LICENSE, COLLABORATION AND OTHER REVENUE - International Collaboration and License Agreement with Otsuka Pharmaceutical Co. Ltd. (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Recognized revenue	$ 56,376	$ 126,365	$ 96,381	$ 187,988
License, collaboration and other revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Recognized revenue	14,132	83,056	19,431	103,307
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