Note 12 - Income Taxes - Reconciliation of the Expected Federal Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income tax expense (benefit) at statutory rate	$ 984	$ (3,802)
State income taxes, net of federal tax benefit	36	(54)
Valuation allowance	(688)	(131,234)
Change in federal tax rate		33,640
Change in state tax rate		100,899
Bankruptcy reorganization	17	746
Uncertain tax positions	(371)	(4)
Other	(267)	(177)
Total income tax expense (benefit)	$ (289)	$ 14