Note 4 - Loans and Allowance for Loan Losses (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ 48	$ 93
Allowance for Loan and Lease Losses, Write-offs	0	1,422
Impaired Financing Receivable, Related Allowance	2,212	2,164
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 823	$ 995
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Minimum Loan Balance for Loans Evaluated by Risk Categories	$ 500
Specific Reserves [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Write-offs		$ 1,304
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Increase (Decrease) in Other Loans	$ (611)
Change in Troubled Debt Restructurings	3.80%
Percentage of Loan Portfolio	82.00%	81.00%
Impaired Financing Receivable, Related Allowance	$ 1,717	$ 1,669
Unsecured [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Percentage of Loan Portfolio	6.09%	6.06%
Residential Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Real Estate Acquired Through Foreclosure	$ 951	$ 1,131
Mortgage Loans in Process of Foreclosure, Amount	$ 1,114	988
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Nonowner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts	2
Impaired Financing Receivable, Related Allowance	$ 105	$ 107

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

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Amount of increase (decrease) of allowance reserve for credit loss.

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-Publisher FASB
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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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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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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