Note 3 - Trading Account Assets (Details) - Components of Trading Account Assets (USD $)	Sep. 30, 2013	Dec. 31, 2012
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total trading account assets	$ 5,027,000	$ 0
Trading, Municipal Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Municipal bonds	1,704,000
Trading, Insured Bank Deposits [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Insured bank deposits	$ 3,323,000