Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Summary of Nonperforming Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013
Summary of Nonperforming Assets [Abstract]
Nonaccrual loans	$ 5,071		$ 5,732		$ 10,734
Restructured loans in nonaccrual	1,007		852		1,691
Total nonperforming loans	6,078		6,584		12,425
Other real estate owned, net	4,901		4,712		1,094
Total nonperforming assets	$ 10,979		$ 11,296		$ 13,519
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned	1.85%		1.88%		2.35%
Ratio of allowance for loan losses to nonperforming loans(1)	136.51%	[1]	124.95%	[1]	66.73%	[1]

[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.