Note 6 - Loans (Details) - Average Recorded Investment and Income Recognized on Impaired Loans (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	$ 8,945	$ 13,075	$ 14,517
Period End Loans With No Allocated Allowance Interest Income Recognized	293	1,006	568
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	18,784	22,391	19,599
Period End Loans With Allocated Allowance Interest Income Recognized	920	522	249
Total
Average Recorded Investment	27,729	35,466	34,116
Interest Income Recognized	1,213	1,528	817
Commercial and Industrial [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	920	2,862	2,073
Period End Loans With No Allocated Allowance Interest Income Recognized	27	160	116
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	989	880	722
Period End Loans With Allocated Allowance Interest Income Recognized	57	24	0
Total
Average Recorded Investment	1,909	3,742	2,795
Interest Income Recognized	84	184	116
Commercial Real Estate Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	8,025	10,213	12,444
Period End Loans With No Allocated Allowance Interest Income Recognized	266	846	452
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	8,476	10,561	9,003
Period End Loans With Allocated Allowance Interest Income Recognized	517	52	28
Total
Average Recorded Investment	16,501	20,774	21,447
Interest Income Recognized	783	898	480
First Lien Residential Mortgage Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	8,584	9,998	9,223
Period End Loans With Allocated Allowance Interest Income Recognized	327	416	219
Total
Average Recorded Investment	8,584	9,998	9,223
Interest Income Recognized	327	416	219
Junior Lein Residential Mortgage Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	470	502	459
Period End Loans With Allocated Allowance Interest Income Recognized	12	13	2
Total
Average Recorded Investment	470	502	459
Interest Income Recognized	12	13	2
Consumer Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	265	450	192
Period End Loans With Allocated Allowance Interest Income Recognized	7	17	0
Total
Average Recorded Investment	265	450	191
Interest Income Recognized	$ 7	$ 17	$ 0