Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured on a Nonrecurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
SBA servicing assets	$ 4,174	$ 4,319	$ 4,099	$ 4,040	$ 4,067	$ 3,477
Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
Impaired loans	6,462		15,838
Other real estate owned	11,923		2,135
SBA servicing assets	4,174		4,099
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 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 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 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 3 [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured on a Nonrecurring Basis [Line Items]
SBA servicing assets	4,174		4,099
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	6,462		15,838
Other real estate owned	11,923		2,135
SBA servicing assets	$ 4,174		$ 4,099