Document and Entity Information |
Jul. 01, 2025 |
|---|---|
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Jul. 01, 2025 |
| Entity Registrant Name | AUBURN NATIONAL BANCORPORATION, INC |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 0-26486 |
| Entity Tax Identification Number | 63-0885779 |
| Entity Address Address Line 1 | 100 North Gay Street |
| Entity Address Address Line 2 | P.O. Drawer 3110 |
| Entity Address City Or Town | Auburn |
| Entity Address State Or Province | AL |
| Entity Address Postal Zip Code | 36831-3110 |
| City Area Code | 334 |
| Local Phone Number | 821-9200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 |
| Trading Symbol | AUBN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Description | This Form 8-K/A amends the Form 8-K filed by Auburn National Bancorporation, Inc. (“the Company”) on July 2, 2025 (Item 5.03) with respect to a Certificate of Amendment (the “Certificate of Amendment”) amending and restating Section 7.04 to the Company’s Certificate of Incorporation (the “Amendment”) considered at the Company’s Annual Meeting held May 13, 2025 (the “Annual Meeting”).The following restates in full Item 5.03 from the July 2, 2025 Form 8-K and Item 9.01 includes the Certificate of Correction with respect to the Amendment and the Previously filed Certificate of Amendment. |
| Current Fiscal Year End Date | --12-31 |
| Entity Central Index Key | 0000750574 |