Note 3 - Loans and Allowance for Loan Losses (Details) - Loans by Class Modified as Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Number of Loans	8	3
Real Estate Mortgage Residential [Member] | TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	3	1
Pre-Modification Outstanding Recorded Investment	$ 309	$ 72
Post-Modification Outstanding Recorded Investment	309	72
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] | TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1	1
Pre-Modification Outstanding Recorded Investment	598	8,796
Post-Modification Outstanding Recorded Investment	598	8,717
Commercial And Industrial [Member] | TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1
Pre-Modification Outstanding Recorded Investment	13
Post-Modification Outstanding Recorded Investment	13
Consumer Secured [Member] | TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	3
Pre-Modification Outstanding Recorded Investment	16
Post-Modification Outstanding Recorded Investment	16
Consumer Unsecured [Member] | TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		38
Post-Modification Outstanding Recorded Investment		38
TDR Identified Current Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	8	3
Pre-Modification Outstanding Recorded Investment	936	8,906
Post-Modification Outstanding Recorded Investment	$ 936	$ 8,827