Document And Entity Information - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Mar. 10, 2025 |
Jun. 30, 2024 |
|
| Document Information [Line Items] | |||
| Entity Central Index Key | 0001693577 | ||
| Entity Registrant Name | MainStreet Bancshares, Inc. | ||
| Amendment Flag | true | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Fiscal Period Focus | FY | ||
| Document Fiscal Year Focus | 2024 | ||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2024 | ||
| Document Transition Report | false | ||
| Entity File Number | 001-38817 | ||
| Entity Incorporation, State or Country Code | VA | ||
| Entity Tax Identification Number | 81-2871064 | ||
| Entity Address, Address Line One | 10089 Fairfax Boulevard | ||
| Entity Address, City or Town | Fairfax | ||
| Entity Address, State or Province | VA | ||
| Entity Address, Postal Zip Code | 22030 | ||
| City Area Code | 703 | ||
| Local Phone Number | 481-4567 | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Document Financial Statement Error Correction [Flag] | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 134,721,919 | ||
| Entity Common Stock, Shares Outstanding | 7,728,106 | ||
| Amendment Description | EXPLANATORY NOTE MainStreet Bancshares, Inc. ("we" or the "Company") is filing this Amendment No. 3 on Form 10-K/A (the “Amendment”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as filed with the United States Securities and Exchange Commission on March 14, 2025 (the “Original Report"). Although referenced in the opinion of the Company’s independent auditors with respect to the financial statements, the full text of the opinion of the Company’s independent auditor with respect to its internal control over financial reporting was inadvertently omitted from the Original Report. Additionally, Item 9A of the Original Report is amended to disclose the opinion of the Company’s independent auditor with respect to its internal control over financial reporting. Pursuant to Rule 12b-15 promulgated under the Securities and Exchange Act of 1934, as amended, we have included the entire text of Part II, Item 8 and Item 9A in this Form 10-K/A. Part IV, Item 15 includes the consent of Yount, Hyde & Barbour, P.C. and updated certifications of the Company’s Chief Executive Officer and Chief Financial Officer. Except as expressly set forth herein, this Amendment does not reflect events occurring after the date of the Original Report or modify or update any of the other disclosures contained therein in any way other than as required to reflect the amendments referred to above. Accordingly, this Amendment should be read in conjunction with the Original Report and the Company's other filings with the SEC. | ||
| Auditor Firm ID | 613 | ||
| Auditor Name | Yount, Hyde & Barbour, P.C. | ||
| Auditor Location | Winchester, Virginia, USA | ||
| Depositary Shares [Member] | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Depositary Shares (each representing a 1/40th interest in a share of 7.50% Series A Fixed-Rate Non-Cumulative Perpetual Preferred Stock) | ||
| Trading Symbol | MNSBP | ||
| Security Exchange Name | NASDAQ | ||
| Common Stock [Member] | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Common Stock | ||
| Trading Symbol | MNSB | ||
| Security Exchange Name | NASDAQ |