Note 4 - Loans and Allowance for Loan Losses (Details) - Loans Individually Evaluated for Impairment (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
With an allowance recorded:
Loans with Related Allowance Recorded, Recorded Investment	$ 7,680		$ 7,701
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated	2,449	2,112	2,625
Total Loans, Unpaid Principal Balance	16,098	18,831	16,255
Total Loans, Recorded Investment	14,386	16,919	14,696
Total Loans, Allowance for Loan Losses Allocated	2,449	2,112	2,625
Total Loans, Average Impaired Loans	14,541	17,167	13,693
Total Loans, Interest Income Recognized	166	216	775
Total Loans, Cash Basis Interest Recognized	166	216	775
Residential Real Estate Loans [Member]
With no related allowance recorded:
Loans with No Related Allowance Recorded, Unpaid Principal Balance	526	830	766
Loans with No Related Allowance Recorded, Recorded Investment	526	686	766
Loans with No Related Allowance Recorded, Average Impaired Loans	527	703	539
Loans with No Related Allowance Recorded, Interest Income Recognized	7	3	41
Loans with No Related Allowance Recorded, Cash Basis Interest Recognized	7	3	41
With an allowance recorded:
Loans with Related Allowance Recorded, Unpaid Principal Balance	901	426	672
Loans with Related Allowance Recorded, Recorded Investment	901	426	672
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated	232	133	213
Loans with Related Allowance Recorded, Average Impaired Loans	906	423	524
Loans with Related Allowance Recorded, Interest Income Recognized	9	4	35
Loans with Related Allowance Recorded, Cash Basis Interest Recognized	9	4	35
Total Loans, Allowance for Loan Losses Allocated	232	133	213
Commercial Real Estate Owner Occupied [Member]
With no related allowance recorded:
Loans with No Related Allowance Recorded, Unpaid Principal Balance	1,827	5,644	1,539
Loans with No Related Allowance Recorded, Recorded Investment	1,124	5,098	992
Loans with No Related Allowance Recorded, Average Impaired Loans	1,203	5,313	809
Loans with No Related Allowance Recorded, Interest Income Recognized	9	72	39
Loans with No Related Allowance Recorded, Cash Basis Interest Recognized	9	72	39
With an allowance recorded:
Loans with Related Allowance Recorded, Unpaid Principal Balance			290
Loans with Related Allowance Recorded, Recorded Investment			290
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated			157
Loans with Related Allowance Recorded, Average Impaired Loans			116
Total Loans, Allowance for Loan Losses Allocated			157
Commercial Real Estate Nonowner Occupied [Member]
With no related allowance recorded:
Loans with No Related Allowance Recorded, Unpaid Principal Balance	6,292	7,849	6,343
Loans with No Related Allowance Recorded, Recorded Investment	5,692	7,049	5,743
Loans with No Related Allowance Recorded, Average Impaired Loans	5,717	7,052	6,359
Loans with No Related Allowance Recorded, Interest Income Recognized	75	93	345
Loans with No Related Allowance Recorded, Cash Basis Interest Recognized	75	93	345
With an allowance recorded:
Loans with Related Allowance Recorded, Unpaid Principal Balance	3,331	3,441	3,357
Loans with Related Allowance Recorded, Recorded Investment	3,331	3,441	3,357
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated	1,361	1,979	1,384
Loans with Related Allowance Recorded, Average Impaired Loans	3,344	3,456	3,423
Loans with Related Allowance Recorded, Interest Income Recognized	34	41	164
Loans with Related Allowance Recorded, Cash Basis Interest Recognized	34	41	164
Total Loans, Allowance for Loan Losses Allocated	1,361	1,979	1,384
Commercial and Industrial [Member]
With no related allowance recorded:
Loans with No Related Allowance Recorded, Unpaid Principal Balance	2,066	422	2,223
Loans with No Related Allowance Recorded, Recorded Investment	1,657		1,811
Loans with No Related Allowance Recorded, Average Impaired Loans	1,734		1,234
Loans with No Related Allowance Recorded, Interest Income Recognized	20		96
Loans with No Related Allowance Recorded, Cash Basis Interest Recognized	20		96
With an allowance recorded:
Loans with Related Allowance Recorded, Unpaid Principal Balance	937		847
Loans with Related Allowance Recorded, Recorded Investment	937		847
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated	850		864
Loans with Related Allowance Recorded, Average Impaired Loans	892		602
Loans with Related Allowance Recorded, Interest Income Recognized	10		46
Loans with Related Allowance Recorded, Cash Basis Interest Recognized	10		46
Total Loans, Allowance for Loan Losses Allocated	850		864
Home Equity Loans [Member]
With no related allowance recorded:
Loans with No Related Allowance Recorded, Unpaid Principal Balance		219
Loans with No Related Allowance Recorded, Recorded Investment		219
Loans with No Related Allowance Recorded, Average Impaired Loans		220
Loans with No Related Allowance Recorded, Interest Income Recognized		3
Loans with No Related Allowance Recorded, Cash Basis Interest Recognized		3
With an allowance recorded:
Loans with Related Allowance Recorded, Unpaid Principal Balance	218		218
Loans with Related Allowance Recorded, Recorded Investment	218		218
Loans with Related Allowance Recorded, Allowance for Loan Losses Allocated	6		7
Loans with Related Allowance Recorded, Average Impaired Loans	218		87
Loans with Related Allowance Recorded, Interest Income Recognized	2		9
Loans with Related Allowance Recorded, Cash Basis Interest Recognized	2		9
Total Loans, Allowance for Loan Losses Allocated	$ 6		$ 7