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Note 14 - Operating Segments - Geographic Segments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue $ 167,007 $ 304,714 $ 285,299
Long-lived assets 90,502 108,729 94,639
UNITED STATES      
Revenue 151,187 258,691 255,256
Long-lived assets 76,879 89,597 80,617
Non-US [Member]      
Revenue 15,820 46,023 30,043
Long-lived assets $ 13,623 $ 19,132 $ 14,022