INCOME TAXES - Components of Pre-tax Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Total Loss Before Income Taxes	$ (8,609)	$ (20,952)	$ (107,500)
United States
Income Taxes [Line Items]
Pre-tax income (loss) U.S.	(32,757)	(35,529)	(27,468)
Canada
Income Taxes [Line Items]
Pre-tax income (loss) Canada	$ 24,148	$ 14,577	$ (80,032)