Note 2 - Fair Value of Financial Instruments (Detail) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Selling Costs	10.00%
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	$ 0	$ 0
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,853,000		3,491,000
Impaired Financing Receivable, Related Allowance	2,078,000		655,000
Allowance for Loan and Lease Losses, Adjustments, Net	2,343,000	(32,000)
Other Real Estate Owned Net			2,948,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets	3,234,000		4,256,000
Real Estate Owned, Valuation Allowance, Amounts Applied			1,266,000
Real Estate, Write-down or Reserve, Amount			1,266,000
Evaluated for Impairment [Member]
Other Real Estate, Foreclosed Assets, and Repossessed Assets			$ 4,214,000