Note 18 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
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	2,299		2,058
Other real estate owned	4,301		3,782
Total	6,600		5,840
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	2,299		2,058
Impaired loans	(1,612)	$ (1,147)
Other real estate owned	4,301		3,782
Other real estate owned	(62)
Total	6,600		$ 5,840
Total	(1,674)	(1,147)
Other real estate owned	$ 382	$ (153)