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Document and Entity Information
Jul. 14, 2025
Cover [Abstract]  
Entity Registrant Name Oportun Financial Corp
Amendment Flag false
Entity Central Index Key 0001538716
Document Type 8-K
Document Period End Date Jul. 14, 2025
Entity File Number 001-39050
Entity Incorporation State 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
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.0001 par value per share
Trading Symbol OPRT
Security Exchange Name NASDAQ
Entity Emerging Growth Company false