Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available for sale	$ 236,131	$ 222,844
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	212,464	194,219
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	16,475	19,380
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	1,319	2,014
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	5,746	7,104
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	127
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	236,131	222,844
Fair Value, Inputs, Level 2 [Member] | 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	212,464	194,219
Fair Value, Inputs, Level 2 [Member] | 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	16,475	19,380
Fair Value, Inputs, Level 2 [Member] | 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	1,319	2,014
Fair Value, Inputs, Level 2 [Member] | 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	5,746	7,104
Fair Value, Inputs, Level 2 [Member] | 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	$ 127