Note 8 - Loans and Allowance for Loan Losses (Details) - Retail Loans by Credit Quality (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	$ 521,838	$ 501,752
Retail:1-4 Family Residential Mortgages [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	31,096	29,329
Retail:1-4 Family Residential Mortgages [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	397	401
Retail:1-4 Family Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	31,493	29,730
Retail Home Equity Loans And Lines [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	59,275	59,712
Retail Home Equity Loans And Lines [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	319	265
Retail Home Equity Loans And Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	59,594	59,977
Retail:Consumer [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	3,544	3,099
Retail:Consumer [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans		17
Retail:Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	3,544	3,116
Total Retail Loans [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	93,915	92,140
Total Retail Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	716	683
Total Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Retail Loans	$ 94,631	$ 92,823