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Commitment and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Amount of Commitment	$ 60,564	$ 61,889
Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Amount of Commitment	$ 1,921	$ 7,026

X

- Definition

Amount of unused extension of credit for loan commitments and standby letters of Credit

+ References

No definition available.

+ Details

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Namespace Prefix:	aubn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: