Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Current:
Domestic		$ (12,797)
Foreign	1,206	5,515
Total current income tax provision (benefit)	1,206	(7,282)
Deferred:
Domestic		(18,903)
Foreign	(438)	(2,886)
Total deferred income tax (benefit) provision	(438)	(21,789)
Total income tax provision (benefit)	$ 768	$ (29,071)