Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Allowance Roll-forward and Related Loan Balance by Portfolio Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	$ 7,971	$ 7,952	$ 8,227	$ 8,349
Charge-offs	(324)	(196)	(1,568)	(1,680)
Recoveries	28	31	212	92
Provision for loan losses	356	303	1,160	1,329
Balance	8,031	8,090	8,031	8,090
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	663	1,032	863	1,070
Charge-offs			(2)	(184)
Provision for loan losses	(79)	(11)	(277)	135
Balance	584	1,021	584	1,021
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	1,554	1,670	1,697	2,263
Charge-offs	(27)	(120)	(97)	(219)
Recoveries				1
Provision for loan losses	151	334	78	(161)
Balance	1,678	1,884	1,678	1,884
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	3,790	3,029	3,685	3,442
Charge-offs	(172)		(1,115)	(35)
Recoveries	8	8	33	12
Provision for loan losses	49	553	1,072	171
Balance	3,675	3,590	3,675	3,590
Commercial Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	1,056	1,481	989	959
Charge-offs		(8)	(79)	(968)
Recoveries	1	2	132	18
Provision for loan losses	7	(472)	22	994
Balance	1,064	1,003	1,064	1,003
Public Sector And IDA [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	278	111	132	142
Provision for loan losses	2	(6)	148	(37)
Balance	280	105	280	105
Consumer Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	552	513	576	424
Charge-offs	(125)	(68)	(275)	(274)
Recoveries	19	21	47	61
Provision for loan losses	163	(59)	261	196
Balance	609	407	609	407
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	78	116	285	49
Provision for loan losses	63	(36)	(144)	31
Balance	$ 141	$ 80	$ 141	$ 80