XML 13 R1.htm IDEA: XBRL DOCUMENT v3.25.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2025
May 01, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   37,501,165
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001538716  
Amendment Flag false