Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Interest Only Payments [Member] | Performing to Modified Terms [Member] | Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	$ 249
Post-Modification Recorded Investment	249
Interest Only Payments [Member] | Not Performing to Modified Terms [Member] | Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	0
Post-Modification Recorded Investment	0
Maturity Extension at Lower Stated Rate Than Market Rate [Member] | Performing to Modified Terms [Member] | Home Equity Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	218
Post-Modification Recorded Investment	218
Maturity Extension at Lower Stated Rate Than Market Rate [Member] | Not Performing to Modified Terms [Member] | Home Equity Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	0
Post-Modification Recorded Investment	0
Reduction of Principal and Interest Payments [Member] | Performing to Modified Terms [Member] | Commercial Real Estate Owner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment		4,308
Post-Modification Recorded Investment		4,266
Reduction of Principal and Interest Payments [Member] | Performing to Modified Terms [Member] | Commercial Real Estate Nonowner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment		686
Post-Modification Recorded Investment		676
Reduction of Principal and Interest Payments [Member] | Not Performing to Modified Terms [Member] | Commercial Real Estate Owner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment		0
Post-Modification Recorded Investment		0
Reduction of Principal and Interest Payments [Member] | Not Performing to Modified Terms [Member] | Commercial Real Estate Nonowner Occupied [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment		0
Post-Modification Recorded Investment		0
Performing to Modified Terms [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	467	4,994
Post-Modification Recorded Investment	467	4,942
Not Performing to Modified Terms [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Post-Modification Balances of TDR Loan Modifications [Line Items]
Pre-Modification Recorded Investment	0	0
Post-Modification Recorded Investment	$ 0	$ 0