Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Nonperforming Assets (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Nonperforming assets:
Nonaccrual loans		$ 1,751	$ 2,043	$ 2,870
Restructured loans in nonaccrual		4,454	4,639	6,035
Total nonperforming loans		6,205	6,682	8,905
Other real estate owned, net		3,425	4,165	4,441
Total nonperforming assets		$ 9,630	$ 10,847	$ 13,346
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned		1.52%	1.74%	2.11%
Ratio of allowance for loan losses to nonperforming loans(1)	[1]	132.07%	124.17%	91.31%

[1] The Company defines nonperforming loans as nonaccrual loans. Loans 90 days or more past due and still accruing and accruing restructured loans are excluded.