Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Domestic	$ (253)	$ (2)	$ (985)	$ (2)
Foreign	(1,650)	(1,716)	(3,719)	(2,793)
Total current income tax benefit (provision)	(1,903)	(1,718)	(4,704)	(2,795)
Domestic	1,866	5,456	3,116	7,933
Foreign	(589)	7,441	2,024	13,257
Total deferred income tax benefit (provision)	1,277	12,897	5,140	21,190
Total income tax benefit (provision)	$ (626)	$ 11,179	$ 436	$ 18,395