Note 4 - Loans and Allowance for Loan Losses (Details) - Risk Category of Commercial Loans by Class of Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commercial real estate:
Commercial Loans	$ 259,864	$ 250,031
Owner Occupied [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	86,389	86,497
Owner Occupied [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	5,210	5,310
Owner Occupied [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	2,573	2,779
Owner Occupied [Member]
Commercial real estate:
Commercial Loans	94,172	94,586
Nonowner Occupied [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	51,814	51,119
Nonowner Occupied [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	7,049	7,107
Nonowner Occupied [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	3,798	3,882
Nonowner Occupied [Member]
Commercial real estate:
Commercial Loans	62,661	62,108
Construction [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	29,169	27,998
Construction [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	937	974
Construction [Member]
Commercial real estate:
Commercial Loans	30,106	28,972
Commercial and Industrial [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	64,893	56,962
Commercial and Industrial [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	4,281	4,081
Commercial and Industrial [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	3,751	3,322
Commercial and Industrial [Member]
Commercial real estate:
Commercial Loans	72,925	64,365
Pass [Member]
Commercial real estate:
Commercial Loans	232,265	222,576
Criticized [Member]
Commercial real estate:
Commercial Loans	16,540	16,498
Classified [Member]
Commercial real estate:
Commercial Loans	$ 11,059	$ 10,957