Warrants issued in connection with FPA Warrants Issued in Connection with FPA Warrants Issued in Connection with FPA 2022 ESPP 2022 ESPP [Member] 2022 ESPP Leasehold improvements Leasehold Improvements [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net (loss) income and comprehensive (loss) income Net loss Net (loss) income and comprehensive (loss) income Net Income (Loss) Attributable to Parent Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Pre-close exercise of vested options Stock Issued During Period, Value, Vested, Stock Optioned Exercised Stock Issued During Period, Value, Vested, Stock Optioned Exercised Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Recapitalization [Table] Recapitalization [Table] Recapitalization Financial Technology Partners Financial Technology Partners [Member] Financial Technology Partners Early excercise of common stock options upon settlement of related 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Payment Award [Table] Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Class EE-1 Common Stock Class EE-1 Common Stock [Member] Class EE-1 Common Stock Launched IPR&D assets In Process Research and Development [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity File Number Entity File Number Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Public Utility, Property, Plant and Equipment [Table] Public Utility, Property, Plant and Equipment [Table] Public Warrants Public Warrant [Member] Public Warrant Number of Votes per share 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Options, Exercisable, Number Warrants to purchase convertible preferred stock (in shares) Class of Warrant or Right, Number of Convertible Preferred Securities Called by Warrants or Rights Class of Warrant or Right, Number of Convertible Preferred Securities Called by Warrants or Rights Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Stock options issued and outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Trade name Trade Names [Member] Accumulated Deficit Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets IRA Services IRA Services [Member] IRA Services Advertising and market development Marketing and Advertising Expense Interest expenses and other income (expenses): Interest Expense [Abstract] Commitments 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balance (in shares) Shares, Outstanding Vested and exercisable, end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Share-based Payment Arrangement [Text Block] Public Utility, Property, Plant and Equipment [Line Items] Public Utility, Property, Plant and Equipment [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Accounting Policies [Abstract] Weighted- Averages Life (Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Common Stock, Conversion Ratio Into Shares Of Preferred Stock Common Stock, Conversion Ratio Into Shares Of Preferred Stock Common Stock, Conversion Ratio Into Shares Of Preferred Stock Insurance Fund Expense Insurance Fund Expense [Member] Insurance Fund Expense Payments for offering costs Payments of Stock Issuance Costs Conversion of preferred stock to common stock (in shares) Shares issued (in shares) Stock Issued During Period, Shares, New Issues Lock up period Share-based Compensation Arrangement by Share-based Payment Award, Options, Lock Up Days Share-based Compensation Arrangement by Share-based Payment Award, Options, Lock Up Days 2026 Lessor, Operating Lease, Payment to be Received, Year Four Accrued professional services Accrued Professional Fees, Current Present value of future lease payments Operating Lease, Liability Document Transition Report Document Transition Report Common stock, $0.0001 par value; 169,223,826 and 63,301,388 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively Common Stock, Value, Issued Total interest expenses and other expenses Nonoperating Income (Expense) Purchase commitment amount Long-term Purchase Commitment, Amount Period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Commitments and contingencies (Note 8) Commitments and Contingencies Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting Policies [Line Items] Leases Lessee, Operating Leases [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Medium-term Notes Medium-term Notes [Member] Remainder of 2022 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Restricted Stock Restricted Stock [Member] Schedule of Valuation Assumptions Using Black-Scholes Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Legal Entity [Axis] Legal Entity [Axis] Cover [Abstract] Class of Stock [Axis] Class of Stock [Axis] Numerator: Net 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Issuance of common stock upon settlement of promissory notes Stock Issued Pre-close exercise of unvested options Stock Issued During Period, Value, Unvested, Stock Optioned Exercised Stock Issued During Period, Value, Unvested, Stock Optioned Exercised Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Other current liabilities Other Liabilities, Current Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Warrants Warrants And Rights Note Disclosure [Text Block] Warrants And Rights Note Disclosure Total liabilities Liabilities Private placement proceeds receivable Private Placement Proceeds Receivable Private Placement Proceeds Receivable Fixed monetary amount Fixed Monetary Amount Fixed Monetary Amount Award Type [Axis] Award Type [Axis] 2023 Finite-Lived Intangible Asset, Expected Amortization, Year One Recapitalization of Legacy Forge common stock 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Code City Area Code Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Aggregate intrinsic value, vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Total proceeds threshold Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Threshold, Sale Of Stock Proceeds Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Threshold, Sale Of Stock Proceeds Goodwill and Intangible Assets Disclosure [Abstract] Expected term (years) Measurement Input, Expected Term [Member] Entity Address, City or Town Entity Address, City or Town Settlement of related party promissory notes Gain (Loss) on Extinguishment of Debt Liabilities, convertible preferred stock and stockholders’ equity (deficit) Stockholders' Equity Attributable to Parent [Abstract] Supplemental disclosures of cash flow information: Noncash 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Entity Registrant Name Entity Registrant Name Asset Class [Domain] Asset Class [Domain] Conversion of May 2020 and October 2020 preferred stock warrants of Legacy Forge to common stock warrants Conversion of Preferred Stock Warrants to Common Stock Warrants Conversion of Preferred Stock Warrants to Common Stock Warrants Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Number of common stock classes Number of Common Stock Classes Number of Common Stock Classes Accrued payments related to acquisitions and financing Accrued Payments Related To Acquisitions and Financing, Current Accrued Payments Related To Acquisitions and Financing, Current Trade name – website domain (forge.com) Indefinite-lived Intangible Assets (Excluding Goodwill) Proceeds from exercise of options, including proceeds from repayment of promissory notes Proceeds from Stock 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Identification Number Entity Tax Identification Number Junior Junior Convertible Preferred Stock [Member] Junior Convertible Preferred Stock Fair Value Disclosures [Abstract] Payment-dependent notes payable, current Payment-Dependent Notes Payable, Current, Fair Value Disclosure Payment-Dependent Notes Payable, Current, Fair Value Disclosure Antidilutive Securities [Axis] Antidilutive Securities [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Investments Investments [Member] Sale of Stock [Domain] Sale of Stock [Domain] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Technology and communications Communications and Information Technology 2020 Loan and Security Agreement 2020 Loan and Security Agreement [Member] 2020 Loan and Security Agreement Conversion of May 2020 and October 2020 preferred stock warrants of Legacy Forge to common stock warrants Adjustments to Additional Paid in Capital, Warrant Issued Statement of Financial Position [Abstract] Less: undistributed earnings attributable to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Schedule of Common Stock Reserved for Future Issuance Schedule of Common Stock Reserved for Future Issuance [Table Text Block] Schedule of Common Stock Reserved for Future Issuance Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Product and Service [Axis] Product and Service [Axis] Schedule of Warrants Outstanding Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Cash flows from financing activities: Net 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Equity Sale of unit, number of warrants in each unit Sale Of Units, Number Of Warrants In Each Unit Sale Of Units, Number Of Warrants In Each Unit Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Conversion of preferred stock to common stock (in shares) Temporary Equity, Shares, Conversion of Convertible Securities Temporary Equity, Shares, Conversion of Convertible Securities Counterparty Name [Domain] Counterparty Name [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Gross Carrying Amount Intangible Assets, Gross (Excluding Goodwill) Debt Disclosure [Abstract] (Loss) income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Expected dividend yield Measurement Input, 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Revenues [Abstract] Document Period End Date Document Period End Date Sale of units (in shares) Sale Of Units, Number Of Shares In Each Unit Sale Of Units, Number Of Shares In Each Unit Issuance of Public and Private Warrants Issuance of Public and Private Warrants [Member] Issuance of Public and Private Warrants Payments to acquire intangible assets Payments to Acquire Intangible Assets 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] Automatic increase period Common Stock, Capital Shares Reserved For Future Issuance, Automatic Increase Period Common Stock, Capital Shares Reserved For Future Issuance, Automatic Increase Period Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Schedule of Useful Lives for Property and Equipment Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Transaction expenses related to the Merger Noncash Merger Related Costs Customer relationships Customer Relationships [Member] Temporary equity, Shares issued (in shares) Temporary Equity, Shares Issued Issuance of Series B-1 convertible preferred stock upon conversion of convertible notes and accrued interest (in shares) Temporary Equity, Issuance of Stock Upon Conversion, Shares Temporary Equity, Issuance of Stock Upon Conversion, Shares Conversion of preferred stock to common stock Temporary Equity, Value, Conversion of Convertible Securites Temporary Equity, Value, Conversion of Convertible Securites Series B-1 Series B-1 Convertible Preferred Stock [Member] Series B-1 Convertible Preferred Stock Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Total operating expenses Operating Expenses Vested stock expiration period Share-based Compensation Arrangement by Share-based Payment Award, Vested Stock Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Vested Stock Expiration Period Issuance of common stock upon Merger (net of redemptions), including PIPE and A&R FPA investors, net of transaction costs (in shares) Stock Issued During Period, Shares, Reverse Recapitalization Stock Issued During Period, Shares, Reverse Recapitalization Capitalized internal-use software Capitalized Computer Software, Gross Temporary equity, liquidation preference Temporary Equity, Liquidation Preference Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Trading Symbol Trading Symbol Net (loss) income per share attributable to common stockholders: Earnings Per Share [Abstract] 2025 Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Three Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Three 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Options, Outstanding, Weighted Average Exercise Price Warrant Warrant [Member] Warrant term Warrants and Rights Outstanding, Term Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Share-based compensation expense Share-based Payment Arrangement, Expense Transaction-Based Expenses Cost of Goods and Service [Policy Text Block] Convertible notes Convertible Debt Securities [Member] Weighted-average life, vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Entity Current Reporting Status Entity Current Reporting Status Net (loss) income per share attributed to common stockholders: Earnings Per Share, Basic and Diluted [Abstract] Risk-free interest rate Measurement Input, Risk Free Interest Rate [Member] Accrued expenses and 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Current, Fair Value Disclosure Number of stock classes Number of Stock Classes Number of Stock Classes Unissued common stock (in shares) Unissued Common Stock Unissued Common Stock Current assets: Assets, Current [Abstract] Deferred offering costs accrued and not yet paid Deferred Offering Expenditures Accrued but Not Yet Paid Deferred Offering Expenditures Accrued but Not Yet Paid Gross Carrying Amount Finite-Lived Intangible Assets, Gross Total shares of common stock reserved Total shares of common stock reserved Common Stock, Capital Shares Reserved for Future Issuance Leases [Abstract] Transaction-based expenses: Cost of Goods and Services Sold [Abstract] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] October 2020 Warrants October 2020 Warrants [Member] October 2020 Warrants Capitalized internal-use software amortization expense Capitalized Computer Software, Amortization Cash and cash equivalents: Cash and Cash Equivalents, Fair Value Disclosure Entity Address, Postal Zip Code Entity Address, Postal Zip Code Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Issuance of Class AA common stock upon exercise of vested stock options, including stock options exercised via promissory notes (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Diluted (in shares) Dilutive effect of common share equivalents (in shares) Weighted Average Number of Shares Outstanding, Diluted Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Warrant liabilities Warrants and Rights Outstanding Fair Value, Recurring Fair Value, Recurring [Member] Income Taxes Income Tax Disclosure [Text Block] Warrants to purchase stock (in shares) Class of Warrant or Right, Number of Common Securities Called by Warrants or Rights Class of Warrant or Right, Number of Common Securities Called by Warrants or Rights Weighted-average shares used in computing net (loss) income per share attributable to common stockholders: Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Non-cash assets acquired in the Merger Noncash or Part Noncash Acquisition, Value of Assets Acquired Schedule of Stock Option Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] 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] Series B-2 Series B-2 Convertible Preferred Stock [Member] Series B-2 Convertible Preferred Stock Capitalized Internal-Use Software, Net Capitalized Contract Cost [Table Text Block] Statement of Cash Flows [Abstract] Class of Stock [Line Items] Class of Stock [Line Items] Indefinite-lived intangible assets: Indefinite-lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Entity Address, Address Line Two Entity Address, Address Line Two Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Prepaid Expenses and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Consolidation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Common Stock and Preferred Stock Warrants Common Stock and Preferred Stock Warrants [Member] Common Stock and Preferred Stock Warrants Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Employee Stock Employee Stock [Member] Class of Stock [Domain] Class of Stock [Domain] Reverse Recapitalization [Abstract] Recapitalization [Abstract] Temporary Equity [Line Items] Temporary Equity [Line Items] Money market funds Money Market Funds [Member] Interest thresholds percentage Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Threshold, Interest Rate Compounded Percentage Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Threshold, Interest Rate Compounded Percentage Percentage of outstanding stock Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Current Fiscal Year End Date Current Fiscal Year End Date James Herbert II James Herbert II [Member] James Herbert II Payment-dependent notes payable, noncurrent Payment-Dependent Notes Payable, Noncurrent, Fair Value Disclosure Payment-Dependent Notes Payable, Noncurrent, Fair Value Disclosure Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Other current assets Other Assets, Current Fair value per warrant Measurement Input, Value Of Warrant [Member] Measurement Input, Value Of Warrant Statement [Table] Statement [Table] Recently Adopted and Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Share-based compensation, unvested stock options Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Capitalized internal-use software development costs Payments for Software Accounts Receivable, Net Accounts Receivable [Policy Text Block] Total Finite-Lived Intangible Assets, Net Expected volatility Measurement Input, Price Volatility [Member] Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Warrants measurement input Warrants and Rights Outstanding, Measurement Input 2025 Lessor, Operating Lease, Payment to be Received, Year Three Sale of units, price per unit (in dollars per unit) Sale Of Units, Price Per Unit Sale Of Units, Price Per Unit Adjustments to reconcile net loss to net cash provided by operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Convertible notes payable Notes Payable, Related Parties Developed technology Developed Technology Rights [Member] Aggregate exit proceeds fair market value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Threshold, Share Price Share-based Compensation Arrangement by 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Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table]