Note 7 - Allowance for Loan and Lease Losses (Details) - Allowance for Loan and Lease Losses by Loan Category (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 489,441	$ 462,986
Residential Real Estate Loans Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	982	903
Charge-offs	(84)
Provisions	158	(25)
Ending Balance	1,056	878
Residential Real Estate Loans Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	63,865	64,103
Residential Construction Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	17	17
Provisions	4	(3)
Ending Balance	21	14
Residential Construction Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,631	989
Residential Lots and Raw Land Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			11	13
Ending Balance	11	13	11	13
Residential Lots and Raw Land Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	808	895
Commercial Real Estate Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,516	3,647
Charge-offs		(1)
Recoveries	9	6
Provisions	(56)	(115)
Ending Balance	3,469	3,537
Commercial Real Estate Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	248,603	218,653
Commercial Construction Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	375	343
Recoveries		1
Provisions	(1)	62
Ending Balance	374	406
Commercial Construction Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	28,283	26,580
Commercial Lots and Raw Land Collectively Evaluation [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	377	415
Provisions	(25)	(51)
Ending Balance	352	364
Commercial Lots and Raw Land Collectively Evaluation [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	23,763	20,890
Commercial and Industrial Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	400	430
Charge-offs		(2)
Recoveries	2	2
Provisions	(16)	(3)
Ending Balance	386	427
Commercial and Industrial Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	29,530	28,333
Lease Receivables Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	172	113
Charge-offs		(1)
Provisions	12	25
Ending Balance	184	137
Lease Receivables Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	12,637	10,123
Consumer Real Estate Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	250	316
Recoveries	6	9
Provisions	(36)	(18)
Ending Balance	220	307
Consumer Real Estate Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	17,635	20,529
Consumer Construction Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	19	23
Provisions	1	(6)
Ending Balance	20	17
Consumer Construction Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,583	1,173
Consumer Lots and Raw Land Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	152	203
Provisions	9	54
Ending Balance	161	257
Consumer Lots and Raw Land Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,817	12,809
Home Equity Lines of Credit Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	405	463
Recoveries	1	6
Provisions	(27)	7
Ending Balance	379	476
Home Equity Lines of Credit Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	27,142	27,780
Consumer Other Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	52	60
Charge-offs	(3)	(3)
Recoveries	6	4
Provisions	12	(5)
Ending Balance	67	56
Consumer Other Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,381	4,163
Total Collectively Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	6,728	6,946
Charge-offs	(87)	(7)
Recoveries	24	28
Provisions	35	(78)
Ending Balance	6,700	6,889
Total Collectively Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	470,678	437,020
Residential Real Estate Loans Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	185
Charge-offs	(185)
Residential Real Estate Loans Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,109	1,139
Commercial Real Estate Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	167	510
Charge-offs		(9)
Recoveries	2	4
Provisions	(34)	304
Ending Balance	135	809
Commercial Real Estate Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,318	17,207
Commercial Construction Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	103	2,848
Commercial Lots and Raw Land Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	251
Charge-offs	(3)
Provisions	(218)
Ending Balance	30
Commercial Lots and Raw Land Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,857	3,611
Commercial and Industrial Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		23
Charge-offs		(49)
Provisions	224	26
Ending Balance	224
Commercial and Industrial Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	289	49
Consumer Real Estate Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		25	19
Charge-offs		(24)
Provisions		1
Ending Balance	19	2	19
Consumer Real Estate Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	470	289
Consumer Lots and Raw Land Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	165	105
Charge-offs	(69)
Provisions	(1)	(1)
Ending Balance	95	104
Consumer Lots and Raw Land Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	617	671
Home Equity Lines of Credit Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5
Recoveries	1	2
Provisions	(6)	(2)
Home Equity Lines of Credit Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		57
Consumer Other Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		95
Total Individually Evaluated [Member] | Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	792	663
Charge-offs	(257)	(82)
Recoveries	3	6
Provisions	(35)	328
Ending Balance	503	915
Total Individually Evaluated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	18,763	25,966
Allowance for Loan and Lease Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	7,520	7,609
Charge-offs	(344)	(89)
Recoveries	27	34
Provisions		250
Ending Balance	$ 7,203	$ 7,804