Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment in Loans by Impairment Method - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	$ 2,894	$ 3,371
Allowance for loan losses collectively evaluated for impairment	7,421	10,597
Total ending allowance balance	10,315	13,968	$ 20,577	$ 24,445
Loans
Loans individually evaluated for impairment	37,182	43,955
Loans collectively evaluated for impairment	922,093	887,988
Total loans, net of unearned income	959,275	931,943
Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	2,515	3,275
Allowance for loan losses collectively evaluated for impairment	6,658	9,267
Total ending allowance balance	9,173	12,542	18,716	22,254
Loans
Loans individually evaluated for impairment	36,625	43,837
Loans collectively evaluated for impairment	820,411	789,507
Total loans, net of unearned income	857,036	833,344
Commercial Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	223	71
Allowance for loan losses collectively evaluated for impairment	597	1,082
Total ending allowance balance	820	1,153	1,409	1,513
Loans
Loans individually evaluated for impairment	400	93
Loans collectively evaluated for impairment	89,420	85,093
Total loans, net of unearned income	89,820	85,186
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	156	25
Allowance for loan losses collectively evaluated for impairment	166	248
Total ending allowance balance	322	273	$ 452	$ 678
Loans
Loans individually evaluated for impairment	157	25
Loans collectively evaluated for impairment	12,262	13,388
Total loans, net of unearned income	$ 12,419	$ 13,413