Note 2 - Investment Securities (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Note 2 - Investment Securities (Details) [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		46
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		23,313,000		32,017,000
Gain (Loss) on Sale of Securities, Net	8,000	108,000	116,000
US Government Agencies Debt Securities [Member]
Note 2 - Investment Securities (Details) [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		22
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		13,209,000		11,573,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 2 - Investment Securities (Details) [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		9
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		4,814,000		7,006,000
US States and Political Subdivisions Debt Securities [Member]
Note 2 - Investment Securities (Details) [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		15
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		$ 5,290,000		$ 13,438,000