Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Residential and Consumer Loans - USD ($) $ in Thousands	Sep. 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	$ 334,226	$ 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	330,488	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	3,738	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	44,473	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	20,501	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	44,760	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	44,349	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	20,390	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	44,724	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	124	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	111	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	36	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	224,492	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	221,025	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	$ 3,467	$ 3,768