Note 3 - Securities (Details) - Debt Securities by Maturity (USD $)	Dec. 31, 2014
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]
Due in one year or less	0.72%
Due in one year or less	$ 27,651,000
Due in one year or less	27,662,000
Due from one to five years	1.35%
Due from one to five years	148,233,000
Due from one to five years	147,974,000
Due from five to ten years	2.99%
Due from five to ten years	70,282,000
Due from five to ten years	70,191,000
Due after ten years	3.62%
Due after ten years	91,844,000
Due after ten years	91,596,000
	2.17%
	432,591,000
	432,912,000
Collateralized Mortgage Backed Securities [Member]
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]
No single maturity, weighted average yield	1.79%
No single maturity, amortized cost	92,656,000
No single maturity, fair value	93,561,000
Other Debt Obligations [Member]
Note 3 - Securities (Details) - Debt Securities by Maturity [Line Items]
No single maturity, weighted average yield	2.57%
No single maturity, amortized cost	1,925,000
No single maturity, fair value	$ 1,928,000