Note 8 - Fair Value Measurements (Details) - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Financial Assets:
Cash and due from banks	$ 14,723	$ 13,283	$ 10,674	$ 14,783
Cash and due from banks	14,723	13,283
Interest-bearing deposits	108,841	97,376
Interest-bearing deposits	108,841	97,376
Securities	355,506	341,739
Restricted securities	1,089	1,414
Mortgage loans held for sale		1,276
Mortgage loans held for sale		1,276
Loans, net	580,751	587,463
Loans, net	568,229	616,755
Accrued interest receivable	5,893	5,949
Accrued interest receivable	5,893	5,949
Bank-owned life insurance	21,335	21,181
Bank-owned life insurance	21,335	21,181
Financial Liabilities:
Deposits	964,086	960,036
Deposits	974,549	966,080
Accrued interest payable	78	92
Accrued interest payable	79	92
Reported Value Measurement [Member]
Financial Assets:
Cash and due from banks	14,723	13,283
Interest-bearing deposits	108,841	97,376
Securities	355,799	346,385
Restricted securities	1,089	1,414
Mortgage loans held for sale		1,276
Loans, net	580,751	587,463
Accrued interest receivable	5,893	5,949
Bank-owned life insurance	21,335	21,181
Financial Liabilities:
Deposits	964,086	960,036
Accrued interest payable	78	92
Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and due from banks	14,723	13,283
Interest-bearing deposits	108,841	97,376
Accrued interest receivable	5,893	5,949
Bank-owned life insurance	21,335	21,181
Financial Liabilities:
Deposits	727,026	718,327
Accrued interest payable	78	92
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Securities	355,506	341,739
Restricted securities	1,089	1,414
Mortgage loans held for sale		1,276
Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Loans, net	568,229	616,755
Financial Liabilities:
Deposits	$ 247,523	$ 247,753