Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	$ 333,304	$ 333,158
Performing Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	329,596	329,128
Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	3,708	4,030
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	43,757	42,849
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	20,138	18,291
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	44,486	48,390
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Automobile Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	43,741	42,816
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Home Equity Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	20,054	18,188
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] | Other Consumer Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	44,480	48,264
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Automobile Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	16	33
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Home Equity Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	84	103
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Consumer Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	6	126
Residential Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	224,923	223,628
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	221,321	219,860
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans [Line Items]
Loans receivable	$ 3,602	$ 3,768