Lease Arrangements [Axis] Lease Arrangements [Axis] Lease Arrangements [Axis] SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Common stock, acceleration (in shares) Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Acceleration Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Acceleration Customer [Domain] Customer [Domain] Unrealized Gain (Loss) on Investments, net of tax AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Letter of Credit Letter of Credit [Member] State Current State and Local Tax Expense (Benefit) Vested and released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Leasehold improvements Leasehold Improvements [Member] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Professional Service (investment banking advisory, legal and other professional services) Business Combination, Acquisition Related Costs Other intangible assets Other Intangible Assets [Member] Security Exchange Name Security Exchange Name Canceled (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Increase in provision for expected credit losses Accounts Receivable, Credit Loss Expense (Reversal), Gross Accounts Receivable, Credit Loss Expense (Reversal), Gross Other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Remaining lease term Operating Lease, Weighted Average Remaining Lease Term Foreign Currency Transactions and Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Gross Nth Party Nth Party, Ltd. [Member] Nth Party, Ltd. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Investment, Name [Axis] Investment, Name [Axis] Proceeds from issuance of debt, net of debt discount Proceeds from Issuance of Other Long-term Debt Number of shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Shares issuable assuming conversion (in shares) Debt Instrument, Convertible, Number of Equity Instruments 2023 Long-Term Debt, Maturity, Year Two Intrinsic values of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Amortization expense of intangible assets Amortization of Intangible Assets Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Estimated useful life Estimated Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Increases related to prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Loan Agreement Loan Agreement [Member] Loan Agreement Deferred Tax Assets, Net Net deferred tax assets (liability) Deferred Tax Assets, Net Discount rate Operating Lease, Weighted Average Discount Rate, Percent Total shares excluded from net income (loss) per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Technology and development Research and Development Expense [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Business Combination and Asset Acquisition [Abstract] Cash, Cash Equivalents, and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Award Type [Domain] Award Type [Domain] Local Phone Number Local Phone Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Long-term debt, term Long-term Debt, Term Lease liabilities - non-current portion Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Lease, Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Lease, Noncurrent Liabilities Preferred stock, $0.00001 par value, 10,000 shares authorized at December 31, 2021 and December 31, 2020; 0 shares issued and outstanding at December 31, 2021 and December 31, 2020 Preferred Stock, Value, Issued Finite-lived intangible assets acquired Finite-lived Intangible Assets Acquired Threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Accumulated Deficit Retained Earnings [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Leverage ratio maximum Line of Credit Facility, Covenant Compliance, Leverage Ratio Maximum Line of Credit Facility, Covenant Compliance, Leverage Ratio Maximum Accounts receivable Increase (Decrease) in Accounts Receivable Capitalized assets financed by accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Other liabilities, non-current Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Shares withheld related to net share settlement (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Supplier [Axis] Supplier [Axis] Repayment of financing lease Finance Lease, Principal Payments Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Basic (in USD per share) Basic net income (loss) per share (in USD per share) Earnings Per Share, Basic Operating lease expense Operating Lease, Expense Revenues Revenue from Contract with Customer [Text Block] Sublease income Sublease Income Restricted stock units outstanding and unvested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 2022 Long-Term Debt, Maturity, Year One Contractual interest expense Interest Expense, Debt 2023 Amortization Of Debt Discount (Premium), Year Two Amortization Of Debt Discount (Premium), Year Two Percent of company owned by holders of acquired company Percent Of Company Owned By Holders Of Acquired Company Percent Of Company Owned By Holders Of Acquired Company Diluted Income (Loss) Per Share: Earnings Per Share, Diluted [Abstract] Office Lease Office Lease [Member] Office Lease [Member] Debt Instrument Conversion Term [Axis] Debt Instrument Conversion Term [Axis] Debt Instrument Conversion Term Deferred Tax Liabilities, Net Net deferred tax assets (liability) Deferred Tax Liabilities, Net Fixed assets Deferred Tax Liabilities, Property, Plant and Equipment Entity Voluntary Filers Entity Voluntary Filers Senior Secured Revolving Credit Facility Senior Secured Revolving Credit Facility [Member] Senior Secured Revolving Credit Facility Fair value of options vested in period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Plan Name [Axis] Plan Name [Axis] Net Long-term Debt Debt Discount Amortization Of Debt Discounts [Abstract] Amortization Of Debt Discounts Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Concentration of Basis of Revenue Recognition Concentration of Basis of Revenue Recognition [Member] Concentration of Basis of Revenue Recognition Entity Small Business Entity Small Business Fiscal Year Lessee, Operating Lease, Liability, Payment, Due [Abstract] Increases related to current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Payment for capped call options Payments For Capped Call Options Payments For Capped Call Options Non-compete agreements Noncompete Agreements [Member] Additional paid-in capital Additional Paid in Capital LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Restricted stock units exchanged post-acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Restricted Stock Units Exchanged Post-Acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Restricted Stock Units Exchanged Post-Acquisition Accounts payable and accrued expenses Total Accounts Payable and Accrued Liabilities, Current Entity Interactive Data Current Entity Interactive Data Current Thereafter Long-Term Debt, Maturity, after Year Five Non-cash stock-based compensation (double-trigger acceleration and severance) Non-cash stock-based compensation Restructuring Reserve And Merger Related Costs, Settled Without Cash Restructuring Reserve And Merger Related Costs, Settled Without Cash Aggregate annual payments of principle balance (percent) Debt Instrument, Annual Principal Payment, Percentage Debt Instrument, Annual Principal Payment, Percentage 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Exercise of common stock options Stock Issued During Period, Value, Stock Options Exercised Restricted cash Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Restricted Cash Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Restricted Cash Balance Sheet Location [Domain] Balance Sheet Location [Domain] Conversion ratio Debt Instrument, Convertible, Conversion Ratio Meals and entertainment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent Beginning balance Ending balance Unrecognized Tax Benefits Total deferred tax assets Deferred Tax Assets, Gross Income Tax Authority [Domain] Income Tax Authority [Domain] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Address, State or Province Entity Address, State or Province SpotX and SpringServe SpotX, Inc. And ServeMotion, Inc. [Member] SpotX, Inc. And ServeMotion, Inc. Current liabilities: Liabilities, Current [Abstract] Capped calls, transaction costs Debt Instruments, Capped Calls, Transaction Costs Debt Instruments, Capped Calls, Transaction Costs General and administrative General and Administrative Expense Exercisable (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Accounting Policies [Abstract] Accounting Policies [Abstract] Weighted-Average Contractual Life, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Other assets, non-current Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Lease liabilities—total (discounted) Operating Lease, Liability Federal Current Federal Tax Expense (Benefit) Document Transition Report Document Transition Report Common stock, $0.00001 par value; 500,000 shares authorized; 132,553 and 114,029 shares issued at December 31, 2021 and December 31, 2020, respectively, and 132,204 and 114,029 shares outstanding at December 31, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Unrecognized stock-based compensation, period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Restricted stock units outstanding and unvested (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Customer Concentration Risk Customer Concentration Risk [Member] Leases Lessee, Operating Leases [Text Block] Cash consideration, elected increase, percent Payments To Acquire Businesses, Gross, Elected Increase, Percentage Payments To Acquire Businesses, Gross, Elected Increase, Percentage Common stock, issued and outstanding (in shares) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Converted Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Converted Per Acquiree Share Business Combinations Business Combination Disclosure [Text Block] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Other Commitments [Table] Other Commitments [Table] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Product Concentration Risk Product Concentration Risk [Member] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Foreign Deferred Foreign Income Tax Expense (Benefit) Vested but deferred (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested But Deferred, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested But Deferred, Number Legal Entity [Axis] Legal Entity [Axis] Dilutive effect of weighted-average share-based payments (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Goodwill [Line Items] Goodwill [Line Items] Fair value of stock-based awards exchanged Business Combination, Consideration Transferred, Equity Interests Issuable Fair Value Business Combination, Consideration Transferred, Equity Interests Issuable Fair Value Marketable Securities Marketable Securities, Policy [Policy Text Block] Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Pro Forma Net Loss Business Acquisition, Pro Forma Net Income (Loss) Interest (income) expense, net Interest Income (Expense), Net Lease liabilities - current portion Leases, Liabilities, Current Leases, Liabilities, Current Income Tax Authority [Axis] Income Tax Authority [Axis] Fair value appreciation of SpotX purchase right Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Incremental Revolver Incremental Revolver [Member] Incremental Revolver Internal use software development costs, net Internal Use Software Development Costs, Net The carrying amount of internal use software development costs net of accumulated amortization as of the balance sheet date. Entity [Domain] Entity [Domain] Revenue Revenues Revenue from Contract with Customer, Excluding Assessed Tax Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Debt Issuance Costs Amortization of Debt Issuance Costs [Roll Forward] Amortization of Debt Issuance Costs Capitalized computer software, additions Capitalized Computer Software, Additions Stock Option Share-based Payment Arrangement, Option [Member] Evergreen annual % increase Evergreen Annual % Increase Evergreen Annual % Increase Equity [Abstract] Equity [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Measurement Input Type [Domain] Measurement Input Type [Domain] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Variable Rate [Axis] Variable Rate [Axis] Shares issued, elected decrease, percent Business Acquisition, Equity Interest Issued or Issuable, Elected Decrease, Percentage Business Acquisition, Equity Interest Issued or Issuable, Elected Decrease, Percentage Lease liabilities, non-current Leases, Liabilities, Noncurrent Leases, Liabilities, Noncurrent Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Provision for doubtful accounts Accounts Receivable, Bad Debt Expense Accounts Receivable, Bad Debt Expense Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Variable Rate [Domain] Variable Rate [Domain] Additional Paid-In Capital Additional Paid-in Capital [Member] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Repayment of debt Repayments of Debt Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Post merger revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Provision to return adjustments Effective Income Tax Rate Reconciliation, Return Adjustment Provision Effective Income Tax Rate Reconciliation, Return Adjustment Provision Debt utilization triggering leverage ratio compliance, percent Line of Credit Facility, Covenant Compliance, Debt Utilization Triggering Leverage Ratio Compliance, Percentage Line of Credit Facility, Covenant Compliance, Debt Utilization Triggering Leverage Ratio Compliance, Percentage SpotX Acquisition, SpringServe Acquisition, and Telaria Merger SpotX Acquisition, SpringServe Acquisition, And Telaria Merger [Member] SpotX Acquisition, SpringServe Acquisition, And Telaria Merger Other liabilities Increase (Decrease) in Other Operating Liabilities Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Issuance of common stock associated with merger or acquisition Stock Issued During Period, Value, Merger Stock Issued During Period, Value, Merger Investments, Fair Value Disclosure [Abstract] Investments, Fair Value Disclosure [Abstract] Award Type [Axis] Award Type [Axis] Schedules of Maturity of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Customer one Customer One [Member] Customer One [Member] TOTAL STOCKHOLDERS' EQUITY Beginning Balance Ending Balance Stockholders' Equity Attributable to Parent City Area Code City Area Code Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Aggregate Intrinsic Value, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Purchase of treasury stock Payments for Repurchase of Common Stock Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life STOCKHOLDERS' EQUITY Stockholders' Equity Attributable to Parent [Abstract] Lease liabilities - current portion Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Lease, Current Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Lease, Current Liabilities Concentration of Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Aggregate principle amount Debt Instrument, Face Amount Total current provision Current Income Tax Expense (Benefit) Tax benefit on stock-based compensation expense Share-based Payment Arrangement, Expense, Tax Benefit Share Price (in USD per share) Share Price Technology and Development Research, Development, and Computer Software, Policy [Policy Text Block] Term of lease contract Lessee, Operating Lease, Term of Contract Restricted Stock Units (RSUs) Unvested restricted stock units Restricted Stock Units (RSUs) [Member] General and Administrative Selling, General and Administrative Expenses, Policy [Policy Text Block] Stock options exchanged pre-acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Stock Options Exchanged Pre-Acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Stock Options Exchanged Pre-Acquisition Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Total deferred tax liabilities Deferred Tax Liabilities, Gross Business Acquisition [Line Items] Business Acquisition [Line Items] Tranche Two Share-based Payment Arrangement, Tranche Two [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO CONSOLIDATED BALANCE SHEETS: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Income Statement [Abstract] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Total purchase consideration Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Accounts receivable, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Purchase price held back to cover possible indemnification claims Business Combination, Indemnification Assets, Amount as of Acquisition Date Other income Other Operating Income Organization and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Provision (benefit) for income taxes Total provision (benefit) for income taxes Income Tax Expense (Benefit) Basis Of Revenue Recognition [Axis] Basis Of Revenue Recognition [Axis] Basis Of Revenue Recognition Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Tax Identification Number Entity Tax Identification Number Document Fiscal Period Focus Document Fiscal Period Focus TOTAL CURRENT ASSETS Assets, Current Total lease payments (undiscounted) Lessee, Operating Lease, Liability, to be Paid Accounts Receivable Accounts Receivable [Member] Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Personnel related (severance and one-time termination benefit costs) Employee Severance And One-Time Termination Benefits [Member] Employee Severance And One-Time Termination Benefits Customer two Customer Two [Member] Customer Two [Member] Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Intrinsic value of nonvested unit Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Estimated amortization expense, 2023 Capitalized Computer Software, Amortization Expense, Year Two Capitalized Computer Software, Amortization Expense, Year Two Fair Value of Financial Instruments Fair Value Measurement, Policy [Policy Text Block] Less: Current portion Long-term Debt, Current Maturities Unrecognized employee stock-based compensation Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Stock-based compensation expense Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent Unrecognized employee stock-based compensation Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Revenue Benchmark Revenue Benchmark [Member] Weighted average grant date fair value (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Purchase price prior to working capital adjustments Business Combination, Consideration Transferred, Before Working Capital Adjustments Business Combination, Consideration Transferred, Before Working Capital Adjustments Equity Component [Domain] Equity Component [Domain] Merger, acquisition, and restructuring costs Total merger, acquisition, and restructuring costs Restructuring Charges And Business Combination, Acquisition Related Costs Restructuring Charges And Business Combination, Acquisition Related Costs 2023 Amortization Of Debt Issuance Costs, Year Two Amortization Of Debt Issuance Costs, Year Two 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Debt Discount Debt Discount [Member] Debt Discount 2026 Amortization Of Debt Discount (Premium), Year Five Amortization Of Debt Discount (Premium), Year Five Amortization of debt discount Amortization of Debt Discount (Premium) Debt issuance costs, gross Debt Issuance Costs, Gross Stock Consideration (Fair Value of Shares of Magnite common stock) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Cash consideration, elected increase, amount Payments To Acquire Businesses, Gross, Elected Increase, Amount Payments To Acquire Businesses, Gross, Elected Increase, Amount Property and equipment, net Net property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Capital Stock Stockholders' Equity, Policy [Policy Text Block] Historical cost Impairment of Intangible Assets, Finite-lived Restricted cash included in other assets, non-current Restricted Cash, Noncurrent Schedule Of Internal Use Software Costs Schedule Of Internal Use Software Costs [Table Text Block] Schedule of Internal Use Software Costs [Table Text Block] LIABILITIES Liabilities [Abstract] Measurement input, expected dividend payment Measurement Input, Expected Dividend Payment [Member] Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Convertible notes Convertible Debt, Fair Value Disclosures 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Finance lease, liability, current Finance Lease, Liability, Current Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Restricted stock units exchanged pre-acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Restricted Stock Units Exchanged Pre-Acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Restricted Stock Units Exchanged Pre-Acquisition Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Auditor Location Auditor Location Type of Restructuring [Domain] Type of Restructuring [Domain] Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life SpotX, Inc. SpotX, Inc [Member] SpotX, Inc Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Other comprehensive income (loss) Other comprehensive income (loss) Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Title of 12(b) Security Title of 12(b) Security Investment, Name [Domain] Investment, Name [Domain] Mobile Mobile [Member] Mobile [Member] Deferred income taxes Deferred Income Taxes and Tax Credits Common stock, shares authorized (in shares) Common Stock, Shares Authorized Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Issued, Basic Net income (loss) Net Income (Loss) Available to Common Stockholders, Diluted Conversion price (in USD per share) Debt Instrument, Capped Call, Conversion Price Debt Instrument, Capped Call, Conversion Price Title of Individual [Axis] Title of Individual [Axis] Estimated amortization expense, 2024 Capitalized Computer Software, Amortization Expense, Year Three Capitalized Computer Software, Amortization Expense, Year Three Document Type Document Type Eligible accounts receivable Line of Credit Facility, Current Borrowing Capacity Percent of Eligible Accounts Receivable Line of Credit Facility, Current Borrowing Capacity Percent of Eligible Accounts Receivable Third anniversary of grant date Share-based Payment Arrangement, Tranche Four [Member] Share-based Payment Arrangement, Tranche Four Schedule of Nonvested Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Thereafter Amortization Of Debt Discount (Premium), After Year Five Amortization Of Debt Discount (Premium), After Year Five Interest rate Debt Instrument, Interest Rate, Stated Percentage Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving Credit Facility Revolving Credit Facility [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Geographical [Axis] Geographical [Axis] State and Local Jurisdiction State and Local Jurisdiction [Member] Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Vesting [Domain] Vesting [Domain] Supplier [Domain] Supplier [Domain] Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Accounts payable—seller Accounts Payable, Seller, Current Description of balance sheet netting of assets and liabilities per ASC 210-20. Subsequent Events Subsequent Events [Text Block] Cost of revenue Cost of Revenue Issued in merger plus acceleration (in shares) Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Additionally With Acceleration Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Additionally With Acceleration Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Treasury stock at cost, 349 and 0 shares outstanding at December 31, 2021 and December 31, 2020, respectively Treasury Stock, Value Weighted average shares used to compute net income (loss) per share: Denominator adjustment: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Operating lease not yet commenced, amount Lessee, Operating Lease, Lease Not Yet Commenced, Commitment Amount Lessee, Operating Lease, Lease Not Yet Commenced, Commitment Amount Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Deferred Tax Assets: Deferred Tax Assets, Net of Valuation Allowance [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Restructuring charges Restructuring Charges Concentration Risk Type [Axis] Concentration Risk Type [Axis] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Accumulated amortization Capitalized Computer Software, Accumulated Amortization Foreign Tax Authority Foreign Tax Authority [Member] Deferred Tax Liabilities: Deferred Tax Liabilities, Gross [Abstract] Business Combinations Business Combinations Policy [Policy Text Block] Proceeds from Convertible Senior Notes offering Proceeds from Convertible Debt Supplier Concentration Risk Supplier Concentration Risk [Member] Shares retired (in shares) Treasury Stock, Shares, Retired Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Cloud computing software Computer Software, Intangible Asset [Member] Document Period End Date Document 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Alternate Base Rate Alternate Base Rate [Member] Alternate Base Rate Accumulated  Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Schedule of Restructuring and Other Exit Costs Restructuring and Related Costs [Table Text Block] Common stock, shares, outstanding (in shares) Beginning Balance (in shares) Ending Balance (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Entity Central Index Key Entity Central Index Key Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Debt Issuance Costs [Axis] Debt Issuance Costs [Axis] Debt Issuance Costs Expense Lease, Cost Restructuring activity, merger and acquisition loss contracts Restructuring Charges, Merger And Acquisition Assumed Loss Contracts Restructuring Charges, Merger And Acquisition Assumed Loss Contracts Customer relationships Customer relationships Customer Relationships [Member] Fair value of prior investment Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Other permanent items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Other liabilities, non-current Other Liabilities, Noncurrent Acceleration of single trigger equity awards, converted Business Combination, Consideration Transferred, Conversion of Stock, Amount Converted Business Combination, Consideration Transferred, Conversion of Stock, Amount Converted Internal use software development costs, gross Capitalized Computer Software, Gross Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Purchase of treasury stock (in shares) Shares repurchased (in shares) Treasury Stock, Shares, Acquired Debt Instrument [Line Items] Debt Instrument [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Trading Symbol Trading Symbol Accounts Payable Accounts Payable [Member] Schedule of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Roll Forward Schedule of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Roll Forward [Table Text Block] Pro Forma Revenue Business Acquisition, Pro Forma Revenue Accounts Payable and Accrued Expense Accounts Payable and Accrued Liabilities Disclosure [Text Block] Telaria Telaria [Member] Telaria Line of Credit Facility [Table] Line of Credit Facility [Table] Tranche Three Share-based Payment Arrangement, Tranche Three [Member] Sales of available-for-sale securities Proceeds from Sale of Debt Securities, Available-for-sale Debt, non-current, net of debt issuance costs Total non-current debt Long-term Debt, Excluding Current Maturities Schedule of Goodwill [Table] Schedule of Goodwill [Table] Stock-based compensation expense Share-based Payment Arrangement, Expense Cost of Revenue Cost of Goods and Service [Policy Text Block] Convertible Senior Notes Convertible Debt Securities [Member] Weighted-Average Contractual Life, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Research Tax Credit Carryforward Research Tax Credit Carryforward [Member] Restricted cash included in prepaid expenses and other current assets Restricted Cash, Current Payables and Accruals [Abstract] Payables and Accruals [Abstract] Schedule of Income before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Payment terms Revenue, Payment Terms Revenue, Payment Terms Conversion Term (ii) Conversion Term (ii) [Member] Conversion Term (ii) Common stock, par or stated value per share (USD per share) Common Stock, Par or Stated Value Per Share Fair value of units granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Total identifiable intangible assets, gross Finite-Lived Intangible Assets, Gross Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Capitalized computer software, amortization Capitalized Computer Software, Amortization Impairment of Long-Lived Assets including Internal Use Capitalized Software Costs Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Exercise of common stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Debt discount, non-cash Debt Discount Received During Noncash or Partial Noncash Transaction Debt Discount Received During Noncash or Partial Noncash Transaction Recurring Fair Value, Recurring [Member] share-based payment award, award requisite service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Investments Investment Holdings, Schedule of Investments [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Other (income) expense: Nonoperating Income (Expense) [Abstract] Auditor Firm ID Auditor Firm ID Quarterly payments of principle balance (percent) Debt Instrument, Periodic Payment, Percentage Of Principal Debt Instrument, Periodic Payment, Percentage Of Principal Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Changes in operating assets and liabilities, net of effect of business acquisitions: Increase (Decrease) in Operating Capital [Abstract] Capitalized computer software impairments Capitalized Computer Software, Impairments Vested (in USD 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 Share Repurchase One Share Repurchase One [Member] Share Repurchase One Cash Consideration Payments to Acquire Businesses, Gross Intangible assets Deferred Tax Liabilities, Goodwill and Intangible Assets Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Schedule of Finite-lived Intangible Assets Acquired as Part of Business Combination Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Issuance of common stock associated with merger or acquisition (in shares) Stock Issued During Period, Shares, Merger Stock Issued During Period, Shares, Merger Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Alternative investment, measurement input Alternative Investment, Measurement Input Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Conversion Term (i) Conversion Term (i) [Member] Conversion Term (i) Sales and Marketing Sales and Marketing [Policy Text Block] Sales and Marketing [Policy Text Block] Cost of revenue Cost of Sales [Member] Foreign Current Foreign Tax Expense (Benefit) Nature of Operations Nature of Operations [Text Block] Developed technology Developed technology Developed Technology Rights [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Unamortized debt discounts Total Debt Instrument, Unamortized Discount Desktop Desktop [Member] Desktop [Member] Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table]