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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 7,952	$ 8,168	$ 8,349	$ 8,068
Charge-offs	(196)	(716)	(1,680)	(2,444)
Recoveries	31	24	92	76
Provision for loan losses	303	778	1,329	2,554
Ending Balance	8,090	8,254	8,090	8,254
Allowance for Loan Losses, Individually evaluated for impairment	631		631		554
Allowance for Loan Losses, Collectively evaluated for impairment	7,459		7,459		7,795
Allowance for Loan Losses, Total	8,090	8,254	8,090	8,254
Loans, Individually evaluated for impairment	17,046		17,046		18,456
Loans, Collectively evaluated for impairment	574,506		574,506		574,659
Loans, Total	591,552		591,552		593,115
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,032	1,396	1,070	1,079
Charge-offs		(51)	(184)	(640)
Recoveries				13
Provision for loan losses	(11)	(158)	135	735
Ending Balance	1,021	1,187	1,021	1,187
Allowance for Loan Losses, Collectively evaluated for impairment	1,021		1,021		1,070
Allowance for Loan Losses, Total	1,021	1,187	1,021	1,187
Loans, Individually evaluated for impairment	2,992		2,992		6,643
Loans, Collectively evaluated for impairment	52,030		52,030		43,670
Loans, Total	55,022		55,022		50,313
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,670	1,910	2,263	1,245
Charge-offs	(120)	(33)	(219)	(278)
Recoveries			1	2
Provision for loan losses	334	95	(161)	1,003
Ending Balance	1,884	1,972	1,884	1,972
Allowance for Loan Losses, Individually evaluated for impairment	11		11		43
Allowance for Loan Losses, Collectively evaluated for impairment	1,873		1,873		2,220
Allowance for Loan Losses, Total	1,884	1,972	1,884	1,972
Loans, Individually evaluated for impairment	1,199		1,199		864
Loans, Collectively evaluated for impairment	145,248		145,248		142,398
Loans, Total	146,447		146,447		143,262
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,029	3,257	3,442	3,515
Charge-offs		(592)	(35)	(1,329)
Recoveries	8		12
Provision for loan losses	553	872	171	1,351
Ending Balance	3,590	3,537	3,590	3,537
Allowance for Loan Losses, Individually evaluated for impairment	617		617		273
Allowance for Loan Losses, Collectively evaluated for impairment	2,973		2,973		3,169
Allowance for Loan Losses, Total	3,590	3,537	3,590	3,537
Loans, Individually evaluated for impairment	12,719		12,719		10,329
Loans, Collectively evaluated for impairment	289,171		289,171		293,979
Loans, Total	301,890		301,890		304,308
Commercial Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,481	909	959	1,473
Charge-offs	(8)		(968)	(5)
Recoveries	2	1	18	2
Provision for loan losses	(472)	(46)	994	(606)
Ending Balance	1,003	864	1,003	864
Allowance for Loan Losses, Individually evaluated for impairment	3		3		231
Allowance for Loan Losses, Collectively evaluated for impairment	1,000		1,000		728
Allowance for Loan Losses, Total	1,003	864	1,003	864
Loans, Individually evaluated for impairment	112		112		574
Loans, Collectively evaluated for impairment	31,217		31,217		36,775
Loans, Total	31,329		31,329		37,349
Public Sector and IDA [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	111	111	142	232
Provision for loan losses	(6)	34	(37)	(87)
Ending Balance	105	145	105	145
Allowance for Loan Losses, Collectively evaluated for impairment	105		105		142
Allowance for Loan Losses, Total	105	145	105	145
Loans, Collectively evaluated for impairment	28,332		28,332		26,169
Loans, Total	28,332		28,332		26,169
Consumer Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	513	422	424	403
Charge-offs	(68)	(40)	(274)	(192)
Recoveries	21	23	61	59
Provision for loan losses	(59)	(5)	196	130
Ending Balance	407	400	407	400
Allowance for Loan Losses, Individually evaluated for impairment					7
Allowance for Loan Losses, Collectively evaluated for impairment	407		407		417
Allowance for Loan Losses, Total	407	400	407	400
Loans, Individually evaluated for impairment	24		24		46
Loans, Collectively evaluated for impairment	28,508		28,508		31,668
Loans, Total	28,532		28,532		31,714
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	116	163	49	121
Provision for loan losses	(36)	(14)	31	28
Ending Balance	80	149	80	149
Allowance for Loan Losses, Collectively evaluated for impairment	80		80		49
Allowance for Loan Losses, Total	$ 80	$ 149	$ 80	$ 149