Note 8 - Fair Value Measurements (Details) - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Financial Assets:
Cash and due from banks	$ 15,917	$ 13,283	$ 13,474	$ 14,783
Cash and due from banks	15,917	13,283
Interest-bearing deposits	106,112	98,066
Interest-bearing deposits	106,112	98,066
Securities	361,589	341,049
Restricted securities	1,089	1,414
Mortgage loans held for sale	383	1,276
Mortgage loans held for sale	383	1,276
Loans, net	585,429	587,463
Loans, net	576,676	616,755
Accrued interest receivable	5,798	5,949
Accrued interest receivable	5,798	5,949
Bank-owned life insurance	21,491	21,181
Bank-owned life insurance	21,491	21,181
Financial Liabilities:
Deposits	967,463	960,036
Deposits	972,417	966,080
Accrued interest payable	71	92
Accrued interest payable	71	92
Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and due from banks	15,917	13,283
Interest-bearing deposits	106,112	98,066
Accrued interest receivable	5,798	5,949
Bank-owned life insurance	21,491	21,181
Financial Liabilities:
Deposits	736,286	718,327
Accrued interest payable	71	92
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Securities	361,589	341,049
Restricted securities	1,089	1,414
Mortgage loans held for sale	383	1,276
Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Loans, net	576,676	616,755
Financial Liabilities:
Deposits	236,131	247,753
Reported Value Measurement [Member]
Financial Assets:
Cash and due from banks	15,917	13,283
Interest-bearing deposits	106,112	98,066
Securities	358,363	345,695
Restricted securities	1,089	1,414
Mortgage loans held for sale	383	1,276
Loans, net	585,429	587,463
Accrued interest receivable	5,798	5,949
Bank-owned life insurance	21,491	21,181
Financial Liabilities:
Deposits	967,463	960,036
Accrued interest payable	$ 71	$ 92