Note 15 - Income Taxes - Schedule of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal income tax	$ (90)	$ (276)	$ 4,320
State income tax	6	6	693
Total current (benefit) expense	(84)	(270)	5,013
Deferred:
Federal, excluding operating loss carry forwards	2,772	1,680	69,774
State, excluding operating loss carry forwards	(169)	228	19,725
Change in valuation allowance	65	(139)
Tax benefit of operating loss carry forwards:
Federal			(66,285)
State			(18,027)
Total deferred expense	2,668	1,769	5,187
Total income tax expense	$ 2,584	$ 1,499	$ 10,200