Note 6 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Domestic	$ (868)	$ (701)	$ (454)
Foreign	(6,355)	(7,289)	(4,382)
Total current income tax provision	(7,223)	(7,990)	(4,836)
Domestic	4,392	15,243	7,147
Foreign	2,696	16,848	4,390
Total deferred income tax benefit	7,088	32,091	11,537
Total (provision) benefit	$ (135)	$ 24,101	$ 6,701