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Net income (loss) Net loss attributable to Forge Global Holdings, Inc. 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Payment Award, Fair Value Assumptions, Expected Dividend Rate Customer relationships Customer Relationships [Member] Entity Address, City or Town Entity Address, City or Town Leases [Abstract] Redemption price per warrant (in dollars per share) Class Of Warrant Or Right Redemption Price Per Warrant Class Of Warrant Or Right Redemption Price Per Warrant Operating expenses: Operating Expenses [Abstract] Expected term (years) Measurement Input, Expected Term [Member] Issuance of common stock upon release of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Total stockholders’ equity (deficit) Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Consolidation Consolidation, Policy [Policy Text Block] Asset Class [Domain] Asset Class [Domain] Minimum Minimum [Member] Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Less: Accumulated amortization Capitalized Computer Software, Accumulated Amortization Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share 2026 Lessor, Operating Lease, Payment to be Received, Year Four Commitments and Contingencies Disclosure [Abstract] 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 Fair Value Measurements Fair Value Disclosures [Text Block] Share price (in dollars per share) Original Issuance Price (in dollars per share) Share Price 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 Trading Symbol Trading Symbol Entity 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market funds Money Market Funds [Member] Management Expense Management Expense [Member] Management Expense Accumulated Deficit Retained Earnings [Member] 2025 Lessor, Operating Lease, Payment to be Received, Year Three Capitalization [Abstract] Capitalization [Abstract] 2023 Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year One Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year One Stock price meets or exceeds $12.50 Stock Price Trigger One [Member] Stock Price Trigger One Common Stock Common Stock [Member] Shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Class of Stock [Axis] Class of Stock [Axis] Schedule of RSU Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Statement [Table] Statement [Table] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Issuance of common stock upon Merger Stock Issued During Period, Value, Acquisitions Renewal term (in years) Lessee, Operating Lease, Renewal Term Document Quarterly Report Document Quarterly Report Recapitalization [Line Items] Recapitalization [Line Items] Recapitalization [Line Items] Temporary equity, Shares issued (in shares) Temporary Equity, Shares Issued Furniture and fixtures Furniture and Fixtures [Member] Current assets: Assets, Current [Abstract] Lock-up period Share-Based Compensation Arrangement by Share-Based Payment Award, Lock-Up Period Share-Based Compensation Arrangement by Share-Based Payment Award, Lock-Up Period Operating lease liabilities, noncurrent Operating Lease, Liability, Noncurrent Motive Fund Vehicles Investor Motive Fund Vehicles Investor [Member] Motive Fund Vehicles Investor Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and 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