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v3.22.1

Variable Interest Entities (Details) $ in Thousands | Mar. 31, 2022 USD ($)
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Maxium Loss Exposure [Member] |
Variable Interest Entities [Line Items] |
New Markets Tax Credit Investment | $ 2,158
Asset Recognized [Member] |
Variable Interest Entities [Line Items] |
New Markets Tax Credit Investment | $ 2,158

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

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | aubn_VariableInterestEntitiesAxisAxis=aubn_MaxiumLossExposureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aubn_VariableInterestEntitiesAxisAxis=aubn_AssetRecognizedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |