Note 4 - Loans and Allowance for Loan Losses (Details Textual) $ in Thousands	3 Months Ended
Mar. 31, 2018 USD ($)	Mar. 31, 2017	Dec. 31, 2017 USD ($)
Increase (Decrease) in Other Loans	$ (2,140)
Change In Troubled Debt Restructurings	(12.60%)
Impaired Financing Receivable, Related Allowance	$ 92		$ 94
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 1,808		846
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Minimum Loan Balance For Loans Evaluated by Risk Categories	$ 500
Troubled Debt Restructurings [Member]
Impaired Financing Receivable, Related Allowance	$ 92		$ 94
Unsecured [Member]
Percentage of Loan Portfolio	4.69%		4.86%
Residential Portfolio Segment [Member]
Real Estate Acquired Through Foreclosure	$ 331		$ 262
Mortgage Loans in Process of Foreclosure, Amount	$ 864		$ 2,410

The change during the period in loans modified as troubled debt restructurings.

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- Definition

Minimum loan balance for impaired loans on nonaccrual status or nonperforming in nature.

+ References

No definition available.

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- Definition

The percentage of the loan portfolio.

+ References

No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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Amount of allowance for credit losses related to recorded investment.

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Amount of increase (decrease) in loans classified as other.

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Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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