REVENUE RECOGNITION AND RELATED ALLOWANCES - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue recognition	$ 73,855	$ 48,625	$ 138,332	$ 103,146
Sales of generic pharmaceutical products
Revenue recognition	49,863	34,199	98,970	66,812
Sales of established brand pharmaceutical products
Revenue recognition	8,463	11,038	16,915	18,555
Sales of rare disease pharmaceutical products
Revenue recognition	10,202		11,494
Sales of contract manufactured products
Revenue recognition	4,389	2,322	7,293	4,895
Royalties from licensing agreements
Revenue recognition	194		2,097	11,210
Product development services
Revenue recognition	531	97	1,097	255
Other
Revenue recognition	$ 213	$ 969	$ 466	$ 1,419

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details