Note 13 - Income Taxes - Consolidated Provisions for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Federal
Current									$ (157)	$ 65
Deferred									859	3,105
Total federal									702	3,170
State
Current									59	143
Deferred									140	(278)
Total state									199	(135)
Total	$ 470	$ 269	$ 81	$ 81	$ 2,600	$ 173	$ 132	$ 130	$ 901	$ 3,035