Note 8 - Loans and Allowance for Loan Losses (Details) - Retail Loans by Credit Quality (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 536,627	$ 501,752
Retail:1-4 Family Residential Mortgages [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	35,512	29,329
Retail:1-4 Family Residential Mortgages [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	231	401
Retail:1-4 Family Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	35,743	29,730
Retail Home Equity Loans And Lines [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	63,979	59,712
Retail Home Equity Loans And Lines [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	153	265
Retail Home Equity Loans And Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	64,132	59,977
Retail:Consumer [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,259	3,099
Retail:Consumer [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		17
Retail:Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,259	3,116
Total Retail Loans [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	103,750	92,140
Total Retail Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	384	683
Total Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 104,134	$ 92,823