Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Domestic	$ (705)	$ (315)	$ (1,690)	$ (317)
Foreign	(2,286)	(2,467)	(6,005)	(5,260)
Total current income tax (provision) benefit	(2,991)	(2,782)	(7,695)	(5,577)
Domestic	192	2,652	3,307	10,585
Foreign	1,166	1,744	3,191	15,001
Total deferred income tax benefit (provision)	1,358	4,396	6,498	25,586
Total income tax (provision) benefit	$ (1,633)	$ 1,614	$ (1,197)	$ 20,009