$AUBN
AUBURN NATIONAL BANCORPORATION, INC Stock $aubn

$aubn Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-K Financial Statement

#000119312520064839 Filed on March 06, 2020

Income Statement

Concept	2020 Q1	2019	2018 Q4
Revenue	$7.255M	$30.25M
YoY Change	-5.08%	3938.32%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$460.0K	$662.0K	$230.0K
YoY Change	119.05%	52.18%	-8.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.043M	$4.183M
YoY Change	1.96%	13.79%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$2.191M	$12.11M	$2.990M
YoY Change	-30.86%	9.89%	-3.24%
Income Tax	$390.0K	$2.370M	$590.0K
% Of Pretax Income	17.8%	19.57%	19.73%
Net Earnings	$1.801M	$9.741M	$2.400M
YoY Change	-29.18%	10.27%	31.15%
Net Earnings / Revenue	24.82%	32.2%
Basic Earnings Per Share
Diluted Earnings Per Share	$504.2K	$2.721M	$659.3K
COMMON SHARES
Basic Shares Outstanding	3.593M shares		3.644M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q1	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$14.50M	$15.50M	$13.60M
YoY Change	-2.68%	13.97%	-1.41%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$0.00
YoY Change		-100.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$856.5M	$827.9M	$818.1M
YoY Change	2.57%	1.2%	-4.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$4.800M	$4.300M	$2.500M
YoY Change	71.43%	72.0%	-13.79%
Deferred Revenue
YoY Change
Short-Term Debt	$1.400M	$1.100M	$2.300M
YoY Change	-12.5%	-52.17%	-14.81%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$4.800M	$4.300M	$2.500M
YoY Change	71.43%	72.0%	-13.79%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change			-100.0%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$0.00	$0.00	$0.00
YoY Change			-100.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.800M	$4.300M	$2.500M
Total Long-Term Liabilities	$0.00	$0.00	$0.00
Total Liabilities	$752.9M	$729.6M	$729.0M
YoY Change	1.19%	0.08%	-4.89%
SHAREHOLDERS EQUITY
Retained Earnings			$95.64M
YoY Change			5.91%
Common Stock			$3.818M
YoY Change			0.21%
Preferred Stock
YoY Change
Treasury Stock (at cost)			$6.635M
YoY Change			-0.03%
Treasury Stock Shares			313.3K shares
Shareholders Equity	$103.6M	$98.30M	$89.10M
YoY Change
Total Liabilities & Shareholders Equity	$856.5M	$827.9M	$818.1M
YoY Change	2.57%	1.2%	-4.14%

Cashflow Statement

Concept	2020 Q1	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$1.801M	$9.741M	$2.400M
YoY Change	-29.18%	10.27%	31.15%
Depreciation, Depletion And Amortization	$460.0K	$662.0K	$230.0K
YoY Change	119.05%	52.18%	-8.0%
Cash From Operating Activities	$1.810M	$10.85M	$4.320M
YoY Change	-28.96%	-10.63%	120.41%
INVESTING ACTIVITIES
Capital Expenditures	-$100.0K	-$1.810M	-$70.00K
YoY Change	-93.1%	654.17%	0.0%
Acquisitions
YoY Change
Other Investing Activities	-$21.47M	$25.89M	-$10.76M
YoY Change	-483.39%	-319.22%	-571.93%
Cash From Investing Activities	-$21.58M	$24.09M	-$10.83M
YoY Change	-619.65%	-299.81%	-590.05%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00	$2.721M
YoY Change	-100.0%
Debt Paid & Issued, Net		$0.00
YoY Change		-100.0%
Cash From Financing Activities	$22.03M	-$7.568M	4.420M
YoY Change	87.86%	-81.33%	-81.0%
NET CHANGE
Cash From Operating Activities	$1.810M	$10.85M	4.320M
Cash From Investing Activities	-$21.58M	$24.09M	-10.83M
Cash From Financing Activities	$22.03M	-$7.568M	4.420M
Net Change In Cash	$2.263M	$27.37M	-2.090M
YoY Change	-87.72%	-167.65%	-107.62%
FREE CASH FLOW
Cash From Operating Activities	$1.810M	$10.85M	$4.320M
Capital Expenditures	-$100.0K	-$1.810M	-$70.00K
Free Cash Flow	$1.910M	$12.66M	$4.390M
YoY Change	-52.23%	2.25%	116.26%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	21766000	USD
CY2019	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	22930000	USD
CY2019	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	1218000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	30247000	USD
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4176000	USD
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3957135	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3957135	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	390989	shares
CY2019	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	545000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	36462000	USD
CY2018	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	18000	USD
CY2018	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	46000	USD
CY2019	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	7000	USD
CY2019	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	0	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	435000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	1486000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	866000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	5494000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	655000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	3325000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	1465000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	902000	USD
CY2018	aubn	Fdic And Other Regulatory Assessments FdicAndOtherRegulatoryAssessments	310000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2370000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2187000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	25570000	USD
CY2019	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	26314000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	5730000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15563000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5637000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-250000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1853000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2025000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10850000	USD
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	1807000	USD
CY2018	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-402000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	24085000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12054000	USD
CY2018	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	7731000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-7568000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-40539000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	4092000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	3616000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2295000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2688000	USD
CY2019	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	82000	USD
CY2018	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	1525000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1157000	USD
CY2019	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-32000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3217000	USD
CY2018	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	20000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-40452000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	27367000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	-123000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	311000	USD
CY2019	aubn	Net Loss Gain On Other Real Estate NetLossGainOnOtherRealEstate	59000	USD
CY2018	aubn	Net Loss Gain On Other Real Estate NetLossGainOnOtherRealEstate	0	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	30407000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	27681000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	28892000	USD
CY2018	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	29323000	USD
CY2019	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	437000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	435000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	55078000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	81843000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	8770000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	22673000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	19841000	USD
CY2018	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	240000	USD
CY2019	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	-5430000	USD
CY2019	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	5389000	USD
CY2018	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	-41197000	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-1231000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-358000	USD
CY2018	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1353000	USD
CY2019	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	394000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	872000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	221000	USD
CY2019	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-15771000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	24749000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >NOTE </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;background-color:#FFFF00;' >1</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;' >: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Nature of Business</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Auburn National Bancorporation, Inc. (the “Company”) is a bank holding company </font><font style='font-family:Times New Roman;font-size:10pt;' >whose primary business is conducted by its wholly-owned subsidiary, AuburnBank (the “Bank”). AuburnBank is a commercial bank located in Auburn, Alabama. The Bank provides a full range of banking services in its primary market area, Lee County, which includ</font><font style='font-family:Times New Roman;font-size:10pt;' >es the Auburn-Opelika Metropolitan Statistical Area. </font></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2019	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	120000	USD
CY2019	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	243000	USD
CY2019	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	-123000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	0	USD
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed	0.1156	pure
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1	pure
CY2019	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Coupon Interest Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageCouponInterestRate	0.039	pure
CY2018	us-gaap	Depreciation Depreciation	435000	USD
CY2019	us-gaap	Depreciation Depreciation	662000	USD
CY2019	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	241000	USD
CY2018	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	208000	USD
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P21Y3M0D
CY2018	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P20Y10M0D
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1939000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	584000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2523000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-136000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-17000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1685000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	431000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2116000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	56000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	15000	USD
CY2019	aubn	Deferred Tax Benefit Expense Related To Continuing Operations DeferredTaxBenefitExpenseRelatedToContinuingOperations	153000	USD
CY2019	aubn	Deferred Taxes Stockholders Equity For Change In Accumulated Other Comprehensive Income Loss DeferredTaxesStockholdersEquityForChangeInAccumulatedOtherComprehensiveIncomeLoss	-1952000	USD
CY2018	aubn	Deferred Tax Benefit Expense Related To Continuing Operations DeferredTaxBenefitExpenseRelatedToContinuingOperations	-71000	USD
CY2018	aubn	Deferred Taxes Stockholders Equity For Change In Accumulated Other Comprehensive Income Loss DeferredTaxesStockholdersEquityForChangeInAccumulatedOtherComprehensiveIncomeLoss	1072000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	1559000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	6617000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	12111000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2543000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	508000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	440000	USD
CY2019	aubn	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	92000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-13000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11021000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2315000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	515000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	361000	USD
CY2018	aubn	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	92000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	118000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.041	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.036	pure
CY2019	aubn	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurance	-0.008	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.196	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.047	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033	pure
CY2018	aubn	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurance	-0.008	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.01	pure
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.198	pure
CY2019Q4	us-gaap	Federal Funds Sold FederalFundsSold	25944000	USD
CY2018Q4	us-gaap	Federal Funds Sold FederalFundsSold	26918000	USD
CY2019Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	51327000	USD
CY2018Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	25115000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	235902000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	239801000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	460901000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	476908000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	456515000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	472118000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	14743000	USD
CY2019Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	19202000	USD
CY2018Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	18765000	USD
CY2019Q4	us-gaap	Assets Assets	827879000	USD
CY2018Q4	us-gaap	Assets Assets	818077000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	196218000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	201648000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	527934000	USD
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	522545000	USD
CY2019Q4	us-gaap	Deposits Deposits	724152000	USD
CY2018Q4	us-gaap	Deposits Deposits	724193000	USD
CY2019Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	1069000	USD
CY2018Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	2300000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	729551000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	729022000	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	39000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	39000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3784000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3779000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	101801000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	95635000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2059000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3763000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	9355000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	6635000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	827879000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	818077000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	8500000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	8500000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	313267	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	105528000	USD
CY2019Q4	us-gaap	Land Land	9874000	USD
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	10094000	USD
CY2019Q4	aubn	Furniture Fixtures And Equipment Gross FurnitureFixturesAndEquipmentGross	3109000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	23077000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8334000	USD
CY2018Q4	us-gaap	Land Land	8444000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	9871000	USD
CY2018Q4	aubn	Furniture Fixtures And Equipment Gross FurnitureFixturesAndEquipmentGross	2953000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	21268000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7672000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13596000	USD
CY2019Q4	aubn	Commercial And Industrial Loans CommercialAndIndustrialLoans	56782000	USD
CY2018Q4	aubn	Impaired Financing Receivable Trouble Debt Structuring ImpairedFinancingReceivableTroubleDebtStructuring	157000	USD
CY2018Q4	aubn	Impaired Financing Receivable Troubled Debt Restructuring Allowance For Credit Losses ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses	0	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1299000	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1441000	USD
CY2017Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1644000	USD
CY2018Q4	aubn	Commercial And Industrial Loans CommercialAndIndustrialLoans	63467000	USD
CY2019Q4	aubn	Construction And Land Development Loans ConstructionAndLandDevelopmentLoans	32841000	USD
CY2018Q4	aubn	Construction And Land Development Loans ConstructionAndLandDevelopmentLoans	40222000	USD
CY2019Q4	aubn	Commercial Real Estate Owner Occupied Loans CommercialRealEstateOwnerOccupiedLoans	60893000	USD
CY2018Q4	aubn	Commercial Real Estate Owner Occupied Loans CommercialRealEstateOwnerOccupiedLoans	56413000	USD
CY2019Q4	aubn	Commerical Real Estate Other Loans CommericalRealEstateOtherLoans	164586000	USD
CY2018Q4	aubn	Commerical Real Estate Other Loans CommericalRealEstateOtherLoans	165028000	USD
CY2019Q4	aubn	Consumer Mortgage Loans ConsumerMortgageLoans	48923000	USD
CY2018Q4	aubn	Consumer Mortgage Loans ConsumerMortgageLoans	56223000	USD
CY2019Q4	aubn	Residential Real Estate Investment Property Loans ResidentialRealEstateInvestmentPropertyLoans	43652000	USD
CY2018Q4	aubn	Residential Real Estate Investment Property Loans ResidentialRealEstateInvestmentPropertyLoans	46374000	USD
CY2019Q4	aubn	Residential Real Estate Loans ResidentialRealEstateLoans	92575000	USD
CY2018Q4	aubn	Residential Real Estate Loans ResidentialRealEstateLoans	102597000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	4993000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	29160000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	29146000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	172603000	USD
CY2019Q4	aubn	Available For Sale Securities Fair Value AvailableForSaleSecuritiesFairValue	235902000	USD
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	233153000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	14437000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	23547000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	32963000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	168854000	USD
CY2018Q4	aubn	Available For Sale Securities Fair Value AvailableForSaleSecuritiesFairValue	239801000	USD
CY2018Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	244823000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	67601000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	26470000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	94071000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	31889000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	157875000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	189764000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	459043000	USD
CY2019Q4	aubn	Financing Receivable Recorded Investment30 To89 Days Past Due FinancingReceivableRecordedInvestment30To89DaysPastDue	2152000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2019Q4	aubn	Financing Receivable Recorded Investment Total Still Accruing FinancingReceivableRecordedInvestmentTotalStillAccruing	461195000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	187000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	475193000	USD
CY2018Q4	aubn	Financing Receivable Recorded Investment30 To89 Days Past Due FinancingReceivableRecordedInvestment30To89DaysPastDue	2106000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2018Q4	aubn	Financing Receivable Recorded Investment Total Still Accruing FinancingReceivableRecordedInvestmentTotalStillAccruing	477299000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	178000	USD
CY2019Q4	aubn	Financing Receivable Recorded Investment Pass FinancingReceivableRecordedInvestmentPass	450911000	USD
CY2019Q4	aubn	Financing Receivable Recorded Investment Special Mention FinancingReceivableRecordedInvestmentSpecialMention	5913000	USD
CY2019Q4	aubn	Financing Receivable Recorded Investment Substandard Accruing FinancingReceivableRecordedInvestmentSubstandardAccruing	4371000	USD
CY2018Q4	aubn	Financing Receivable Recorded Investment Pass FinancingReceivableRecordedInvestmentPass	466410000	USD
CY2018Q4	aubn	Financing Receivable Recorded Investment Special Mention FinancingReceivableRecordedInvestmentSpecialMention	4361000	USD
CY2018Q4	aubn	Financing Receivable Recorded Investment Substandard Accruing FinancingReceivableRecordedInvestmentSubstandardAccruing	6528000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	335000	USD
CY2019Q4	aubn	Impaired Financing Receivable Charge Off And Payments Applied ImpairedFinancingReceivableChargeOffAndPaymentsApplied	-236000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	99000	USD
CY2018Q4	aubn	Impaired Financing Receivable Troubled Debt Restructuring Still Accruing ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing	157000	USD
CY2018Q4	aubn	Impaired Financing Receivable Troubled Debt Restructuring Nonaccrual ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual	0	USD
CY2018Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2017Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	2697000	USD
CY2017Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	2528000	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	2111000	USD
CY2019Q4	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Unpaid Principal Balance ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueUnpaidPrincipalBalance	274227000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	220000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	182000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	151000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	126000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	105000	USD
CY2019Q4	aubn	Weighted Average Amortization In Years WeightedAverageAmortizationInYears	5.5	pure
CY2019Q4	aubn	Time Deposit Maturities Next Twelve Months TimeDepositMaturitiesNextTwelveMonths	92740000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	25432000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	36643000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	5812000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	6572000	USD
CY2019Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	0	USD
CY2019Q4	us-gaap	Time Deposits TimeDeposits	167199000	USD
CY2019Q4	aubn	Time Deposits250000 Or More TimeDeposits250000OrMore	57400000	USD
CY2018Q4	aubn	Time Deposits250000 Or More TimeDeposits250000OrMore	59400000	USD
CY2019Q4	aubn	Regulatory Capital Dividends Without Approval Of Regulators RegulatoryCapitalDividendsWithoutApprovalOfRegulators	8000000	USD
CY2019Q4	aubn	Regulatory Capital Restricted Investment From Dividends RegulatoryCapitalRestrictedInvestmentFromDividends	86800000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3149000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	8207000	USD
CY2019Q4	aubn	Liability Recorded For Standy Letters Of Credit LiabilityRecordedForStandyLettersOfCredit	39000	USD
CY2018Q4	aubn	Liability Recorded For Standy Letters Of Credit LiabilityRecordedForStandyLettersOfCredit	73000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	41000000	USD
CY2019Q4	aubn	Available For Sale Securities Pledged As Collateral For Securities Sold Under Agreements To Repurchase AvailableForSaleSecuritiesPledgedAsCollateralForSecuritiesSoldUnderAgreementsToRepurchase	2600000	USD
CY2018Q4	aubn	Available For Sale Securities Pledged As Collateral For Securities Sold Under Agreements To Repurchase AvailableForSaleSecuritiesPledgedAsCollateralForSecuritiesSoldUnderAgreementsToRepurchase	5600000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	19100000	USD
CY2018Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	19800000	USD
CY2019Q4	aubn	Deferred Tax Asset Allowance For Loan Loss DeferredTaxAssetAllowanceForLoanLoss	1102000	USD
CY2018Q4	aubn	Deferred Tax Asset Allowance For Loan Loss DeferredTaxAssetAllowanceForLoanLoss	1203000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	88000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	127000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1684000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2600000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	315000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	280000	USD
CY2019Q4	aubn	Deferred Tax Liabilities Originated Mortgage Servicing Rights DeferredTaxLiabilitiesOriginatedMortgageServicingRights	326000	USD
CY2018Q4	aubn	Deferred Tax Liabilities Originated Mortgage Servicing Rights DeferredTaxLiabilitiesOriginatedMortgageServicingRights	362000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	165000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	168000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1693000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	810000	USD
CY2019Q4	aubn	Deferred Tax Assets Liabilities Net1 DeferredTaxAssetsLiabilitiesNet1	-9000	USD
CY2018Q4	aubn	Deferred Tax Assets Liabilities Net1 DeferredTaxAssetsLiabilitiesNet1	1790000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-92000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2019	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4000000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4051000	USD
CY2019	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2099000	USD
CY2019Q4	aubn	Available For Sale Securities Gross Unrealized Losses AvailableForSaleSecuritiesGrossUnrealizedLosses	368000	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2308000	USD
CY2019Q4	aubn	Available For Sale Securities Gross Unrealized Gains2 AvailableForSaleSecuritiesGrossUnrealizedGains2	3117000	USD
CY2018Q4	aubn	Available For Sale Securities Gross Unrealized Gains2 AvailableForSaleSecuritiesGrossUnrealizedGains2	608000	USD
CY2018Q4	aubn	Available For Sale Securities Gross Unrealized Losses AvailableForSaleSecuritiesGrossUnrealizedLosses	5630000	USD
CY2019	aubn	Basic And Diluted Weighted Average Shares Outstanding BasicAndDilutedWeightedAverageSharesOutstanding	3581476	shares
CY2018	aubn	Basic And Diluted Weighted Average Shares Outstanding BasicAndDilutedWeightedAverageSharesOutstanding	3643780	shares
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	2.72
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	2.42
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.96
CY2019	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	3575000	USD
CY2018	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	3498000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	9000	USD
CY2019Q4	aubn	Percentage Of Loans Secured By Real Estate PercentageOfLoansSecuredByRealEstate	0.858	pure
CY2017Q4	aubn	Deferred Tax Assets Liabilities Net1 DeferredTaxAssetsLiabilitiesNet1	789000	USD
CY2018	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Servicing Fee ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageServicingFee	0.0025	pure
CY2019	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Servicing Fee ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageServicingFee	0.0025	pure
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	1320000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	32000	USD
CY2019Q4	us-gaap	Cost Method Investments CostMethodInvestments	1400000	USD
CY2018Q4	us-gaap	Cost Method Investments CostMethodInvestments	1400000	USD
CY2019	aubn	Servicing Asset At Amortized Value Amortization2 ServicingAssetAtAmortizedValueAmortization2	383000	USD
CY2018	aubn	Servicing Asset At Amortized Value Amortization2 ServicingAssetAtAmortizedValueAmortization2	411000	USD
CY2019	aubn	Servicing Asset At Amortized Value Valuation Allowance1 ServicingAssetAtAmortizedValueValuationAllowance1	0	USD
CY2018	aubn	Servicing Asset At Amortized Value Valuation Allowance1 ServicingAssetAtAmortizedValueValuationAllowance1	0	USD
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3643868	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3566146	shares
CY2019Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	2202000	USD
CY2018Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	383000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	1262000	USD
CY2019Q4	aubn	Commercial Real Estate Multifamily CommercialRealEstateMultifamily	44839000	USD
CY2018Q4	aubn	Commercial Real Estate Multifamily CommercialRealEstateMultifamily	40455000	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	3593463	shares
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4386000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4790000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	98328000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	89055000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	9741000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	8834000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	86906000	USD
CY2018	aubn	Cash Dividends Paid CashDividendsPaid	3498000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
CY2018	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	10000	USD
CY2019	aubn	Cash Dividends Paid CashDividendsPaid	3575000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2721000	USD
CY2019	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	6000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	168000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	201000	USD
CY2018	aubn	Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries FinancingReceivableAllowanceForCreditLossesNetChargeoffsRecoveries	33000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	408000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	254000	USD
CY2019	aubn	Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries FinancingReceivableAllowanceForCreditLossesNetChargeoffsRecoveries	-154000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	4386000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	461283000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	71000	USD
CY2018	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1447000	USD
CY2018	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1447000	USD
CY2018	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2	pure
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	pure
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1259000	USD
CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	15172000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	99000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	4790000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	477320000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	157000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	477477000	USD
CY2018	aubn	Income Tax Reconciliation Federal Tax Reform Impact IncomeTaxReconciliationFederalTaxReformImpact	0	USD
CY2018	aubn	Effective Income Tax Rate Reconciliation Federal Tax Reform Impact EffectiveIncomeTaxRateReconciliationFederalTaxReformImpact	0	pure
CY2019Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	147800000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	133100000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	368000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	164000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	204000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	447000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	5183000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	5630000	USD
CY2018Q4	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Unpaid Principal Balance ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueUnpaidPrincipalBalance	289981000	USD
CY2018	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed	0.083	pure
CY2018	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1	pure
CY2018	aubn	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Coupon Interest Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageCouponInterestRate	0.039	pure
CY2019	us-gaap	Interest Expense InterestExpense	4183000	USD
CY2018	us-gaap	Interest Expense InterestExpense	3676000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	26064000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	25570000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11931000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10653000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4664000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4544000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	19697000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	17874000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	6872000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	8338000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	4330000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	2529000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	717000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	749000	USD
CY2019	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-123000	USD
CY2018	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-153000	USD
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	13043000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	65076000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	92443000	USD
CY2019	us-gaap	Pension Expense PensionExpense	264000	USD
CY2018	us-gaap	Pension Expense PensionExpense	131000	USD
CY2019	aubn	Gain From Loan Guarantee Program GainFromLoanGuaranteeProgram	1717000	USD
CY2018	aubn	Gain From Loan Guarantee Program GainFromLoanGuaranteeProgram	0	USD
CY2019Q4	aubn	Deferred Tax Asset Right Of Use Liability DeferredTaxAssetRightOfUseLiability	198000	USD
CY2018Q4	aubn	Deferred Tax Asset Right Of Use Liability DeferredTaxAssetRightOfUseLiability	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2721000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019Q4	aubn	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities Gross DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecuritiesGross	690000	USD
CY2018Q4	aubn	Deferred Tax Liabilities Unrealized Gains On Available For Sale Securities Gross DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecuritiesGross	0	USD
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	02-26486
CY2019	dei	Entity Registrant Name EntityRegistrantName	Auburn National Bancorporation, Inc
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	63-0885779
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	100 N. Gay Street
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Auburn
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	AL
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	36830
CY2019	dei	City Area Code CityAreaCode	334
CY2019	dei	Local Phone Number LocalPhoneNumber	821-9200
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Small Business EntitySmallBusiness	true
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000750574
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2019Q2	dei	Entity Public Float EntityPublicFloat	76043895	USD
CY2019Q4	aubn	Deferred Tax Asset Bonus DeferredTaxAssetBonus	296000	USD
CY2018Q4	aubn	Deferred Tax Asset Bonus DeferredTaxAssetBonus	8000	USD
CY2019Q4	aubn	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	197000	USD
CY2018Q4	aubn	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	0	USD
CY2019Q4	aubn	Commericial Real Estate Loans CommericialRealEstateLoans	270318000	USD
CY2018Q4	aubn	Commericial Real Estate Loans CommericialRealEstateLoans	261896000	USD
CY2019Q4	aubn	Consumer Installment And Revolving Loans ConsumerInstallmentAndRevolvingLoans	8866000	USD
CY2018Q4	aubn	Consumer Installment And Revolving Loans ConsumerInstallmentAndRevolvingLoans	9295000	USD
CY2019	us-gaap	Reclassifications Reclassifications	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;color:#000000;' >Reclassifications </font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' >Certain amounts reported in the prior period have b</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >een reclassified to conform to the current-period presentation. These reclassifications had no impact on the Company’s previously reported net earnings or total stockholders’ equity.</font></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2019	aubn	Change In Depreciation For Change In Estimated Useful Life ChangeInDepreciationForChangeInEstimatedUsefulLife	200000	USD
CY2019	aubn	Accounting Estimate Change Effect Of Change On Basic And Diluted Eanrings Per Share AccountingEstimateChangeEffectOfChangeOnBasicAndDilutedEanringsPerShare	0.04
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	106000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	93000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	93000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	93000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	93000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	416000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	894000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	106000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.034	pure
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y10M24D
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	200000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	200000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	788000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	889000	USD
CY2019	aubn	Rent Expense Excluded From Right Of Use Asset RentExpenseExcludedFromRightOfUseAsset	100000	USD
CY2019	aubn	Rent Expense Included In Lease Liablilty RentExpenseIncludedInLeaseLiablilty	129000	USD
CY2019	us-gaap	Basis Of Accounting BasisOfAccounting	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Basis of Presentation</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiar</font><font style='font-family:Times New Roman;font-size:10pt;' >ies.</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >Auburn National Bancorporation Capital Trust I was an affiliate of th</font><font style='font-family:Times New Roman;font-size:10pt;' >e Company and was included in these consolidated financial statements pursuant to the equity method of accounting. On April 27, 2018, the Trust was dissolved. </font><font style='font-family:Times New Roman;font-size:10pt;' >Significant intercompany transactions </font><font style='font-family:Times New Roman;font-size:10pt;' >and accounts </font><font style='font-family:Times New Roman;font-size:10pt;' >are eliminated in consolidation. </font></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Use of Estimates</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure</font><font style='font-family:Times New Roman;font-size:10pt;' > of contingent assets and liabilities as of the balance sheet date and the reported amounts</font><font style='font-family:Times New Roman;font-size:10pt;' > of</font><font style='font-family:Times New Roman;font-size:10pt;' > income and expense during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to signifi</font><font style='font-family:Times New Roman;font-size:10pt;' >cant change in the near term include the determination of the allowance for loan losses</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;' >fair value measurements</font><font style='font-family:Times New Roman;font-size:10pt;' >, valuation of other real estate owned, and valuation of deferred tax assets.</font></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2018Q4	aubn	Impaired Financing Receivable Charge Off And Payments Applied ImpairedFinancingReceivableChargeOffAndPaymentsApplied	0	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	157000	USD
CY2019	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	9000	USD
CY2018	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	12000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	157000	USD
CY2019Q4	aubn	Initial Recognition Of Operating Lease Right Of Use Assets InitialRecognitionOfOperatingLeaseRightOfUseAssets	891000	USD
CY2019Q4	aubn	Initial Recognition Of Operating Lease Liabilities InitialRecognitionOfOperatingLeaseLiabilities	889000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	785000	USD
CY2019	aubn	Number Of Loan Outstanding For Loan Guarantee NumberOfLoanOutstandingForLoanGuarantee	5	pure
CY2019Q4	aubn	Amount Of Loan Outstanding For Loan Guarantee AmountOfLoanOutstandingForLoanGuarantee	10200000	USD
CY2019Q4	aubn	Carrying Value Of Assets Identified For Change In Useful Life Esitmate CarryingValueOfAssetsIdentifiedForChangeInUsefulLifeEsitmate	500000	USD

Files In Submission

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$AUBN
AUBURN NATIONAL BANCORPORATION, INC Stock $aubn

2020 Q1 Form 10-K Financial Statement

#000119312520064839 Filed on March 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AUBN AUBURN NATIONAL BANCORPORATION, INC Stock $aubn

2020 Q1 Form 10-K Financial Statement

#000119312520064839 Filed on March 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AUBN
AUBURN NATIONAL BANCORPORATION, INC Stock $aubn