Note 3 - Investment Securities Available for Sale (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Available-for-sale Securities Pledged as Collateral	$ 1,600,000	$ 1,600,000
Available-for-sale Securities, Amortized Cost Basis	50,640,000	52,562,000
Collateral Required for Deposits Minimum Balance [Member]
Cash, FDIC Insured Amount	250,000
Federal Reserve Bank Primary Discount Window [Member]
Available-for-sale Securities Pledged as Collateral	8,000,000	7,900,000
Call Options [Member]
Available-for-sale Securities, Amortized Cost Basis	34,800,000	36,800,000
Callable Within One Year [Member]
Available-for-sale Securities, Amortized Cost Basis	$ 7,800,000	$ 9,200,000