Note 4 - Loans and Allowance for Loan Losses - Troubled Debt Restructuring by Accrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Ending balance	$ 439,855	$ 414,617
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
Ending balance	137,019	136,960
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Ending balance	107,672	100,340
Commercial Portfolio Segment [Member]
Ending balance	36,417	34,203
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Ending balance	53,003	50,978
Nonperforming Financial Instruments [Member]
TDR accruing	703	858
TDR nonaccrual	673	106
Ending balance	1,376	964
TDR related allowance for loan losses	44
Nonperforming Financial Instruments [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
TDR accruing	295	487
TDR nonaccrual	302	106
Ending balance	597	593
TDR related allowance for loan losses
Nonperforming Financial Instruments [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
TDR accruing	190	356
TDR nonaccrual	371
Ending balance	561	356
TDR related allowance for loan losses	44
Nonperforming Financial Instruments [Member] \| Commercial Portfolio Segment [Member]
TDR accruing	218
TDR nonaccrual
Ending balance	218
TDR related allowance for loan losses
Nonperforming Financial Instruments [Member] \| Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
TDR accruing		15
TDR nonaccrual
Ending balance		$ 15
TDR related allowance for loan losses

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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