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INCOME TAXES - Schedule of provision for income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current:    
Federal $ (1,954) $ 4,784
State (154) 1,510
Foreign 784 777
Total (1,324) 7,071
Deferred 2,755 (869)
Total provision $ 1,431 $ 6,202