SARs Stock Appreciation Rights (SARs) [Member] Change in fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Net income attributable to noncontrolling interests Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Summary of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Accrued expenses Total accrued expenses Accrued Liabilities, Current Research and development Research and Development Expense Establishment of profits interests liability (see Note 9 – Stock-Based Compensation) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Buttonwood Publishing Buttonwood Publishing [Member] Buttonwood Publishing Award Type [Domain] Award Type [Domain] Remaining performance obligation, timing of satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Summary of Activities of SARs Share-Based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] Outstanding (in shares) Outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Distributions Partners' Capital Account, Distributions Impairment of intangible assets Impairment of Intangible Assets (Excluding Goodwill) Statement of Stockholders' Equity [Abstract] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Operating lease liabilities, noncurrent Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Operating Lease Liabilities, Noncurrent Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Operating Lease Liabilities, Noncurrent Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Impairment on capitalized costs Capitalized Contract Cost, Impairment Loss Credit spread Measurement Input, Credit Spread [Member] Commitments and Contingencies Commitments and Contingencies Volatility Measurement Input, Price Volatility [Member] Sponsor Earn Out Shares Sponsor Earn Out Shares [Member] Sponsor Earn Out Shares Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Cash paid for amounts included in the measurement of lease liabilities: Cash Paid for Amounts Included in the Measurement of Lease Liabilities [Abstract] Cash Paid for Amounts Included in the Measurement of Lease Liabilities Stockholders’ Equity Equity [Text Block] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Geographical [Axis] Geographical [Axis] Income Taxes Income Tax Disclosure [Text Block] Management Earn Out Shares Management Earn Out Shares [Member] Management Earn Out Shares Deferred revenue Increase (Decrease) in Contract with Customer, Liability Ownership [Axis] Ownership [Axis] Vesting of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Current liabilities: Liabilities, Current [Abstract] Preferred stock, par value (USD per share) Preferred Stock, Par or Stated Value Per Share Preferred stock - par value of $0.0001 per share, 100,000,000 shares authorized; 0 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively Preferred Stock, Value, Issued Business Acquisition [Line Items] Business Acquisition [Line Items] Capitalized Contract Cost [Roll Forward] Capitalized Contract Cost [Roll Forward] Capitalized Contract Cost Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] Earnings per share - diluted (USD per share) Diluted earnings per share (USD per share) Earnings Per Share, Diluted Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Accounts receivable Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Goodwill [Roll Forward] Goodwill [Roll Forward] Level 3 Fair Value, Inputs, Level 3 [Member] Amount withheld on behalf of employees Accrued Employee Benefits, Current Trading Symbol Trading Symbol Profits interests, noncurrent Profits Interests, Noncurrent Profits Interests, Noncurrent Profit Interests Profit Interests [Member] Profit Interests Net income (loss) attributable to MarketWise, Inc. Net Income (Loss) Total current liabilities Liabilities, Current Derivative Contract [Domain] Derivative Contract [Domain] Fair Value Disclosures [Abstract] Common stock, conversion ratio Common Stock, Conversion Ratio Common Stock, Conversion Ratio Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Cost Intangible Assets, Gross (Excluding Goodwill) Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Grant Date Fair Value Liabilities and stockholders’ deficit Liabilities and Equity [Abstract] Entity Ex Transition Period Entity Ex Transition Period Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Employee Stock Purchase Plan Employee Stock [Member] Repurchases of stock Stock Repurchased During Period, Value Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Revenue Share Expenses, Call Center Support, and Corporate Functions Revenue Share Expenses, Call Center Support, and Corporate Functions [Member] Revenue Share Expenses, Call Center Support, and Corporate Functions Member Earn Out Shares Member Earn Out Shares [Member] Member Earn Out Shares Summary of Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Commission and variable compensation Accrued Commission And Bonus, Current Accrued Commission And Bonus, Current Acquired finite-lived intangible assets, weighted average useful life (years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Common Stock - Class B Common Stock - Class B Common Class B [Member] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Goodwill Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Summary of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Equity Components [Axis] Equity Components [Axis] Accrued expenses Increase (Decrease) in Accrued Liabilities Profits interests Profits Interests [Member] Profits Interests Entity Small Business Entity Small Business 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Four Local Phone Number Local Phone Number Accounts receivable Increase (Decrease) in Accounts Receivable Unrealized losses (gains) on foreign currency Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Common stock, dividend (in dollars per share) Common Stock, Dividends, Per Share, Declared Transferred at a point in time Transferred at Point in Time [Member] Deferred contract acquisition costs, noncurrent Deferred Costs, Noncurrent Measurement Frequency [Axis] Measurement Frequency [Axis] Operating lease liabilities, noncurrent Operating Lease, Liability, Noncurrent RSUs Restricted Stock Units (RSUs) [Member] Depreciation expense Depreciation Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Warrant Exchange Offer Warrant Exchange Offer [Member] Warrant Exchange Offer Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Issuance of common stock - warrant exchanges Stock Issued During Period, Value, Warrants Exchanged Stock Issued During Period, Value, Warrants Exchanged Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Income Statement Location [Axis] Income Statement Location [Axis] Distributions Noncontrolling Interest, Period Increase (Decrease) Restricted stock units withheld to pay taxes Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Distribution (in dollars per share) Partners' Capital, Distribution Amount Per Share Revenue Revenues Risk-free rate Measurement Input, Risk Free Interest Rate [Member] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Tax receivable agreement liability, noncurrent Tax Receivable Agreement Liability, Noncurrent Tax Receivable Agreement Liability, Noncurrent Product and Service [Domain] Product and Service [Domain] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Award Type [Axis] Award Type [Axis] Derivative Instruments and Hedging Activities Disclosure [Abstract] Granted stock (in shares) Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Plan Name [Domain] Plan Name [Domain] Document Quarterly Report Document Quarterly Report Supplemental Disclosures of Non-Cash Investing and Financing Activities: Noncash Investing and Financing Items [Abstract] 2023 Acquisition 2023 Acquisition [Member] 2023 Acquisition Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] General and administrative General and Administrative Expense [Member] Hedging Designation [Axis] Hedging Designation [Axis] Property and equipment, gross Property, Plant and Equipment, Gross Operating lease right-of-use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Remainder of 2023 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Related Party Transactions Related Party Transactions Disclosure [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Entity File Number Entity File Number Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] MarketWise, LLC Units MarketWise, LLC Units [Member] MarketWise, LLC Units Distribution (in dollars per share) Distribution Made to Limited Liability Company (LLC) Member, Distributions Declared, Per Unit Discount Rate Measurement Input, Discount Rate [Member] Summary of Activities of RSUs Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Operating lease liabilities Operating Lease, Liability, Current Prepaid expenses Prepaid Expense, Current Issued stock (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Related party receivables and payables, net Increase (Decrease) In Due To (Due From) Related Parties Increase (Decrease) In Due To (Due From) Related Parties Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Amortization of intangible assets Amortization of Intangible Assets Entity Shell Company Entity Shell Company Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Net Book Value Finite-Lived Intangible Assets, Net Prepaid expenses Increase (Decrease) in Prepaid Expense Counterparty Name [Domain] Counterparty Name [Domain] Other current and long-term liabilities Increase (Decrease) in Other Operating Liabilities Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Cash, cash equivalents and restricted cash — beginning of period Cash, cash equivalents and restricted cash — end of period Total Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant accounting policies [Line Item]. Tax savings rate Tax Receivable Agreement Liability, Percent Of Calculated Tax Savings Tax Receivable Agreement Liability, Percent Of Calculated Tax Savings Common stock, issued (in shares) Common Stock, Shares, Issued Deferred revenue – current Contract with Customer, Liability, Current Security Exchange Name Security Exchange Name Issuance per redemption of Class B shares for Class A Stock Redeemed or Called During Period, Value Total assets Assets, Fair Value Disclosure Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Fair Value Measurements Inputs Schedule Of Warrants And Rights Outstanding, Valuation Assumptions [Table Text Block] Schedule Of Warrants And Rights Outstanding, Valuation Assumptions Common Stock - Class A Common Stock - Class A Common Class A [Member] Total operating expenses Costs and Expenses Warrants redemption price per share (USD per share) Class of Warrants or Right, Redemption of Warrants When Price Per Share Equals or Exceeds Value Warrants, redemption price per share. Document Type Document Type Acquisition Goodwill, Acquired During Period Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Entity Address, Address Line One Entity Address, Address Line One Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Subsequent Event [Table] Subsequent Event [Table] Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Number Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Ownership percentage Subsidiary, Ownership Percentage, Parent Capitalized costs, beginning balance Capitalized costs, ending balance Capitalized Contract Cost, Net Unaudited Interim Financial Information Basis of Accounting, Policy [Policy Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Subsequent Event Subsequent Event [Member] Derivative [Table] Derivative [Table] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Other current liabilities Other Liabilities, Current Royalties and sales commissions – additions Capitalized Contract Cost, Additions, Royalties And Sales Commissions Capitalized Contract Cost, Additions, Royalties And Sales Commissions Income Statement [Abstract] Proceeds from issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Title of 12(b) Security Title of 12(b) Security Additions to capitalized software development costs Capitalized Computer Software, Additions Money market funds Cash and Cash Equivalents, Fair Value Disclosure Acquisitions Business Combination Disclosure [Text Block] Related Party [Domain] Related Party, Type [Domain] Number of shares called by each warrant (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Noncontrolling Interest Stockholders' Equity, Policy [Policy Text Block] Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Noncontrolling interest ownership percentage Ownership percentage Subsidiary, Ownership Percentage, Noncontrolling Owner Outstanding (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 Equity-based compensation Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Other current assets Other Assets, Current Class of Stock [Line Items] Class of Stock [Line Items] Income Tax Disclosure [Abstract] Right of use asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right of Use Asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right of Use Asset Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Revenue share and cost per acquisition fees – additions Capitalized Contract Cost, Additions, Revenue Share Fees Capitalized Contract Cost, Additions, Revenue Share Fees Amortization of capitalized costs Capitalized Contract Cost, Amortization Class of warrants or right, number of warrants exchanged (in shares) Class Of Warrants Or Right, Number Of Warrants Exchanged Class Of Warrants Or Right, Number Of Warrants Exchanged Distributions to noncontrolling interests Proceeds from (Payments to) Noncontrolling Interests Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Change to uncertain tax positions within the next 12 months Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Repurchases of stock Repurchases of stock Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Marketwise, LLC Marketwise, LLC [Member] Marketwise, LLC Summary of Capitalized Costs Associated with Contracts With Customers Capitalized Contract Cost [Table Text Block] Total Stockholders’ Deficit Attributable to MarketWise, Inc. Parent [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Accumulated deficit Retained Earnings (Accumulated Deficit) Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current assets: Assets, Current [Abstract] Trade and other payables Accounts Payable and Other Accrued Liabilities, Current Entity Address, State or Province Entity Address, State or Province Counterparty Name [Axis] Counterparty Name [Axis] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Operating lease liabilities, current Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed,Operating Lease Liabilities, Current Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed,Operating Lease Liabilities, Current Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year One Operating cash flows from operating leases Operating cash flows from operating leases Operating Lease, Payments Common stock, outstanding (in shares) Common stock, beginning balance (in shares) Common stock, ending balance (in shares) Common Stock, Shares, Outstanding Earn out shares (in shares) Reverse Recapitalization, Contingent Consideration, Equity, Shares Reverse Recapitalization, Contingent Consideration, Equity, Shares Discount for lack of marketability Measurement Input, Discount for Lack of Marketability [Member] Private Warrants Private Placement Warrants [Member] Private placement warrants. Common stock, par value (USD per share) Common Stock, Par or Stated Value Per Share Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] Net income attributable to Class A common stockholders Net Income (Loss) Available to Common Stockholders, Basic Derivative liabilities, noncurrent Derivative Liability, Noncurrent Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Total lease liabilities Operating Lease, Liability Measurement Input Type [Domain] Measurement Input Type [Domain] Total liabilities Liabilities Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Other Phantom Interests in Net Income Other Contract [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Measurement Frequency [Domain] Measurement Frequency [Domain] Deferred revenue and other contract liabilities, noncurrent Deferred revenue – non-current Contract with Customer, Liability, Noncurrent Plan Name [Axis] Plan Name [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Earnings Per Share [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Sales and marketing Selling and Marketing Expense Common stock Common Stock, Value, Issued General and administrative General and Administrative Expense Organization, Consolidation and Presentation of Financial Statements [Abstract] Tradenames Tradenames Trade Names [Member] Revenue Share Revenue Share [Member] Revenue Share Total current assets Assets, Current Acquisition of noncontrolling interest - Chaikin Members' Deficit, Decrease From Acquisition Of Noncontrolling Interest Members' Deficit, Decrease From Acquisition Of Noncontrolling Interest Preferred Stock Preferred Stock [Member] Impairment and other charges Asset Impairment Charges Restricted cash Restricted Cash Tax receivable agreement, percent of calculated tax savings retained Tax Receivable Agreement, Percent Of Calculated Tax Savings Retained Tax Receivable Agreement, Percent Of Calculated Tax Savings Retained Revenue from Contract with Customer [Abstract] Supplemental Disclosures of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Membership subscriptions Membership Subscriptions [Member] Membership Subscriptions 2021 Incentive Award Plan 2021 Incentive Award Plan [Member] 2021 Incentive Award Plan Other income (expense), net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Stock, issued (in shares) Capital Stock, Shares Issued Capital Stock, Shares Issued Statement [Table] Statement [Table] Computers, software and equipment Computers, Software And Equipment [Member] Computers, Software And Equipment Current Fiscal Year End Date Current Fiscal Year End Date Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Share repurchase program, amount authorized Stock Repurchase Program, Authorized Amount Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Repurchases of stock (in shares) Shares repurchased (in shares) Stock Repurchased During Period, Shares Unrecognized tax positions Unrecognized Tax Benefits Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Warrants outstanding (in shares) Class of Warrant or Right, Outstanding Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Marketing and Copywriting Services Marketing and Copywriting Services [Member] Marketing and Copywriting Services Granted (in USD 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 Schedule of Goodwill Schedule of Goodwill [Table Text Block] Preferred stock, outstanding (in shares) Preferred stock, beginning balance (in shares) Preferred stock, ending balance (in shares) Preferred Stock, Shares Outstanding Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Class of Stock [Axis] Class of Stock [Axis] Other accrued expenses Other Accrued Liabilities, Current Gain (loss) on derivative warrant liabilities Fair Value Adjustment of Warrants Warrant Exchange Derivatives and Fair Value [Text Block] Acquisition of noncontrolling interests, including transaction costs Payments to Acquire Additional Interest in Subsidiaries Deferred contract acquisition costs Deferred Costs, Current Depreciation and amortization Depreciation, Depletion and Amortization Percentage of outstanding warrants Percentage of Outstanding Warrants Percentage of Outstanding Warrants Furniture and fixtures Furniture and Fixtures [Member] Capitalized software development costs Payments to Develop Software Transferred over time Transferred over Time [Member] Statement of Financial Position [Abstract] Business Acquisition [Axis] Business Combination and Asset Acquisition [Abstract] Total stockholders’ deficit attributable to MarketWise, Inc. Equity, Attributable to Parent Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Valuation allowance Deferred Tax Assets, Valuation Allowance Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Contract liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Cumulative translation adjustment Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Internet domain names Internet Domain Names [Member] Subsequent Events [Abstract] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Fees and commissions Payments For Repurchase Of Common Stock, Fees And Commissions Payments For Repurchase Of Common Stock, Fees And Commissions Derivatives Not Designated as Hedging Instruments Not Designated as Hedging Instrument [Member] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Preferred stock, issued (in shares) Preferred Stock, Shares Issued Hedging Designation [Domain] Hedging Designation [Domain] Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Capitalized cloud computing implementation costs amortization expense Hosting Arrangement, Service Contract, Implementation Cost, Expense, Amortization Level 2 Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Class of warrant or right, expense recognized Class of Warrant or Right, Expense Recognized Class of Warrant or Right, Expense Recognized Intangible assets, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Recording of deferred tax assets and capital contribution related to exchanges of Class B common stock to Class A common stock Deferred Tax Assets And Capital Contribution Related to Exchanges Deferred Tax Assets And Capital Contribution Related to Exchanges Summary of Derivative Instruments, Gains (Losses) Derivative Instruments, Gain (Loss) [Table Text Block] Stockholders' Deficit Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Document Fiscal Period Focus Document Fiscal Period Focus Antidilutive Securities [Axis] Antidilutive Securities [Axis] Operating lease, expense Operating Lease, Expense Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Common Stock Common Stock [Member] Deferred revenue, noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deferred Revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deferred Revenue City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Product and Service [Axis] Product and Service [Axis] Earnings Per Share Earnings Per Share [Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Schedule of Changes in Fair Value of Liabilities Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Geographical [Domain] Geographical [Domain] Total stockholders’ deficit Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Deferred revenue and other contract liabilities Contract With Customer, Liability, Including Refund Liability, Current Contract With Customer, Liability, Including Refund Liability, Current Property and equipment, net Total property and equipment, net Property, Plant and Equipment, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Statement of Cash Flows [Abstract] Profit interests, measurement input Profit Interests, Measurement Input Profit Interests, Measurement Input Cash dividends declared Dividends, common stock Dividends, Common Stock, Cash Assets Assets [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total liabilities Liabilities, Fair Value Disclosure Operating lease liabilities Increase (Decrease) in Operating Lease Liability Nonrelated Party Nonrelated Party [Member] Restricted stock units withheld to pay taxes Payment, Tax Withholding, Share-Based Payment Arrangement Stock, authorized (in shares) Capital Stock, Shares Authorized Capital Stock, Shares Authorized Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Deferred tax assets Deferred Income Tax Assets, Net Percentage of interests acquired Business Acquisition, Percentage of Voting Interests Acquired Accumulated deficit Retained Earnings [Member] Reconciliation of Cash and Cash Equivalents and Restricted Cash: Reconciliation of Cash and Cash Equivalents and Restricted Cash [Abstract] Reconciliation of Cash and Cash Equivalents and Restricted Cash Summary of Stock-Based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Total liabilities, noncontrolling interest, and stockholders’ deficit Liabilities and Equity Other assets Other Assets, Noncurrent Ownership [Domain] Ownership [Domain] Weighted-Average Remaining Useful Life (in years) Finite-Lived Intangible Assets, Remaining Amortization Period Earnings per share - basic (USD per share) Basic earnings per share (USD per share) Earnings Per Share, Basic Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Issued stock Stock Issued During Period, Value, Employee Stock Purchase Plan Accounting Policies [Abstract] Warrants exercised (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Net income attributable to Class A common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Entity Address, City or Town Entity Address, City or Town Related Party Related Party [Member] Related party expense Costs and Expenses, Related Party RSU and SAR RSU and SAR [Member] RSU and SAR Non-subscription revenue Non-Subscription Revenue [Member] Non-Subscription Revenue Basis of Consolidation Consolidation, Policy [Policy Text Block] Term subscriptions Term Subscriptions [Member] Term Subscriptions Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Document Transition Report Document Transition Report Deferred contract acquisition costs capitalized during the period Deferred Contract Acquisition Costs Capitalized During The Period Deferred Contract Acquisition Costs Capitalized During The Period Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Aggregate value of shares to be repurchased Stock Repurchase Program, Remaining Authorized Repurchase Amount Fees and Accounting and Marketing Services Revenue Fees And Accounting And Marketing Services Revenue [Member] Fees And Accounting And Marketing Services Revenue Issuance of common stock - warrant exchanges (in shares) Stock Issued During Period, Shares, Warrant Exchanged Stock Issued During Period, Shares, Warrant Exchanged Trade and other payables Increase (Decrease) in Accounts Payable Common stock, authorized (in shares) Common Stock, Shares Authorized Derivative liabilities, measurement input Derivative Liability, Measurement Input Amortization of capitalized software development costs Capitalized Computer Software, Amortization Document Information [Table] Document Information [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Liability Class [Axis] Liability Class [Axis] Related Party Transactions [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Derivative [Line Items] Derivative [Line Items] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant accounting policies. Warrant Amendment Warrant Amendment [Member] Warrant Amendment Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Additional paid-in capital Additional Paid in Capital Stockholders’ deficit Limited Liability Company (LLC) Members' Equity [Abstract] Revenue Share Expenses Revenue Share Expenses [Member] Revenue Share Expenses Forfeited (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 Deferred taxes Deferred Income Tax Expense (Benefit) Document Information [Line Items] Document Information [Line Items] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statement of Comprehensive Income [Abstract] Derivative Instruments Derivative Financial Instruments, Liabilities [Member] Call Center Support And Other Services Expense Call Center Support And Other Services Expense [Member] Call Center Support And Other Services Expense Warrants exchanged for Class A common stock (see Note 15 – Warrant Exchange) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warrants Exchanged for Class A Common Stock Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warrants Exchanged for Class A Common Stock Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Denominator: Denominator [Abstract] Denominator Obligations for refunds Contract with Customer, Refund Liability Related Party [Axis] Related Party, Type [Axis] Entity Registrant Name Entity Registrant Name Other current assets and other assets Increase (Decrease) in Other Operating Assets 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two Indefinite-lived intangible assets: Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] Cost of revenue Cost of Sales [Member] Noncontrolling interest Equity, Attributable to Noncontrolling Interest Document Period End Date Document Period End Date Deferred revenue, current Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Entity Central Index Key Entity Central Index Key Liabilities: Liabilities, Fair Value Disclosure [Abstract] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Derivative gains (losses) Derivative, Gain (Loss) on Derivative, Net Total stock-based compensation expense Share-Based Payment Arrangement, Expense Cost Finite-Lived Intangible Assets, Gross Advertising Advertising [Member] Income tax expense Income Tax Expense (Benefit) International Non-US [Member] Remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Fair Value Measurements Fair Value Disclosures [Text Block] Summary of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Proceeds from issuance of common stock Stock Issued During Period, Value, New Issues Equity [Abstract] Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Net revenue Revenue from Contract with Customer, Excluding Assessed Tax Related party receivables Other Receivables, Net, Current Amendment Flag Amendment Flag Finite-lived intangible assets: Finite-Lived Intangible Assets, Net [Abstract] Money market funds Money Market Funds [Member] Change in fair value of warrant liabilities and other liabilities, noncurrent Unrealized Gain (Loss) on Derivatives Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash paid for acquisitions, net of cash acquired Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Assets: Assets, Fair Value Disclosure [Abstract] Vested (RSUs) or Exercised (SARs) (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Exercised Or Vested In Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Exercised Or Vested In Period Corporate Functions Corporate Functions [Member] Corporate Functions Estimated Useful Lives Property, Plant and Equipment, Useful Life Numerator: Numerator [Abstract] Numerator Leasehold improvements Leasehold Improvements [Member] Noncash lease expense Noncash Lease Expense Noncash Lease Expense Sales and marketing Selling and Marketing Expense [Member] Weighted average shares outstanding - diluted (in shares) Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Capitalized software development costs Software Development [Member] Number of common units redeemed for each share of Class A common stock repurchased (in shares) Number of Common Units Redeemed for Each Share of Class A Common Stock Repurchased Number of Common Units Redeemed for Each Share of Class A Common Stock Repurchased Summary of Contract Balances Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Interest income (expense), net Interest (expense) income, net Interest Income (Expense), Nonoperating, Net Operating expenses: Operating Expenses [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Additional paid-in capital Additional Paid-in Capital [Member] Stock issued during period, conversion of units (in shares) Stock Issued During Period, Shares, Conversion of Units Shares issued after withholding for tax (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Stock, outstanding (in shares) Capital Stock, Shares Outstanding Capital Stock, Shares Outstanding Total assets Assets Cover [Abstract] Capitalized software included in accounts payable Capitalized Software Costs Incurred But Not Yet Paid Capitalized Software Costs Incurred But Not Yet Paid Subsequent Events Subsequent Events [Text Block] United States UNITED STATES Recurring Fair Value, Recurring [Member] Operating lease right-of-use assets obtained in exchange for lease obligations from acquisitions Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Acquisitions Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Acquisitions Deferred contract acquisition costs Increase (Decrease) in Deferred Charges Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Dividends paid Payments of Dividends Other liabilities, noncurrent Other Liabilities, Noncurrent Vested (RSUs) or Exercised (SARs) (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 Summary of Supplemental Cash Flow Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Common stock, number of votes per share Common Stock Voting Rights, Number Of Votes Common Stock Voting Rights, Number Of Votes Subscriptions Subscription and Circulation [Member] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Issuance per redemption of Class B shares for Class A (in shares) Issuance per redemption of Class B shares for Class A (in shares) Stock Redeemed or Called During Period, Shares Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Warrants Warrant Contract [Member] Warrant Contract Impairment of intangible assets Goodwill and Intangible Asset Impairment Equity Component [Domain] Equity Component [Domain] Distributions Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid Purchase price of common stock, percent of fair market value Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Related party notes receivable, current Accounts and Financing Receivable, after Allowance for Credit Loss, Current Weighted average shares outstanding - basic (in shares) Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Income from operations Operating Income (Loss) Proceeds from related party notes receivable, net Proceeds From Collection Of Related Party Note Receivable Proceeds From Collection Of Related Party Note Receivable Cost of revenue Cost of Revenue Public Warrants Public Warrants [Member] Public Warrants [Member]. Related Party Transaction [Axis] Related Party Transaction [Axis] Statement [Line Items] Statement [Line Items] Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Customer relationships Customer relationships Customer Relationships [Member] Percentage of warrants outstanding exchange ratio Percentage of Warrants Outstanding Exchange Ratio Percentage of Warrants Outstanding Exchange Ratio Cloud computing implementation costs capitalized during the period Cloud Computing Implementation Costs Capitalized During the Period Cloud Computing Implementation Costs Capitalized During the Period Class A Unitholder Note Issued April 2020 Class A Unitholder Note Issued April 2020 [Member] Class A Unitholder Note Issued April 2020 Payroll and benefits Accrued Payroll And Benefits, Current Accrued Payroll And Benefits, Current Noncontrolling Interest Noncontrolling Interest [Member]