Note 8 - Fair Value Measurements (Details) - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Financial Assets:
Cash and due from banks	$ 12,815	$ 13,283	$ 13,806	$ 14,783
Interest-bearing deposits	87,621	98,066
Restricted securities	1,089	1,414
Mortgage loans held for sale	725	1,276
Loans, net	587,770	587,463
Accrued interest receivable	5,708	5,949
Bank-owned life insurance	21,643	21,181
Financial Liabilities:
Deposits	948,923	960,036
Accrued interest payable	67	92
Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and due from banks	12,815	13,283
Interest-bearing deposits	87,621	98,066
Accrued interest receivable	5,708	5,949
Bank-owned life insurance	21,643	21,181
Financial Liabilities:
Deposits	724,993	718,327
Accrued interest payable	67	92
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Securities	372,429	341,049
Restricted securities	1,089	1,414
Mortgage loans held for sale	725	1,276
Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Loans, net	649,041	616,755
Financial Liabilities:
Deposits	223,261	247,753
Reported Value Measurement [Member]
Financial Assets:
Cash and due from banks	12,815	13,283
Interest-bearing deposits	87,621	98,066
Securities	367,477	345,695
Restricted securities	1,089	1,414
Mortgage loans held for sale	725	1,276
Loans, net	587,770	587,463
Accrued interest receivable	5,708	5,949
Bank-owned life insurance	21,643	21,181
Financial Liabilities:
Deposits	948,923	960,036
Accrued interest payable	67	92
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and due from banks	12,815	13,283
Interest-bearing deposits	87,621	98,066
Securities	372,429	341,049
Restricted securities	1,089	1,414
Mortgage loans held for sale	725	1,276
Loans, net	649,041	616,755
Accrued interest receivable	5,708	5,949
Bank-owned life insurance	21,643	21,181
Financial Liabilities:
Deposits	948,254	966,080
Accrued interest payable	$ 67	$ 92