Note 4 - Fair Value Disclosure Measurements (Details) - Assets Measured on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets Measured on a non-recurring Basis:
Impaired loans	$ 17,658	$ 21,288
Fair Value, Inputs, Level 1 [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	0	0
Other real estate owned	0	0
Fair Value, Inputs, Level 2 [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	0	0
Other real estate owned	0	0
Fair Value, Inputs, Level 3 [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	15,287	17,600
Other real estate owned	2,361	1,846
Estimate of Fair Value Measurement [Member]
Assets Measured on a non-recurring Basis:
Impaired loans	15,287	17,600
Other real estate owned	$ 2,361	$ 1,846