Note 7 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment in Loans by Impairment Method - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	$ 3,059		$ 3,371
Allowance for loan losses collectively evaluated for impairment	9,140		10,597
Total ending allowance balance	12,199	$ 12,606	13,968	$ 17,123	$ 18,690	$ 20,577
Loans
Loans individually evaluated for impairment	42,557		43,955
Loans collectively evaluated for impairment	890,748		887,988
Total loans, net of unearned income	933,305		931,943
Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	2,625		3,275
Allowance for loan losses collectively evaluated for impairment	8,181		9,267
Total ending allowance balance	10,806	11,522	12,542	15,448	17,114	18,716
Loans
Loans individually evaluated for impairment	41,623		43,837
Loans collectively evaluated for impairment	786,714		789,507
Total loans, net of unearned income	828,337		833,344
Commercial Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	270		71
Allowance for loan losses collectively evaluated for impairment	787		1,082
Total ending allowance balance	1,057	866	1,153	1,338	1,201	1,409
Loans
Loans individually evaluated for impairment	769		93
Loans collectively evaluated for impairment	91,964		85,093
Total loans, net of unearned income	92,733		85,186
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	164		25
Allowance for loan losses collectively evaluated for impairment	172		248
Total ending allowance balance	336	$ 218	273	$ 337	$ 375	$ 452
Loans
Loans individually evaluated for impairment	165		25
Loans collectively evaluated for impairment	12,070		13,388
Total loans, net of unearned income	$ 12,235		$ 13,413