Note 4 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Loans	$ 777,957	$ 734,901
Less: Allowance for loan losses	(7,313)	(7,699)
Loans, net	770,644	727,202
Residential Portfolio Segment [Member]
Loans	318,244	286,022
Commercial Real Estate Portfolio Segment [Member]
Loans	214,843	214,007
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Owner Occupied [Member]
Loans	72,525	77,605
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Nonowner Occupied [Member]
Loans	99,966	90,532
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans	42,352	45,870
Commercial and Industrial Portfolio Segment [Member]
Loans	103,550	100,589
Consumer Portfolio Segment [Member]
Loans	141,320	134,283
Consumer Portfolio Segment [Member] \| Automobile Loan [Member]
Loans	67,999	59,772
Consumer Portfolio Segment [Member] \| Home Equity Loan [Member]
Loans	21,287	20,861
Consumer Portfolio Segment [Member] \| Other Consumer Loans [Member]
Loans	$ 52,034	$ 53,650

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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