v3.25.1
Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Apr. 23, 2025
Jun. 28, 2024
Document Information [Line Items]      
Document Type 10-K/A    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Entity File Number 001-39050    
Entity Registrant Name OPORTUN FINANCIAL CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 45-3361983    
Entity Address, Address Line One 2 Circle Star Way    
Entity Address, City or Town San Carlos,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94070    
City Area Code 650    
Local Phone Number 810-8823    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol OPRT    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 72.1
Entity Common Stock, Shares Outstanding   37,498,727  
Amendment Flag true    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001538716    
Amendment Description Explanatory Note On February 20, 2025, Oportun Financial Corporation filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “Original Form 10-K”). The Original Form 10-K omitted portions of Part III, Items 10 (Directors, Executive Officers and Corporate Governance), 11 (Executive Compensation), 12 (Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters), 13 (Certain Relationships and Related Transactions, and Director Independence), and 14 (Principal Accountant Fees and Services) in reliance on General Instruction G(3) to Form 10-K, which provides that such information may be either incorporated by reference from the registrant’s definitive proxy statement or included in an amendment to Form 10-K, in either case filed with the Securities and Exchange Commission (“SEC”) not later than 120 days after the end of the fiscal year. We no longer expect that the definitive proxy statement for our 2025 annual meeting of stockholders will be filed within 120 days of December 31, 2024. Accordingly, this Amendment No. 1 to Form 10-K (this “Amendment”) is being filed solely to:     •   amend and restate Part III, Items 10, 11, 12, 13, and 14 of the Original Form 10-K to include the information required by such Items;     •   delete the reference on the cover of the Original Form 10-K to the incorporation by reference of portions of our proxy statement into Part III of the Original Form 10-K; and     •   file a new certification of our principal executive officer, principal financial officer and principal accounting officer as an exhibit to this Amendment under Item 15 of Part IV hereof, pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (“Exchange Act”). No financial statements are included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K; accordingly, paragraphs 3, 4 and 5 of the certifications have been omitted. This Amendment does not otherwise change or update any of the disclosures set forth in the Original Form 10-K, including the financial statements, and does not otherwise reflect any events occurring after the filing of the Original Form 10-K. Accordingly, this Amendment should be read in conjunction with the Original Form 10-K and the Company’s filings made with the SEC subsequent to the filing of the Original Form 10-K. Capitalized terms used herein and not otherwise defined are defined as set forth in the Original Form 10-K. As used in this report, the terms “Oportun Financial Corporation,” “Company,” “Oportun,” “we,” “us,” and “our” mean Oportun Financial Corporation and its subsidiaries unless the context indicates otherwise.    
Documents Incorporated by Reference [Text Block] None.