Note 4 - Fair Value Measurements (Details) - Assets Measured on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets measured on a nonrecurring basis:
Impaired loans	$ 12,057	$ 14,368
Fair Value, Inputs, Level 3 [Member]
Assets measured on a nonrecurring basis:
Impaired loans	11,059	12,772
Other real estate owned	2,203	2,590
Estimate of Fair Value Measurement [Member]
Assets measured on a nonrecurring basis:
Impaired loans	11,059	12,772
Other real estate owned	$ 2,203	$ 2,590