Note 14 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 14 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	$ 4,099	$ 3,477	$ 2,340
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 14 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	15,838	17,474
Other real estate owned	2,135	3,921
SBA servicing assets	4,099	3,477
Fair Value, Inputs, Level 3 [Member]
Note 14 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	4,099	3,477
Fair Value, Measurements, Nonrecurring [Member]
Note 14 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	15,838	17,474
Other real estate owned	2,135	3,921
SBA servicing assets	$ 4,099	$ 3,477