Note 7 - Loans and Allowance for Loan Losses (Details) (USD $)	3 Months Ended	9 Months Ended			9 Months Ended		21 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2013 Debt by Borrowers Discharged under Chapter Seven Bankruptcy [Member]	Sep. 30, 2013 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2014 Restructured Credit with a Subsequent Default [Member]	Sep. 30, 2013 TDR Financing Receivable [Member]	Sep. 30, 2013 TDR Financing Receivable [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Credit Losses, Change in Method of Calculating Impairment		$ 2,300,000		$ 2,700,000
Loans and Leases Receivable, Impaired, Commitment to Lend		0		0
Financing Receivable, Modifications, Number of Contracts		0	7		6
Financing Receivable, Modifications, Recorded Investment		25,289,000		26,255,000	331,000
Troubled Debt Restructuring, Maturity Date Extension						48 months
Allowance for Loan and Lease Losses, Period Increase (Decrease)								7,000	30,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0		0				0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 9,000