Note 3 - Investment Securities Available for Sale (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Available-for-sale Securities Pledged as Collateral	$ 1,600,000	$ 1,200,000
Available-for-sale Securities, Amortized Cost Basis	57,664,000	61,179,000
Collateral Required for Deposits Minimum Balance [Member]
Cash, FDIC Insured Amount	250,000
Federal Reserve Bank Transaction Settlements [Member]
Available-for-sale Securities Pledged as Collateral	12,900,000	8,900,000
Call Options [Member]
Available-for-sale Securities, Amortized Cost Basis	37,400,000	48,500,000
Callable Within One Year [Member]
Available-for-sale Securities, Amortized Cost Basis	$ 8,000,000	$ 26,600,000