Note 2 - Securities (Details) - Debt Securities by Maturity	Sep. 30, 2015 USD ($)
Note 2 - Securities (Details) - Debt Securities by Maturity [Line Items]
Due in 2015	2.12%
Due in 2015	$ 8,409,000
Due in 2015	$ 8,471,000
Due in 2016 through 2020	1.42%
Due in 2016 through 2020	$ 150,774,000
Due in 2016 through 2020	$ 151,190,000
Due in 2021 through 2025	3.09%
Due in 2021 through 2025	$ 57,813,000
Due in 2021 through 2025	$ 58,359,000
Due in 2026 and beyond	3.56%
Due in 2026 and beyond	$ 74,302,000
Due in 2026 and beyond	$ 74,231,000
	2.21%
	$ 365,456,000
	$ 367,173,000
Collateralized Mortgage Backed Securities [Member]
Note 2 - Securities (Details) - Debt Securities by Maturity [Line Items]
No single maturity, weighted average yield	1.69%
No single maturity, amortized cost	$ 72,211,000
No single maturity, fair value	$ 72,964,000
Other Debt Obligations [Member]
Note 2 - Securities (Details) - Debt Securities by Maturity [Line Items]
No single maturity, weighted average yield	2.53%
No single maturity, amortized cost	$ 1,947,000
No single maturity, fair value	$ 1,958,000