Note 20 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other real estate owned	$ 409	$ (147)	$ 271
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	1,393	2,058
Impaired loans	(1,099)	(208)
Other real estate owned	4,488	3,782
Other real estate owned	(62)	(2)
Total	5,881	5,840
Total	(1,161)	(210)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans
Other real estate owned
Total
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans
Other real estate owned
Total
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	1,393	2,058
Other real estate owned	4,488	3,782
Total	$ 5,881	$ 5,840