Note 6 - Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Amortization of Intangible Assets	$ 396	$ 314	$ 273
Fidelity [Member] | Core Deposits [Member]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	1,500	2,300
Finite-Lived Intangible Assets, Remaining Amortization Period	3.2
Fidelity [Member]
Business Acquisition, Purchase Price Allocation, Goodwill Amount	360
Goodwill	2,200
Business Acquisition, Cost of Acquired Entity, Purchase Price	2,300
Branch Office [Member] | Core Deposits [Member]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	9	215
Finite-Lived Intangible Assets, Remaining Amortization Period	one
Branch Office [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 215