Note 22 - Fair Value of Financial Instruments - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities available for sale	$ 179,148	$ 198,342
Fair Value, Inputs, Level 1 [Member]
Securities available for sale
Fair Value, Inputs, Level 2 [Member]
Securities available for sale	170,486	190,337
Fair Value, Inputs, Level 3 [Member]
Securities available for sale	8,662	8,005
US Government Agencies Debt Securities [Member]
Securities available for sale	8,953	7,566
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	8,953	7,566
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale
Corporate Debt Securities [Member]
Securities available for sale	13,041	11,127
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	13,041	11,127
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale
Collateralized Mortgage Backed Securities [Member]
Securities available for sale	79,941	99,372
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	79,941	99,372
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale	76,479	79,636
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	67,817	71,631
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	8,662	8,005
Other Debt Obligations [Member]
Securities available for sale	734	641
Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	734	641
Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale