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Note 6 - Income Taxes - Losses Before Income Tax Domestic and Foreign (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Non-U.S. $ (137,225) $ (44,205) $ (99,607)
United States (60,436) (69,290) (53,912)
Loss before income taxes $ (197,661) $ (113,495) $ (153,519)