Note 4 - Nonaccrual Loans and Loans Past Due 90 Days Or More and Still Accruing (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Residential Portfolio Segment [Member]
Loans past due 90 days and still accruing	$ 142	$ 20
Nonaccrual	2,185	2,048
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member]
Loans past due 90 days and still accruing	135
Nonaccrual	394	404
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member]
Loans past due 90 days and still accruing
Nonaccrual	2,402	2,737
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans past due 90 days and still accruing
Nonaccrual	182	769
Commercial and Industrial Portfolio Segment [Member]
Loans past due 90 days and still accruing	75
Nonaccrual	1,200	1,152
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans past due 90 days and still accruing	56	18
Nonaccrual	16	27
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Loans past due 90 days and still accruing
Nonaccrual	32	96
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans past due 90 days and still accruing	46	1
Nonaccrual		3
Loans past due 90 days and still accruing	454	39
Nonaccrual	$ 6,411	$ 7,236