Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	$ 209,119	$ 185,379
Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	209,119	185,379
Collateralized Mortgage Obligations [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	128,387	99,222
Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	128,387	99,222
Collateralized Mortgage Backed Securities [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,424	13,802
Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,424	13,802
US States and Political Subdivisions Debt Securities [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	22,084	16,107
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	22,084	16,107
Corporate Debt Securities [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	29,221	34,427
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	29,221	34,427
Asset-backed Securities [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,214	18,505
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,214	18,505
Collateralized Debt Obligations [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,670	3,193
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,670	3,193
Other Debt Obligations [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	119	123
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	119	123
Fair Value, Inputs, Level 1 [Member]
Note 7 - Fair Value 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] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	204,748	179,181
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	204,748	179,181
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	128,387	99,222
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	10,424	13,802
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	22,084	16,107
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	26,520	31,422
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	17,214	18,505
Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value 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 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	119	123
Fair Value, Inputs, Level 3 [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	4,371	6,198
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	4,371	6,198
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value 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 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	2,701	3,005
Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value 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 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	1,670	3,193
Fair Value, Inputs, Level 3 [Member] | Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) - Financial Assets Measured at on a Recurring Basis [Line Items]
Investment securities available for sale, at fair value	$ 0	$ 0