Note 11 - Income Taxes - Domestic and Foreign Components of Loss from Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
United States	$ (32,094)	$ (34,398)	$ (91,935)
Foreign	(30,143)	(26,430)	(65,390)
Loss before income taxes	$ (62,237)	$ (60,828)	$ (157,325)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details