DEBT - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Amortization of debt issuance costs and Royalty Rights	$ 80	$ 41	$ 128	$ 159
Total interest expense	2,052	2,495	6,648	7,783
Senior Notes | 6.5% Senior Convertible Notes due 2027
Debt Instrument [Line Items]
Interest payable on notes	456	0	456	0
Senior Notes | Senior Secured Notes Due 2024
Debt Instrument [Line Items]
Interest payable on notes	0	0	0	6
Convertible notes
Debt Instrument [Line Items]
Interest payable on notes	$ 1,516	$ 2,454	$ 6,064	$ 7,618