| Cover | Jan. 27, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 27, 2022 |
| Entity Registrant Name | BAYFIRST FINANCIAL CORP. |
| Entity Incorporation, State or Country Code | FL |
| Entity File Number | 001-41068 |
| Entity Tax Identification Number | 59-3665079 |
| Entity Address, Address Line One | 700 Central Avenue |
| Entity Address, City or Town | St. Petersburg |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33701 |
| City Area Code | 727 |
| Local Phone Number | 440-6848 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | BAFN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001649739 |
| Amendment Flag | false |
