LICENSE, COLLABORATION AND OTHER REVENUE - International Collaboration and License Agreement with Otsuka Pharmaceutical Co. Ltd. (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Recognized revenue	$ 42,046	$ 48,714	$ 138,427	$ 236,702
License, collaboration and other revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Recognized revenue	1,928	6,725	21,359	110,032
Otsuka Pharmaceutical Company. Ltd. | Otsuka International Agreement | License, collaboration and other revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Recognized revenue	$ 0	$ 0	$ 0	$ 5,503