Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Summary of Ratios for Allowance for Loan Losses	3 Months Ended				12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Summary of Ratios for Allowance for Loan Losses [Abstract]
Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees	1.41%		1.44%		1.38%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees(1)	0.02%	[1]	0.50%	[1]	0.28%	[1]

[1] Net charge-offs are on an annualized basis.