Note 17 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 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	1,099		2,058
Other real estate owned	4,353		3,782
Total	5,452		5,840
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	1,099		2,058
Impaired loans	(173)		(2,524)
Other real estate owned	4,353		3,782
Other real estate owned			(175)
Total	5,452		5,840
Total	(173)		$ (2,699)
Other real estate owned	$ 443	$ (165)