member] Swing Line Sub Facility [Member] Term of contracts with customer. Term of Contracts with Customer Period of contract with customer Text Block [Abstract] Text Block [Abstract] Trading Symbol Trading Symbol Type of Adoption [Domain] Type of Adoption [Domain] Unbilled Receivables, Current Accounts receivable-unbilled Unbilled receivables US Government-sponsored Enterprises Debt Securities [Member] Government-Sponsored Enterprises Debt Securities [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted-average diluted shares Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average shares of common stock outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Weighted-average shares outstanding