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Variable Interest Entities (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Maxium Loss Exposure [Member]
Variable Interest Entities [Line Items]
New Markets Tax Credit Investment	$ 2,006
Asset Recognized [Member]
Variable Interest Entities [Line Items]
New Markets Tax Credit Investment	$ 2,006

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

X

- 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: