Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	$ 222,844	$ 181,712
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	194,219	147,854
US Government Agencies Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	194,219	147,854
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	19,380	23,456
US States and Political Subdivisions Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	19,380	23,456
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	2,014	2,840
Collateralized Mortgage Backed Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	2,014	2,840
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	7,104	7,395
Corporate Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	7,104	7,395
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	127	167
Other Debt Obligations [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	127	167
Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	$ 222,844	$ 181,712