REVENUE - Summary of Contract Assets and Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Contract With Customer, Asset [Roll Forward]
Contract asset, Beginning of Period	$ 2,416
Additions	1,083
Deductions	(1,603)
Contract asset, End of Period	1,896
Contract asset - CAMBIA Canada
Contract With Customer, Asset [Roll Forward]
Contract asset, Beginning of Period	0
Additions	300
Deductions	(300)
Contract asset, End of Period	0
Contract asset - Collegium, net
Contract With Customer, Asset [Roll Forward]
Contract asset, Beginning of Period	2,416
Additions	783
Deductions	(1,303)
Contract asset, End of Period	$ 1,896