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COLLABORATION AND LICENSING AGREEMENTS - Recognized Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 74,114	$ 46,023
Licensing revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	5,020	17
Licensing revenue | Fosun Agreement | Fosun Pharma
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	5,000	0
Licensing revenue | Knight Agreement | Knight
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	20	17
Product supply revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	254	2,126
Product supply revenue | 2017 KKC Agreement | Kyowa Kirin
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	0	2,126
Product supply revenue | Knight Agreement | Knight
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	254	0
Non-cash royalty revenue related to the sale of future royalties
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	1,026	368
Non-cash royalty revenue related to the sale of future royalties | 2017 KKC Agreement | Kyowa Kirin
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 1,026	$ 368

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