INCOME TAXES - Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Domestic and foreign loss before income taxes:
Losses before taxes	$ (40,400)	$ (18,000)	$ (66,600)	$ (34,000)
Income tax expense
Current income taxes	0	0
Deferred income taxes	$ 0	$ 0

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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