Note 5 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Domestic	$ (701)	$ (454)	$ 22,171
Foreign	(7,289)	(4,382)	(22,526)
Total current income tax benefit (provision)	(7,990)	(4,836)	(355)
Domestic	15,243	7,147	(30,766)
Foreign	16,848	4,390	10,158
Total deferred income tax benefit (provision)	32,091	11,537	(20,608)
Total benefit (provision)	$ 24,101	$ 6,701	$ (20,963)