Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	$ 284,795	$ 185,379
SBA Servicing Assets	4,886	4,099	$ 3,477	$ 2,340
Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	284,795	185,379
SBA Servicing Assets	4,886	4,099
Collateralized Mortgage Obligations [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	178,145	99,222
Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	178,145	99,222
Collateralized Mortgage Backed Securities [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,171	13,802
Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,171	13,802
US States and Political Subdivisions Debt Securities [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	23,344	16,107
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	23,344	16,107
Corporate Debt Securities [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	54,129	34,427
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	54,129	34,427
Asset-backed Securities [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,005	18,505
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,005	18,505
Collateralized Debt Obligations [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,883	3,193
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,883	3,193
Other Debt Obligations [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	118	123
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	118	123
Fair Value, Inputs, Level 1 [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
SBA Servicing Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 2 [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	280,078	179,181
SBA Servicing Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	280,078	179,181
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	178,145	99,222
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,171	13,802
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	23,344	16,107
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	51,295	31,422
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,005	18,505
Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	118	123
Fair Value, Inputs, Level 3 [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	4,717	6,198
SBA Servicing Assets	4,886	4,099
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	4,717	6,198
SBA Servicing Assets	4,886	4,099
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	2,834	3,005
Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,883	3,193
Fair Value, Inputs, Level 3 [Member] | Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	$ 0	$ 0