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
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	$ 8,227	$ 8,349
Charge-offs	(191)	(754)
Recoveries	158	25
Provision for loan losses	103	671
Balance	8,297	8,291
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	863	1,070
Charge-offs	(2)	(184)
Provision for loan losses	(11)	287
Balance	850	1,173
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	1,697	2,263
Charge-offs	(54)	(53)
Provision for loan losses	171	(364)
Balance	1,814	1,846
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	3,685	3,442
Charge-offs	(52)	(35)
Recoveries	8
Provision for loan losses	53	(118)
Balance	3,694	3,289
Commercial Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	989	959
Charge-offs		(404)
Recoveries	131	16
Provision for loan losses	(259)	705
Balance	861	1,276
Public Sector and IDA [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	132	142
Provision for loan losses	70	(32)
Balance	202	110
Consumer Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	576	424
Charge-offs	(83)	(78)
Recoveries	19	9
Provision for loan losses	17	230
Balance	529	585
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	285	49
Provision for loan losses	62	(37)
Balance	$ 347	$ 12