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Each time-based restricted stock unit is economically equivalent to one share of common stock of the issuer."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Reflects the grant of 3,756 time-based restricted stock units granted to the Reporting Person on March 1, 2025, of which 1,239 shares will vest on March 1, 2026, 1,239 shares will vest on March 1, 2027, and the remaining 1,278 shares will vest on March 1, 2028. Each time-based restricted stock unit is economically equivalent to one share of common stock of the issuer."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"The reporting person has irrevocably elected to defer the reported securities under the b1BANK Deferred Compensation Plan (the \"Deferred Compensation Plan\"). In accordance with the Deferred Compensation Plan, the reporting person will receive a lump sum cash distribution in an amount equal to the vested securities deferred under the Deferred Compensation Plan, plus any earnings or losses attributable thereto in accordance with the Deferred Compensation Plan, on the first business day of the month following the month in which the reporting person's separation of service, death or disability occurs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes: (a) 3,574 time-based restricted stock units granted on December 12, 2024, of which 1,179 shares will vest on December 12, 2025, 1,179 shares will vest on December 12, 2026, and the remaining 1,216 shares will vest on December 12, 2027; and (b) 3,756 time-based restricted stock units granted to the Reporting Person on March 1, 2025, of which 1,239 shares will vest on March 1, 2026, 1,239 shares will vest on March 1, 2027, and the remaining 1,278 shares will vest on March 1, 2028."}],"balance_after":7330,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3756},"source":{"system":"sec-edgar","filing":"0001437749-25-006210","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774925006210/rdgdoc.xml","form_type":"4"}},{"id":1330470,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2024-12-16T21:09:28.000Z","date":"2024-12-12","kind":"grant","planned":false,"acquired":true,"shares":3574,"price":28.5,"value":101859.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the grant of time-based restricted stock to the reporting person. The time-based restricted stock will vest in substantially equal installments on the first, second, and third anniversary of the issuance date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 3,282 shares of unvested restricted stock granted on 2/1/2023 which will vest on 3/31/2025; (b) 4,869 shares of unvested restricted stock granted on 2/1/2024, of which 2,399 shares will vest on 3/31/2025, and the remaining 2,470 shares will vest on 3/31/2026; and (c) 3,574 shares of unvested restricted stock granted on 12/12/2024, of which 1,179 shares will vest on 12/12/2025, 1,179 shares will vest on 12/12/2026, and the remaining 1,216 shares will vest on 12/12/2027. Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."}],"balance_after":21466,"source":{"system":"sec-edgar","filing":"0001437749-24-037592","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774924037592/rdgdoc.xml","form_type":"4"}},{"id":1552680,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2024-04-02T20:29:53.000Z","date":"2024-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":1719,"price":22.28,"value":38299.32,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (a) 3,282 shares of unvested restricted stock granted on 2/1/2023 which will vest on 3/31/2025, and (b) 4,869 shares of unvested restricted stock granted on 2/1/2024, of which 2,399 shares will vest on 3/31/2025, and the remaining 2,470 shares will vest on 3/31/2026.  Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."}],"balance_after":17892,"source":{"system":"sec-edgar","filing":"0001437749-24-010619","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774924010619/rdgdoc.xml","form_type":"4"}},{"id":1660714,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2024-02-02T22:11:38.000Z","date":"2024-02-01","kind":"grant","planned":false,"acquired":true,"shares":7268,"price":22.48,"value":163384.64,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (a) 380 shares of unvested restricted stock granted on 2/1/2022, which will vest on 3/31/2024, (b) 6,467 shares of unvested restricted stock granted on 2/1/2023, of which 3,185 shares will vest on 3/31/2024 and the remaining 3,282 shares will vest on 3/31/2025, and (c) 7,268 shares of unvested restricted stock granted on 2/1/2024, of which 2,399 shares will vest on 3/31/2024, 2,399 shares will vest on 3/31/2025, and the remaining 2,470 shares will vest on 3/31/2026.  Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."}],"balance_after":19611,"source":{"system":"sec-edgar","filing":"0001437749-24-002988","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774924002988/rdgdoc.xml","form_type":"4"}},{"id":1888346,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2023-05-18T00:28:26.000Z","date":"2023-05-16","kind":"purchase","planned":false,"acquired":true,"shares":1400,"price":14.34,"value":20076.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (a) 380 shares of unvested restricted stock granted on 2/1/2022, which will vest on 3/31/2024, and (b) 6,467 shares of unvested restricted stock granted on 2/1/2023, of which 3,185 shares will vest on 3/31/2024 and the remaining 3,282 shares will vest on 3/31/2025.  Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."}],"balance_after":12343,"source":{"system":"sec-edgar","filing":"0001437749-23-014998","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774923014998/rdgdoc.xml","form_type":"4"}},{"id":1926711,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2023-04-04T20:20:02.000Z","date":"2023-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":1141,"price":17.13,"value":19545.33,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (a) 380 shares of unvested restricted stock granted on 2/1/2022, which will vest on 3/31/2024, and (b) 6,467 shares of unvested restricted stock granted on 2/1/2023, of which 3,185 shares will vest on 3/31/2024 and the remaining 3,282 shares will vest on 3/31/2025.  Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."}],"balance_after":10943,"source":{"system":"sec-edgar","filing":"0001437749-23-009303","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774923009303/rdgdoc.xml","form_type":"4"}},{"id":2032062,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54191,"kind":"person","name":"Manning Kathryn","position":1,"cik":"0001927057","reported_name":"Manning Kathryn","relationship":{"officer":true,"officer_title":"Chief Risk Officer"}}],"security":"COMMON STOCK","published_at":"2023-02-04T01:51:41.000Z","date":"2023-02-01","kind":"grant","acquired":true,"shares":9652,"price":20.74,"value":200182.48,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the grant of restricted stock to reporting person. The terms of the restricted stock grant are described in footnote 2 below."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 237 shares of unvested restricted stock granted on 2/1/2021, which will vest on 3/31/2023, (b) 760 shares of unvested restricted stock granted on 2/1/2022, of which 380 shares will vest on 3/31/2023, and the remaining 380 shares will vest on 3/31/2024, and (c) 9,652 shares of unvested restricted stock granted on 2/1/2023, of which 3,185 shares will vest on 3/31/2023, 3,185 shares will vest on 3/31/2024, and the remaining 3,282 shares will vest on 3/31/2025.  Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 997 shares that were inadvertently omitted from the reporting person's Form 3 filed on May 9, 2022."}],"balance_after":12084,"source":{"system":"sec-edgar","filing":"0001437749-23-002524","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774923002524/rdgdoc.xml","form_type":"4"}}]}