Note 4 - Securities (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]
Security Owned and Pledged as Collateral, Fair Value	$ 50,241,000
Held-to-maturity Securities Pledged as Collateral	17,800,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	73	196
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	$ 22,000	$ 0	$ 0