Note 11 - Income Taxes - Effective Income Tax Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Computed expected tax (benefit) expense	$ (931)	$ (167)
State income tax expense, net of Federal tax effect	(129)	(23)
Other, net (primarily change in prior estimates)	739	(165)
Change in valuation allowance (regarding current year activity)	313	363
Income Tax (Benefit) Expense	$ (8)	$ 8