Note 18 - Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value on a Non-recurring Basis, and the Method Used to Determine Their Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value	$ 15,501	$ 20,292
Impaired Loans [Member]
Fair Value	14,968	15,360
Other Real Estate Owned [Member]
Fair Value	533	4,932
Fair Value, Inputs, Level 1 [Member]
Fair Value
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Fair Value
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Fair Value
Fair Value, Inputs, Level 2 [Member]
Fair Value
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Fair Value
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Fair Value
Fair Value, Inputs, Level 3 [Member]
Fair Value	15,501	20,292
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Fair Value	14,968	15,360
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]
Fair Value	$ 533	$ 4,932