Note 4 - Loans and Allowance for Loan Losses (Details) - Acquired Impaired Loans Accretable Yield (USD $)	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Acquired Impaired Loans Accretable Yield [Abstract]
Balance	$ 5,241,000		$ 4,998,000
Additions	0
Accretion income	(646,000)
Net reclassification from nonaccretable to accretable	941,000
Reductions (1)	$ (52,000)	[1]

[1] Reductions primarily reflect the result of exit events, including loan payoffs and charge-offs.