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v3.22.0.1

Variable Interest Entity (Details) $ in Thousands | Dec. 31, 2021 USD ($)
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MaxiumLossExposureMember [Member] |
us-gaap_Variable Interest Entity [Line Items] |
New Markets Tax Credit investment | $ 2,176
Asset Recognized Member [Member] |
us-gaap_Variable Interest Entity [Line Items] |
New Markets Tax Credit investment | $ 2,176

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

X
- 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_VariableInterestEntitiesAxis=aubn_MaxiumlossexposurememberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aubn_VariableInterestEntitiesAxis=aubn_AssetRecognizedMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |