Note 4 - Fair Value Measurements (Detail) - Assets Measured on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	$ 6,061	$ 13,581
Other real estate owned	1,986	2,196
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	6,061	13,581
Other real estate owned	$ 1,986	$ 2,196