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Income Taxes - Income (Loss) Before Provision for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income (loss) before provision for income taxes from:      
U.S. operations $ 1,527 $ (54,190) $ 7,334
Foreign operations 5,761 (59,982) 3,105
Income (loss) before provision for income taxes $ 7,288 $ (114,172) $ 10,439