Note 7 - Loans And Related Allowance For Loan Losses (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commercial and Industrial [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts	1	2	6	8
Commercial and Industrial [Member] | Other Modification [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts				1
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts	1	2	6	9
Troubled Debt Restructurings Pre-Modification Outstanding Recorded Investment (in Dollars)	$ 137	$ 13	$ 879	$ 243
Residential Real Estate Mortgage [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts		6	2	8
Residential Real Estate Mortgage [Member] | Other Modification [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts		1		2
Residential Real Estate Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts		7	2	10
Troubled Debt Restructurings Pre-Modification Outstanding Recorded Investment (in Dollars)		619	383	946
Consumer Installment [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts		1	1	2
Consumer Installment [Member]
Financing Receivable, Modifications [Line Items]
Trouble Debt Restructurings Number of Contracts		1	1	2
Troubled Debt Restructurings Pre-Modification Outstanding Recorded Investment (in Dollars)		$ 6	$ 644	$ 11