Note 9 - Qualified Affordable Housing Project Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Note 9 - Qualified Affordable Housing Project Investments (Details) [Line Items]
Proportional Amortization Method Qualified Affordable Housing Project Investments	$ 5,349			$ 5,636
Proportional Amortization Method Qualified Affordable Housing Project Investments, Unfunded Liability Obligation	1,853			2,424
Qualified Affordable Housing Project Investments Term	16 years
Affordable Housing Tax Credits, Amount	164		120
Affordable Housing Tax Benefits, Amount	48		38
Proportional Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 178	[1]	$ 74	$ 903	[1]
Minimum [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) [Line Items]
Qualified Affordable Housing Project Investments, Return Rate	4.28%
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.