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Income Taxes - Provision for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current income taxes:      
Federal $ 0 $ (185) $ (91)
State 459 264 (73)
Foreign 5,010 2,594 1,374
Total current income taxes 5,469 2,673 1,210
Deferred income taxes:      
Federal 187 (17) 155
State 255 42 76
Foreign (551) (64) (11)
Total deferred income taxes (109) (39) 220
Total income tax provision $ 5,360 $ 2,634 $ 1,430