v3.25.2
Document And Entity Information
Jul. 28, 2025
Document Information [Line Items]  
Entity Address, Postal Zip Code 70801
Entity Tax Identification Number 20-5340628
Entity File Number 001-38447
Entity Central Index Key 0001624322
Entity Incorporation, State or Country Code LA
Entity Registrant Name BUSINESS FIRST BANCSHARES, INC.
Document Type 8-K
Document Period End Date Jul. 28, 2025
Entity Address, Address Line One 500 Laurel Street, Suite 101
Entity Address, City or Town Baton Rouge
Entity Address, State or Province LA
City Area Code 225
Local Phone Number 248-7600
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $1.00 per share
Trading Symbol BFST
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false