Note 16 - 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, 2017	Sep. 30, 2016	Dec. 31, 2016
Other real estate owned	$ 39	$ 382
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	2,530		$ 2,933
Impaired loans	(280)	(1,612)
Other real estate owned	2,640		4,488
Other real estate owned	(171)	(62)
Total	5,170		7,421
Total	(451)	$ (1,674)
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	2,530		2,933
Other real estate owned	2,640		4,488
Total	$ 5,170		$ 7,421