| Cover Page | Dec. 06, 2023 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 06, 2023 |
| Entity Registrant Name | OppFi Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39550 |
| Entity Tax Identification Number | 85-1648122 |
| Entity Address, Address Line One | 130 E. Randolph Street |
| Entity Address, Address Line Two | Suite 3400 |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60601 |
| City Area Code | 312 |
| Local Phone Number | 212-8079 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001818502 |
| Amendment Flag | false |
| Common Class A | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A common stock, $0.0001 parvalue per share |
| Trading Symbol | OPFI |
| Security Exchange Name | NYSE |
| Warrant | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one share of Class A common stock, each at an exercise price of $11.50 per share |
| Trading Symbol | OPFI WS |
| Security Exchange Name | NYSE |
