Note 3 - Trading Account Assets (Details) - Components of Trading Account Assets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total trading account assets	$ 5,381	$ 5,118
Trading, Municipal Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Municipal bonds	4,765	3,771
Trading, Insured Bank Deposits [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Insured bank deposits	$ 616	$ 1,347