Note 7 - Loans And Related Allowance For Loan Losses (Detail) - Primary Segments of the Loan Portfolio (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loans:
Individually evaluated for impairment	$ 19,391	$ 21,288
Collectively evaluated for impairment	387,663	387,145
Total loans	407,054	408,433
Commercial and Industrial [Member]
Loans:
Individually evaluated for impairment	2,975	4,592
Collectively evaluated for impairment	52,426	57,596
Total loans	55,401	62,188
Real Estate Construction [Member]
Loans:
Individually evaluated for impairment	3,772	3,993
Collectively evaluated for impairment	19,045	18,529
Total loans	22,817	22,522
Residential Real Estate Mortgage [Member]
Loans:
Individually evaluated for impairment	5,794	5,761
Collectively evaluated for impairment	193,269	198,111
Total loans	199,063	203,872
Commercial Real Estate Mortgage [Member]
Loans:
Individually evaluated for impairment	6,832	6,914
Collectively evaluated for impairment	118,967	108,820
Total loans	125,799	115,734
Consumer Installment [Member]
Loans:
Individually evaluated for impairment	18	28
Collectively evaluated for impairment	3,956	4,089
Total loans	$ 3,974	$ 4,117