Note 4 - Loans and Allowance for Loan Losses - Allowance for Loan Losses and the Recorded Investment In Loans by Impairment Method (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Individually evaluated for impairment	$ 2,948	$ 2,894
Collectively evaluated for impairment	6,396	7,421
Total ending allowance balance	9,344	10,315	$ 13,968	$ 20,577
Loans individually evaluated for impairment	41,895	37,182
Loans collectively evaluated for impairment	929,080	922,093
Loans, net of unearned income	970,975	959,275
Real Estate Portfolio Segment [Member]
Individually evaluated for impairment	2,566	2,515
Collectively evaluated for impairment	5,639	6,658
Total ending allowance balance	8,205	9,173	12,542	18,716
Loans individually evaluated for impairment	41,311	36,625
Loans collectively evaluated for impairment	829,581	820,411
Loans, net of unearned income	870,892	857,036
Commercial Portfolio Segment [Member]
Individually evaluated for impairment	236	223
Collectively evaluated for impairment	618	597
Total ending allowance balance	854	820	1,153	1,409
Loans individually evaluated for impairment	438	400
Loans collectively evaluated for impairment	90,410	89,420
Loans, net of unearned income	90,848	89,820
Consumer Portfolio Segment [Member]
Individually evaluated for impairment	146	156
Collectively evaluated for impairment	139	166
Total ending allowance balance	285	322	$ 273	$ 452
Loans individually evaluated for impairment	146	157
Loans collectively evaluated for impairment	9,089	12,262
Loans, net of unearned income	$ 9,235	$ 12,419