Note 11 - Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
Note 11 - Income Taxes (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%	35.00%
Income Tax Credits and Adjustments						$ 159,000
Income Tax Expense (Benefit) Increase (Decrease)	$ 20,000	$ 20,000	$ 40,000	$ 41,000		83,000
Unrecognized Tax Benefits	0		0
Other Assets [Member]
Note 11 - Income Taxes (Details) [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 862,000		$ 862,000			$ 906,000
Scenario, Forecast [Member]
Note 11 - Income Taxes (Details) [Line Items]
Income Tax Credits and Adjustments					$ 158,000
Income Tax Expense (Benefit) Increase (Decrease)					$ 80,000