Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	$ 927,389	$ 931,943
Consumer Secured [Member] | Performing Financing Receivable [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	7,503	7,963
Consumer Secured [Member] | Nonperforming Financing Receivable [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	13	0
Consumer Secured [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	7,516	7,963
Consumer Unsecured [Member] | Performing Financing Receivable [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	5,182	5,441
Consumer Unsecured [Member] | Nonperforming Financing Receivable [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	16	9
Consumer Unsecured [Member]
Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer [Line Items]
Loans	$ 5,198	$ 5,450