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v3.23.1

Subsequent Events Textuals (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2023 USD ($)
Subsequent Event [Abstract] |
Collateral Dependent Loan Recorded Investment Paid In Full | $ 1.3
Collateral Dependent Loan Recorded Investment Paid In Full Related Allowance | $ 0.5

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

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

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