REVENUE & ACCOUNTS RECEIVABLE, NET - Co-pay Assistance Program (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Trade Discounts, Allowances and Chargebacks
Beginning balance	$ 1,396	$ 1,783
Provision related to current period sales	335	725
Changes in estimate related to prior period sales	3	2
Credit/payments made	(1,336)	(1,114)
Ending balance	398	1,396
Product Returns
Beginning balance	114	180
Changes in estimate related to prior period sales	(51)	(66)
Credit/payments made	1
Ending balance	64	114
Rebates and Incentives
Beginning balance	6,623	10,044
Provision related to current period sales	2,194	4,576
Changes in estimate related to prior period sales	(234)	93
Credit/payments made	(3,013)	(8,090)
Ending balance	$ 5,570	$ 6,623