PRODUCT REVENUE - Concentrations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Concentration risk
Contractual Allowances and Government Rebates, Change in estimate resulting in benefit	$ 709		$ 709
McKesson | Customer Concentration Risk | Revenue | Product
Concentration risk
Concentration risk percentage (as a percent)	78.00%	66.00%	69.00%	73.00%
AmerisourceBergen | Customer Concentration Risk | Revenue | Product
Concentration risk
Concentration risk percentage (as a percent)	14.00%	24.00%	16.00%	17.00%