DEBT - Summary of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Amortization of debt discounts, and royalty rights	$ 194	$ 5,680
Interest expense	10,220	15,925
Convertible debt
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization	6	1,727
Senior Notes
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization	0	1,648
Senior Notes | 13% Senior Secured Note due 2024
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization	$ 10,020	$ 6,870