Note 9 - Qualified Affordable Housing Project Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Note 9 - Qualified Affordable Housing Project Investments (Details) [Line Items]
Proportional Amortization Method Qualified Affordable Housing Project Investments	$ 5,164		$ 5,164			$ 5,636
Proportional Amortization Method Qualified Affordable Housing Project Investments, Unfunded Liability Obligation	1,486		$ 1,486			2,424
Qualified Affordable Housing Project Investments Term			16 years
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			34.00%
Proportional Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 180	$ 232	$ 361	[1]	$ 405	$ 903	[1]
Minimum [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) [Line Items]
Qualified Affordable Housing Project Investments, Return Rate			4.36%
Maximum [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) [Line Items]
Qualified Affordable Housing Project Investments, Return Rate			7.14%

[1] This amount reduces the tax credits and benefits generated by the Qualified Affordable Housing Projects.