REVENUE RECOGNITION AND RELATED ALLOWANCES - Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total net revenues	$ 486,816	$ 316,385	$ 216,136
Sales of generic pharmaceutical products
Disaggregation of Revenue [Line Items]
Total net revenues	269,449	210,121	143,571
Sales of established brand pharmaceutical products, royalties, and other pharmaceutical services
Disaggregation of Revenue [Line Items]
Total net revenues	105,250	64,578	72,565
Sales of rare disease pharmaceutical products
Disaggregation of Revenue [Line Items]
Total net revenues	$ 112,117	$ 41,686	$ 0