Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Current:
Domestic	$ (2)	$ (1)	$ (2)	$ (1)
Foreign	(1,716)	(2,965)	(2,793)	(4,171)
Total current income tax benefit (provision)	(1,718)	(2,966)	(2,795)	(4,172)
Deferred:
Domestic	5,456	0	7,933	0
Foreign	7,441	2,539	13,257	2,977
Total deferred income tax benefit (provision)	12,897	2,539	21,190	2,977
Total income tax benefit (provision)	$ 11,179	$ (427)	$ 18,395	$ (1,195)