LICENSE, COLLABORATION AND OTHER REVENUE - Revenues Recognized From License, Collaboration and Other Significant Agreements (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Dec. 11, 2015	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
License Collaboration And Other Revenue [Abstract]
Total revenues		$ 43,648	$ 56,376	$ 76,255	$ 96,381
MTPC
License Collaboration And Other Revenue [Abstract]
Total revenues	$ 5,900
License, collaboration and other revenue
License Collaboration And Other Revenue [Abstract]
Total revenues		2,439	14,132	4,037	19,431
License, collaboration and other revenue | Medice
License Collaboration And Other Revenue [Abstract]
Total revenues		0	10,000	0	10,000
License, collaboration and other revenue | MTPC
License Collaboration And Other Revenue [Abstract]
Total revenues		1,169	516	1,581	4,678
License, collaboration and other revenue | JT and Torii
License Collaboration And Other Revenue [Abstract]
Total revenues		1,270	1,391	2,456	2,528
License, collaboration and other revenue | Otsuka | Otsuka
License Collaboration And Other Revenue [Abstract]
Total revenues		0	2,225	0	2,225
License, collaboration and other revenue | Total license and other revenue
License Collaboration And Other Revenue [Abstract]
Total revenues		$ 2,439	$ 14,132	$ 4,037	$ 19,431