Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	$ 4,267	$ 4,099	$ 3,805	$ 3,477
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
SBA servicing assets	0	0
Fair Value, Inputs, Level 1 [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
SBA servicing assets	0	0
Fair Value, Inputs, Level 2 [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	15,718	15,838
Other real estate owned	1,141	2,135
SBA servicing assets	4,267	4,099
Fair Value, Inputs, Level 3 [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
SBA servicing assets	4,267	4,099
Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On a Nonrecurring Basis [Line Items]
Impaired loans	15,718	15,838
Other real estate owned	1,141	2,135
SBA servicing assets	$ 4,267	$ 4,099