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INCOME TAXES - Schedule of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current:      
Federal $ 11 $ 561 $ (200)
State 128 128 115
Foreign 1,744 2,198 1,960
Total current 1,883 2,887 1,875
Deferred:      
Federal 9,790 (8,481) 49,570
State 1,630 (1,414) (4,833)
Foreign 383 (1,477) (816)
Change in valuation allowance (6,504) 11,885 (64,236)
Total deferred 5,299 513 (20,315)
Total $ 7,182 $ 3,400 $ (18,440)