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The time-based restricted stock units will vest in three substantially equal installments on the first, second, and third anniversary of the issuance date. Each time-based restricted stock unit is economically equivalent to one share of common stock of the issuer."},{"field":"shares","element":"transactionShares","label":"F5","text":"The reporting person has irrevocably elected to defer the reported securities under the b1BANK Deferred Compensation Plan (the \"Deferred Compensation Plan\"). 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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":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The reporting person has irrevocably elected to defer the reported securities under the b1BANK Deferred Compensation Plan (the \"Deferred Compensation Plan\"). 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The terms of the restricted stock grant are described in footnote 2 below."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a)\t1,871 shares of unvested restricted stock granted on 2/1/2020, which will vest on 3/31/2022, (b) 7,355 shares of unvested restricted stock granted on 2/1/2021, 3,623 shares of which will vest on 3/31/2022 and the remaining 3,732 shares will vest on 3/31/2023, and (c) 9,344 shares of unvested restricted stock granted on 2/1/2022, of which 3,084 shares will vest on 3/31/2022, 3,084 shares will vest on 3/31/2023, and the remaining 3,176 shares will vest on 3/31/2024. 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 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 9,412 shares."}],"balance_after":44332,"source":{"system":"sec-edgar","filing":"0001437749-22-002366","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774922002366/rdgdoc.xml","form_type":"4"}},{"id":2601833,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CBO of b1Bank"}}],"security":"Common Stock","published_at":"2021-08-16T23:25:24.000Z","date":"2021-03-31","kind":"tax_withholding","acquired":false,"shares":2085,"price":23.93,"value":49894.05,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (a) 1,871 shares of unvested restricted stock granted on 2/1/2020, which will vest on 3/31/2022, and (b) 7,355 shares of unvested restricted stock granted on 2/1/2021, 3,623 shares of which will vest on 3/31/2022 and the remaining 3,732 shares will vest on 3/31/2023. 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":"F2","text":"Includes 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 8,869 shares."}],"balance_after":34445,"source":{"system":"sec-edgar","filing":"0001437749-21-020233","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774921020233/rdgdoc.xml","form_type":"4"}},{"id":2805176,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CBO of b1Bank"}}],"security":"COMMON STOCK","published_at":"2021-03-05T19:44:22.000Z","date":"2021-02-01","kind":"grant","acquired":true,"shares":10978,"price":20.7,"value":227244.6,"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) 1,425 shares of unvested restricted stock granted on 03/31/2019, all of which will vest on 3/31/2021, (b) 3,687 shares of unvested restricted stock granted on 2/1/2020, which will vest in two equal installments on 3/31/2021 and 3/31/2022, and (c) 10,978 shares of unvested restricted stock granted on 2/1/2021, 3,623 shares of which will vest on each of 3/31/2021 and 3/31/2022 and the remaining 3,733 shares will vest on 3/31/2023.  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 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 8,213 shares."}],"balance_after":35974,"source":{"system":"sec-edgar","filing":"0001437749-21-005126","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774921005126/rdgdoc.xml","form_type":"4/A","original_submission_date":"2021-02-03"}},{"id":2880713,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CBO of b1Bank"}}],"security":"COMMON STOCK","published_at":"2021-02-04T02:35:45.000Z","date":"2020-02-01","kind":"grant","acquired":true,"shares":10978,"price":20.7,"value":227244.6,"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) 1,425 shares of unvested restricted stock granted on 03/31/2019, all of which will vest on 3/31/2021, (b) 3,687 shares of unvested restricted stock granted on 2/1/2020, which will vest in two equal installments on 3/31/2021 and 3/31/2022, and (c) 10,978 shares of unvested restricted stock granted on 2/1/2021, 3,623 shares of which will vest on each of 3/31/2021 and 3/31/2022 and the remaining 3,733 shares will vest on 3/31/2023.  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 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 8,213 shares."}],"balance_after":35974,"source":{"system":"sec-edgar","filing":"0001437749-21-001926","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774921001926/rdgdoc.xml","form_type":"4"}},{"id":3182316,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CBO of b1Bank"}}],"security":"COMMON STOCK","published_at":"2020-04-03T21:38:53.000Z","date":"2020-03-31","kind":"tax_withholding","acquired":false,"shares":1941,"price":13.5,"value":26203.5,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 1,425 shares of unvested restricted stock granted on 03/31/2019, all of which will vest on 3/31/2021, and (b) 3,687 shares of unvested restricted stock granted on 2/1/2020, which will vest in two equal installments on 3/31/2021 and 3/31/2022.  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 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 6,391 shares."}],"balance_after":22863,"source":{"system":"sec-edgar","filing":"0001437749-20-007163","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774920007163/rdgdoc.xml","form_type":"4"}},{"id":3182315,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CBO of b1Bank"}}],"security":"COMMON STOCK","published_at":"2020-04-03T21:38:53.000Z","date":"2020-02-01","kind":"grant","acquired":true,"shares":5503,"price":24.78,"value":136364.34,"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."}],"balance_after":23746,"source":{"system":"sec-edgar","filing":"0001437749-20-007163","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774920007163/rdgdoc.xml","form_type":"4"}},{"id":3208184,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CCO of Business First Bank"}}],"security":"COMMON STOCK","published_at":"2020-03-16T23:53:19.000Z","date":"2020-03-12","kind":"purchase","acquired":true,"shares":6300,"price":15.84,"value":99792.0,"ownership":{"direct":false,"nature":"By Jordan Family Holdings, LLC"},"balance_after":6300,"source":{"system":"sec-edgar","filing":"0001437749-20-005365","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774920005365/rdgdoc.xml","form_type":"4"}},{"id":3397929,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CCO of Business First Bank"}}],"security":"COMMON STOCK","published_at":"2019-10-03T21:58:26.000Z","date":"2019-03-31","kind":"tax_withholding","acquired":false,"shares":1014,"price":24.54,"value":24883.56,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 1,642 shares of unvested restricted stock granted on 03/31/2018 and (b) 2,808 shares of unvested restricted stock granted on 03/31/2019, in each case subject to vesting in three equal installments over a period of two years beginning on the grant date and subject to the terms of the relevant restricted stock grant. The reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events specified in the restricted stock grant."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 5,541 shares."}],"balance_after":18243,"source":{"system":"sec-edgar","filing":"0001437749-19-019650","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774919019650/rdgdoc.xml","form_type":"4"}},{"id":3397928,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CCO of Business First Bank"}}],"security":"COMMON STOCK","published_at":"2019-10-03T21:58:26.000Z","date":"2019-03-31","kind":"grant","acquired":true,"shares":4190,"price":23.74,"value":99470.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the grant of 4,190 shares of restricted stock to reporting person, 1,382 of which vested upon the grant date. The terms of the restricted stock grant are described in footnote 2 below."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 1,642 shares of unvested restricted stock granted on 03/31/2018 and (b) 2,808 shares of unvested restricted stock granted on 03/31/2019, in each case subject to vesting in three equal installments over a period of two years beginning on the grant date and subject to the terms of the relevant restricted stock grant. The reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events specified in the restricted stock grant."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 5,541 shares."}],"balance_after":19257,"source":{"system":"sec-edgar","filing":"0001437749-19-019650","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774919019650/rdgdoc.xml","form_type":"4"}},{"id":3673511,"issuer":{"id":4961,"kind":"organization","name":"Business First Bancshares, Inc."},"owners":[{"id":54190,"kind":"person","name":"JORDAN PHILIP","position":1,"cik":"0001734775","reported_name":"JORDAN PHILIP","relationship":{"officer":true,"officer_title":"EVP&CCO of Business First Bank"}}],"security":"COMMON STOCK","published_at":"2019-02-05T21:27:13.000Z","date":"2019-02-01","kind":"other","acquired":true,"shares":5583,"price":23.05,"value":128688.15,"ownership":{"direct":true},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"Reflects reallocation of 401(k) assets by reporting person, pursuant to which reporting person acquired units of an employer stock fund available through issuer's 401(k) plan.  Share numbers and price are on an approximately equivalent basis for units held in the fund as if investable cash equivalents held by the fund were fully invested in issuer common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 412 shares of unvested restricted stock granted on 03/31/2017 and (b) 3,235 shares of unvested restricted stock granted on 03/31/2018, in each case subject to vesting in three equal installments over a period of two years beginning on the grant date and subject to the terms of the relevant restricted stock grant. The reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events specified in the restricted stock grant.."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 4,000 shares held by reporting person's IRA and units of employer stock fund through issuer's 401(k) plan equivalent to approximately 5,583 shares."}],"balance_after":15067,"source":{"system":"sec-edgar","filing":"0001437749-19-001881","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1624322/000143774919001881/rdgdoc.xml","form_type":"4"}}]}