Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Beneficial Owner Beneficial Owner [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Carrying value Reported Value Measurement [Member] Interest on loans Interest Income, Loans, Consumer Represents interest income on loans issued to consumers. Net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Weighted average interest rate (as a percent) Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Secured financing (Note 8) Lines of Credit, Fair Value Disclosure Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Schedule of Future Amortization Expense Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Common stock, $0.0001 par value - 1,000,000,000 shares authorized at June 30, 2026 and December 31, 2025; 46,222,056 shares issued and 45,950,033 shares outstanding at June 30, 2026; 44,709,065 shares issued and 44,437,042 shares outstanding at December 31, 2025 Common Stock, Value, Issued Year one Lessee, Operating Lease, Liability, to be Paid, Year One Depreciation and amortization Depreciation, Amortization and Accretion, Net Trademarks Trademarks [Member] Interest income Interest and Fee Income, Loans, Consumer [Abstract] Loss contingency accrual Loss Contingency Accrual Credit Facility Line of Credit [Member] Restatement Determination Date Restatement Determination Date Accrued compensation Employee-related Liabilities Origination fees for loans receivable at fair value, net Amortization of Deferred Loan Origination Fees, Net Right of use assets obtained in exchange for operating lease obligations Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Net Of Impairments Right-Of-Use Asset Obtained In Exchange For Operating Lease Liability, Net Of Impairments Vesting of restricted stock units, net of shares withheld (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross charge-offs Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Write-Offs Amount of write-offs of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Intangible Asset, Finite-Lived, Acquired [Line Items] Intangible Asset, Finite-Lived, Acquired [Line Items] Leases Short-Term Leases [Policy Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Related Party Transactions Related Party Transactions Disclosure [Text Block] Non-cash financing activities Other Noncash Financing Activities Other Noncash Financing Activities Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Oportun Issuance Trust (Series 2021-B) Asset-Backed Notes Series 2021-B [Member] Asset-Backed Notes Series 2021-B PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Oportun Issuance Trust 2025-B Asset-backed Notes Series 2025-B [Member] Asset-backed Notes Series 2025-B Oportun PLW III Trust Secured financing Secured Warehouse Facility PLW III [Member] Secured Warehouse Facility PLW III Basic (in shares) Basic weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Asset-backed notes, unpaid principal balance Secured Debt Collateral balance Debt Instrument, Collateral Amount Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Number of reportable segments Number of Reportable Segments Year four Lessee, Operating Lease, Liability, to be Paid, Year Four Member relationships Customer Relationships [Member] Entity Address, City or Town Entity Address, City or Town Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Capitalized software and other intangibles, net Total intangible assets, net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Level 2 Fair Value, Inputs, Level 2 [Member] Accumulated amortization Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Facility Amount Total commitment Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Year three Lessor, Operating Lease, Payment to be Received, Year Three New Corporate Financing Facility New Corporate Financing Facility [Member] New Corporate Financing Facility Capitalized compensation expense Share-Based Payment Arrangement, Amount Capitalized Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Information Technology and Communication Services Information Technology and Communication Services [Member] Information Technology and Communication Services Recently Adopted Accounting Standards and Accounting Standards to be Adopted New Accounting Pronouncements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Corporate financing Corporate Financing Debt Corporate Financing Debt Balance Long-Term Debt Warrants issued, exercise price (in USD per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Asset-backed borrowings at amortized cost (Note 8) Asset-backed Borrowings, Fair Value Disclosure Asset-backed Borrowings, Fair Value 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Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Amount due to whole loan buyer Servicing Liability at Amortized Cost, Balance Corporate financing Corporate Financing Facility [Member] Corporate Financing Facility Purchase commitment, 2027 Purchase Obligation, to be Paid, Year One Total liabilities Liabilities Trading Symbol Trading Symbol Interest expense Interest Expense, Borrowings Discount rate Measurement Input, Discount Rate [Member] Schedule of Other Liabilities Other Liabilities [Table Text Block] Schedule of Interest Income Interest Income and Interest Expense Disclosure [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] System development costs Software, In-Development [Member] Company Selected Measure Name Company Selected Measure Name Total Finite-Lived Intangible Asset, Expected Amortization Finite-Lived Intangible Asset, Expected Amortization Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Weighted average effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Earnings per share: Earnings per share: Earnings Per Share, Diluted [Abstract] Term Loan Medium-Term Note [Member] Purchase commitment Long-Term Purchase Commitment, Amount Outstanding principal balance Long-Term Debt, Gross Derivative asset Derivative Asset, Net Of Amendment Adjustment Derivative Asset, Net Of Amendment Adjustment Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Asset Class [Domain] Asset Class [Domain] Related Party Transactions [Abstract] Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Warrants Warrant [Member] Diluted (in shares) Diluted weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Oportun Issuance Trust 2024-2 Asset-backed Notes Series 2024-2 [Member] Asset-backed Notes Series 2024-2 Repayments of corporate financing Repayments Of Corporate Financing Debt Repayments Of Corporate Financing Debt Fees on 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Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Loans receivable at fair value Loans and Leases Receivable, Gross, at Fair Value Loans and Leases Receivable, Gross, at Fair Value Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Prepaid expenses Prepaid Expense Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Schedule of Reconciliation of Loans Receivable at Fair Value Using Significant Unobservable Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Other Other Intangible Assets [Member] Changes in operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Income tax expense (benefit) recognized for share-based compensation exercises Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Revenue Interest and Dividend Income, Operating [Abstract] Interest on member accounts Interest On Members Accounts Interest On Members Accounts Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Other Other Assets, Miscellaneous Effective tax rate Effective Income Tax Rate Reconciliation, Percent Whole Loan Sale Program Whole Loan Sale Program [Member] Whole Loan Sale Program Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Intangible Asset, Indefinite-Lived, Class [Domain] Intangible Asset, Indefinite-Lived, Class [Domain] Total lease payments Lessee, Operating Lease, Liability, to be Paid Change in income tax (as a percent) Effective Income Tax Rate Reconciliation, Percent, Increase (Decrease) From Prior Year Period Effective Income Tax Rate Reconciliation, Percent, Increase (Decrease) From Prior Year Period Gain on loan sales and other Gain (Loss) on Sale of Financing Receivable Transfers and Servicing [Abstract] Transfers and Servicing [Abstract] Schedule of Fair Value of Loans Receivable and Asset-Backed Notes Fair Value Option, Disclosures [Table Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Weighted average effect of dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Collateral [Domain] Collateral Held [Domain] Interest income Interest Expense, Borrowings, Net Of Adjustment For Change In Estimate Interest Expense, Borrowings, Net Of Adjustment For Change In Estimate All Executive Categories All Executive Categories [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayments of secured financing Repayments of Long-Term Lines of Credit Depreciation Depreciation Other Liabilities Other Liabilities Disclosure [Text Block] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Right of use assets - operating Operating Lease, Right-of-Use Asset Equity Compensation and Other Benefits Shareholders' Equity and Share-Based Payments [Text Block] Principal and interest payments from members Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Accounts payable Accounts Payable, Fair Value Disclosure Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Restricted cash Restricted Cash, Fair Value Disclosure Fair value portion of cash and cash equivalents which is restricted for use as minimum collateral for securitization facilities. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Reporting Segment Reporting [Text Block] Secured financing Long-Term Line of Credit Minimum Minimum [Member] Sublease income Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Abstract] Servicing Assets at Fair Value Servicing Assets at Fair Value [Line Items] Expiration Date Trading Arrangement Expiration Date Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Liabilities Liabilities [Abstract] Asset-Backed Notes, At Fair Value Asset-Backed Notes, At Fair Value [Member] Asset-Backed Notes, At Fair Value Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Restricted cash Restricted cash Restricted cash Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Principal disbursements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Other liabilities Total other liabilities Other Liabilities Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Remaining cumulative charge-offs Measurement Input, Default Rate [Member] Non-interest income Total non-interest income Noninterest Income, Other Operating Income Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Exercise Price Award Exercise Price Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Vesting of restricted stock units, net of shares withheld Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Remaining lease term (less than) Lessee, Operating Lease, Remaining Lease Term Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Year one Lessor, Operating Lease, Payment to be Received, Year One Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Secured financing Secured financing Warehouse Agreement Borrowings Borrowings Debt Disclosure [Text Block] Repayments of loan principal Proceeds from Collection of Finance Receivables Accrued interest Interest Payable Purchase commitment, percentage Long-Term Purchase Commitment, Percentage Long-Term Purchase Commitment, Percentage Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Repayments of asset-backed borrowings at amortized cost Repayments Of Asset-backed Notes At Amortized Cost Repayments Of Asset-backed Notes At Amortized Cost PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Net increase (decrease) in fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Asset-Backed Notes Secured Debt [Member] Loans receivable at fair value Loans Receivable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Interest income Total interest income Interest and Fee Income, Loans, Consumer Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Oportun Issuance Trust 2025-D Asset-Backed Notes Series 2025-D [Member] Asset-Backed Notes Series 2025-D Total leases Operating Lease, Liability Outsourcing and professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Net payments related to stock-based activities Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Program Management Agreement, automatic renewal period Program Management Agreement, Automatic Renewal Period Program Management Agreement, Automatic Renewal Period Loans Receivable at Fair Value Loans Receivable [Member] General, administrative and other Selling, General and Administrative Expense Leases, Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financing receivable, transfers Financing Receivable, Transfers Financing Receivable, Transfers Total anti-dilutive common share equivalents (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Schedule of Antidilutive Securities Excluded from Calculation of Diluted Weighted-Average Common Shares Outstanding Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Weighted Average Weighted Average [Member] Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Common stock, additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Warehouse Agreement Borrowings Warehouse Agreement Borrowings [Member] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net decrease in fair value Fair value adjustment, net Debt Securities, Realized Gain (Loss) Income Statement [Abstract] Income Statement [Abstract] Stockholders' equity Equity, Attributable to Parent [Abstract] Oportun Issuance Trust 2026-A Asset-Backed Notes Series 2026-A [Member] Asset-Backed Notes Series 2026-A Acquired developed technology Software, Purchased [Member] Document Transition Report Document Transition Report Purchase commitment, beyond 2029 Purchase Obligation, to be Paid, After Year Two Purchase Obligation, to be Paid, After Year Two Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Deferred tax assets, net Deferred Income Tax Assets, Net Operating expenses: Operating Expenses [Abstract] Capitalized costs Intangible Asset, Finite-Lived, Capitalized Cost Intangible Asset, Finite-Lived, Capitalized Cost Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Capitalized Software and Intangible Assets Intangible Asset, Finite-Lived [Table Text Block] Intangible Asset, Finite-Lived, Acquired [Table] Intangible Asset, Finite-Lived, Acquired [Table] City Area Code City Area Code Originations of loans sold and held for sale Loans sold and held for sale Payment for Origination and Purchase, Loan, Held-for-Sale All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Unrecognized compensation cost, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Capitalized Software and Other Intangibles Intangible Asset [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Lease expense Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Entity [Domain] Entity [Domain] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Imputed interest Lessor, Operating Lease, Asset, Undiscounted Excess Amount Lessor, Operating Lease, Asset, Undiscounted Excess Amount Oportun Issuance Trust 2024-1 Asset-backed Notes Series 2024-1 [Member] Asset-backed Notes Series 2024-1 Schedule of Stock-Based Compensation Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Oportun Issuance Trust 2025-C Asset-backed Notes Series 2025-C [Member] Asset-backed Notes Series 2025-C Bank Partnership Program And Servicing Agreement Loans Bank Partnership Program And Servicing Agreement Loans [Member] Bank Partnership Program And Servicing Agreement Loans Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-Term Purchase Commitment, Category of Item Purchased [Domain] PEO PEO [Member] Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Total stock-based 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[Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Unobservable inputs for unsecured personal loan portfolio Loans Held as Assets, Measurement Input Value of input used to measure loans held as assets. Schedule of Carry Value and Estimated Fair Values of Financial Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Diluted (in USD per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Change in income tax expense, increase (decrease) Income Tax Expense (Benefit), Increase (Decrease) From Prior Year Period Income Tax Expense (Benefit), Increase (Decrease) From Prior Year Period Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Amortization of intangible assets Intangible Asset, Finite-Lived, Amortization Expense Borrowings under secured financing Proceeds from Long-Term Lines of Credit Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Current Collateral Current Collateral [Member] Current Collateral as of the reporting period end for asset-backed notes. Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Subscription revenue Revenue from Contract with Customer, Excluding Assessed Tax Total fixed assets, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Financial Instruments [Domain] Financial Instruments [Domain] Ownership percentage in stocks (greater than) Stocks, Ownership Percentage Stocks, Ownership Percentage Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Derivative asset Derivative Asset Oportun PLW IV Trust Secured Warehouse Facility PLW IV [Member] Secured Warehouse Facility PLW IV Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Issuance of common stock upon exercise of stock options, net of shares withheld Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Estimated fair value Estimate of Fair Value Measurement [Member] Revenue Revenue from Contract with Customer [Text Block] Other, net Payment for (Proceeds from) Other Investing Activity Other Assets Capitalized Cost, Software to be Sold, Leased, or Marketed, after Accumulated Amortization [Abstract] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Number of tranches Debt Instrument, Number Of Tranche Debt Instrument, Number Of Tranche Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Underpayment of VAT of Mexican subsidiary Underpayment of VAT of Mexican Subsidiary [Member] Underpayment of VAT of Mexican Subsidiary Proceeds from issuance of debt Proceeds from Issuance of Debt Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Oportun Issuance Trust (Series 2021-C) Asset-Backed Notes Series 2021-C [Member] Asset-Backed Notes Series 2021-C Collateral [Axis] Collateral Held [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Total sublease income Operating Lease, Asset Operating Lease, Asset Thereafter Intangible Asset, Finite-Lived, Estimated Amortization Expense, after Year Five Asset-backed notes at fair value Current balance Asset-backed notes, fair value Secured Debt, Fair Value Fair value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by asset of the borrower. 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Liabilities and stockholders' equity Liabilities and Stockholders' Equity, Average Amount Outstanding [Abstract] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Oportun Financial Corporation Oportun Financial Corporation [Member] Oportun Financial Corporation Capitalized software, gross Intangible 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or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Loan origination commitment, maximum amount Loan Origination Commitment, Maximum Amount Loan Origination Commitment, Maximum Amount Legal Entity [Axis] Legal Entity [Axis] Interest Rate, basis for effective rate (as a percent) Debt Instrument, Interest Rate, Basis for Effective Rate, Percentage Debt Instrument, Interest Rate, Basis for Effective Rate, Percentage Income tax benefit related to stock based compensation expense Share-Based Payment Arrangement, Expense, Tax Benefit Non-interest income Noninterest Income [Abstract] Cash and cash equivalents and restricted cash, beginning of period Cash and cash equivalents and restricted cash, end of period Total cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity 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Stock Issued During Period, Shares, Conversion of Convertible Securities Secured borrowings Secured Borrowing Agreement [Member] Secured Borrowing Agreement Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in USD per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type [Axis] Award Type [Axis] 2026 (remaining six months) Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Payments of deferred financing costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Personal Loans Personal Loans [Member] Personal Loans Accumulated deficit Retained Earnings (Accumulated Deficit) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Loan origination commitment, next twelve months, maximum amount Loan Origination Commitment, Next Twelve Months, Maximum Amount Loan Origination Commitment, Next Twelve Months, Maximum Amount Current tax liabilities Current Tax Liabilities Net Current Tax Liabilities Net Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Additional Paid-in Capital, Warrants APIC - Warrants [Member] APIC - Warrants Equity Awards Adjustments Equity Awards Adjustments [Member] Purchase commitment, remainder of 2026 Purchase Obligation, to be Paid, Remainder of Fiscal Year Total liabilities and stockholders' equity Liabilities and Equity Sales and marketing Business Development Remaining cumulative prepayments Measurement Input, Prepayment Rate [Member] Stock options Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Servicing Assets at Fair Value [Table] Servicing Asset at Fair Value, Activity [Table] Schedule of Sublease Income Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Technology and facilities Communications, Information Technology and Occupancy Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Related Party, Type [Domain] Related and Nonrelated Parties [Domain] After year three Lessor, Operating Lease, Payment to be Received, after Year Three Lessor, Operating Lease, Payment to be Received, after Year Three Tabular List, Table Tabular List [Table Text Block] 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2026 (remaining six months) Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Fixed assets Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Issuance of common stock upon exercise of warrants Stock Issued During Period, Value, Conversion of Convertible Securities Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Borrowings under 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[Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other, net Other Noncash Income (Expense) Year five Lessee, Operating Lease, Liability, to be Paid, Year Five Debt Instrument [Line Items] Debt Instrument [Line Items] Initial Collateral Initial Collateral [Member] Initial Collateral balance on the issuance date of asset backed-notes. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Entity Filer Category Entity Filer Category Non-cash investments in capitalized assets Non-Cash Investment In Capitalized Assets Non-Cash Investment In Capitalized Assets Intangible Asset, Indefinite-Lived, Class [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Originations and purchases of loans held for investment Payment for Acquisition, Loan, Held-for-Investment Year five Lessor, Operating Lease, Payment to be Received, Year Five Name Trading Arrangement, Individual Name Intangible Assets, Excluding Internal-Use Software Intangible Assets, Excluding Internal-Use Software [Member] Intangible Assets, Excluding Internal-Use Software Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Average life (years) Measurement Input, Expected Term [Member] Rental expenses under operating leases Operating Lease, Expense Capitalization of system development costs Payments for Software Company Selected Measure Amount Company Selected Measure Amount Current tax assets Income Taxes Receivable Schedule of Non-Interest Income Interest and Other Income [Table Text Block] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Corporate financing (Note 8) Acquisition And Corporate Financing Debt, Fair Value Disclosure Acquisition And Corporate Financing Debt, Fair Value Disclosure Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Purchase commitment, maximum number of days delinquent Long-Term Purchase Commitment, Loans To Be Purchased, Maximum Number Of Days Delinquent Long-Term Purchase Commitment, Loans To Be Purchased, Maximum Number Of Days Delinquent Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Proceeds from sale of loans Proceeds from Sale, Loan, Other, Held-for-Sale Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Net increase in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Loans Held for Sale and Loans Sold Transfers and Servicing of Financial Assets [Text Block] Year two Lessor, Operating Lease, Payment to be Received, Year Two Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Oportun Financial Corporation - Refinance Oportun Financial Corporation - Refinance [Member] Oportun Financial Corporation - Refinance Restatement Determination Date: Restatement Determination Date [Axis] Warrants issued (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Additional Paid-in Capital, Common Stock APIC - Common Stock [Member] Excess of issue price over par or stated value of the entity's common stock. Other Asset Backed Borrowings Other Asset Backed Borrowings [Member] Other Asset Backed Borrowings Schedule of Other Assets Schedule of Other Assets [Table Text Block] Asset-Backed Notes, At Amortized Cost Asset-Backed Notes, At Amortized Cost [Member] Asset-Backed Notes, At Amortized Cost Category of Item Purchased [Axis] Category of Item Purchased [Axis] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]