Note 4 - Loans and Allowance for Loan Losses - Risk Category of Consumer Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Loans, net of unearned income	$ 970,975	$ 959,275
Consumer Portfolio Segment [Member]
Loans, net of unearned income	9,235	12,419
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	4,554	6,665
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	4,681	5,754
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	4,550	6,655
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	4,538	5,611
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Loans, net of unearned income	4	10
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Loans, net of unearned income	$ 143	$ 143