Note 4 - Loans and Allowance for Loan Losses (Details) - Risk Category of Commercial Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Commercial real estate:
Commercial Loans	$ 239,115	$ 232,249
Owner Occupied [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	85,768	87,614
Owner Occupied [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	8,847	14,057
Owner Occupied [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	3,314	3,171
Owner Occupied [Member]
Commercial real estate:
Commercial Loans	97,929	104,842
Nonowner Occupied [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	45,723	39,627
Nonowner Occupied [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	5,733	2,171
Nonowner Occupied [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	4,039	10,994
Nonowner Occupied [Member]
Commercial real estate:
Commercial Loans	55,495	52,792
Construction [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	23,163	16,276
Construction [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	0	0
Construction [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	1,006	1,100
Construction [Member]
Commercial real estate:
Commercial Loans	24,169	17,376
Commercial and Industrial [Member] | Pass [Member]
Commercial real estate:
Commercial Loans	57,264	47,226
Commercial and Industrial [Member] | Criticized [Member]
Commercial real estate:
Commercial Loans	578	4,793
Commercial and Industrial [Member] | Classified [Member]
Commercial real estate:
Commercial Loans	3,680	5,220
Commercial and Industrial [Member]
Commercial real estate:
Commercial Loans	61,522	57,239
Pass [Member]
Commercial real estate:
Commercial Loans	211,918	190,743
Criticized [Member]
Commercial real estate:
Commercial Loans	15,158	21,021
Classified [Member]
Commercial real estate:
Commercial Loans	$ 12,039	$ 20,485