XML 55 R45.htm IDEA: XBRL DOCUMENT
v3.23.3

Fair Value Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Carrying (Reported) Amount, Fair Value Disclosure [Member] |  |
Fair Value, Financial Assets: [Abstract] |  |
Fair Value, Financial Instruments, Loans, Net | $ 538,832 | $ 498,693
Fair Value, Financial Liabilities: [Abstract] |  |
Fair Value, Financial Instruments, Time Deposits | 193,575 | 150,375
Estimate of Fair Value, Fair Value Disclosure [Member] |  |
Fair Value, Financial Assets: [Abstract] |  |
Fair Value, Financial Instruments, Loans, Net | 501,725 | 484,007
Fair Value, Financial Liabilities: [Abstract] |  |
Fair Value, Financial Instruments, Time Deposits | 189,310 | 150,146
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Financial Assets: [Abstract] |  |
Fair Value, Financial Instruments, Loans, Net | 0 | 0
Fair Value, Financial Liabilities: [Abstract] |  |
Fair Value, Financial Instruments, Time Deposits | 0 | 0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Financial Assets: [Abstract] |  |
Fair Value, Financial Instruments, Loans, Net | 0 | 0
Fair Value, Financial Liabilities: [Abstract] |  |
Fair Value, Financial Instruments, Time Deposits | 189,310 | 150,146
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Financial Assets: [Abstract] |  |
Fair Value, Financial Instruments, Loans, Net | 501,725 | 484,007
Fair Value, Financial Liabilities: [Abstract] |  |
Fair Value, Financial Instruments, Time Deposits | $ 0 | $ 0

X
- References No definition available. + Details
Name: | aubn_FairValueFinancialAssetsAbstract
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | aubn_FairValueFinancialInstrumentsLoansNet
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | aubn_FairValueFinancialInstrumentsTimeDeposits
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | aubn_FairValueFinancialLiabilitiesAbstract
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |