Note 5 - Loans (Details) - Internal Credit Quality Indicators of Gross Loans (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 805,059	$ 767,513
Single-family Real Estate, Revolving, Open-end Loans [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	79,667	69,121
Single-family Real Estate, Revolving, Open-end Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	977	797
Single-family Real Estate, Revolving, Open-end Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	80,644	69,918
Single Family Residential Closed End First Lien [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	119,079	101,100
Single Family Residential Closed End First Lien [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,928	3,176
Single Family Residential Closed End First Lien [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	121,007	104,276
Single Family Residential Closed End Junior Lien [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,710	3,802
Single Family Residential Closed End Junior Lien [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	78	129
Single Family Residential Closed End Junior Lien [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,788	3,931
Single Family Residential [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	201,456	174,023
Single Family Residential [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,983	4,102
Single Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	204,439	178,125
Indirect Automobile [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	66,161	38,514
Indirect Automobile [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	116	210
Indirect Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	66,277	38,724
Consumer Other Financing Receivable [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	10,673	11,349
Consumer Other Financing Receivable [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	34	26
Consumer Other Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	10,707	11,375
Consumer [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	76,834	49,863
Consumer [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	150	236
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	76,984	50,099
All Other [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	12,684	10,759
All Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 12,684	$ 10,759