Note 8 - Fair Value Measurements (Details) - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and due from banks	$ 13,806	$ 14,783
Interest-bearing deposits	62,776	96,597
Accrued interest receivable	6,044	6,247
Bank-owned life insurance	21,020	20,523
Financial Liabilities:
Deposits	674,924	669,028
Accrued interest payable	97	139
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Securities	352,901	360,661
Restricted securities	1,414	1,689
Mortgage loans held for sale	617	2,796
Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Loans, net	590,117	570,471
Financial Liabilities:
Deposits	250,304	272,820
Reported Value Measurement [Member]
Financial Assets:
Cash and due from banks	13,806	14,783
Interest-bearing deposits	62,776	96,597
Securities	356,977	350,354
Restricted securities	1,414	1,689
Mortgage loans held for sale	617	2,796
Loans, net	582,574	583,813
Accrued interest receivable	6,044	6,247
Bank-owned life insurance	21,020	20,523
Financial Liabilities:
Deposits	923,498	946,766
Accrued interest payable	97	139
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and due from banks	13,806	14,783
Interest-bearing deposits	62,776	96,597
Securities	352,901	360,661
Restricted securities	1,414	1,689
Mortgage loans held for sale	617	2,796
Loans, net	590,117	570,471
Accrued interest receivable	6,044	6,247
Bank-owned life insurance	21,020	20,523
Financial Liabilities:
Deposits	925,228	941,848
Accrued interest payable	$ 97	$ 139